Closing and locking device for rear lower door of high-voltage switch cabinet and use method of closing and locking device

Abstract

The invention belongs to the technical field of high-voltage switch cabinets, and discloses a closing and locking device for a rear lower door of a high-voltage switch cabinet and a use method.The closing and locking device comprises a cabinet door, an installation cavity is formed in the cabinet door, and an auxiliary locking assembly, a hydraulic pushing assembly and an unlocking assembly are elastically installed in the installation cavity; the back surface of the cabinet door is fixedly provided with an electrical locking part, and the cabinet door is installed in the cabinet body through a sizing material. The locking head and the sponge ring in the automatic locking assembly are matched with the lubricating box, in the door closing process of the automatic locking assembly, the sponge ring in the locking head is matched to be extruded to the communicating position of the lubricating box, lubricating oil is guided and absorbed into the sponge ring, and therefore after the locking head is inserted into a sleeve hole of a cabinet door, the sponge ring is used for lubricating the inner wall of the sleeve hole; the occurrence of jamming is reduced, automatic lubrication is achieved, lubricating oil absorbed by the sponge ring is stably stored, oil dripping is avoided, the lubrication stability is good, pollution is small, and the use effect is good.

Description

Technical Field

[0001] The invention belongs to the technical field of high-voltage switch cabinets, and in particular relates to a door closing and locking device for a rear lower door of a high-voltage switch cabinet and a use method thereof. Background Art

[0002] The rear lower door closing and locking device of high-voltage switchgear is a safety device designed to ensure that electrical operation of the equipment is allowed only after the switchgear door is completely closed and locked. It consists of components such as mechanical locking, electronic interlocking, mechanical linkage and safety indication.

[0003] The locking device for closing the rear lower door of a high-voltage switch cabinet in the prior art, during use, because the locking pin needs to be inserted into the cabinet door positioning socket to complete the locking, the good insertion of the pin and the socket determines the stability of the locking. In fact, after long-term use, due to the interference of limited environmental factors, impurities and dust are easily accumulated at the socket, which on the one hand causes greater damping when the pin is inserted into the lock, causing abnormal friction and generating harsh noise. On the other hand, when the impurity particles entering are large, the insertion of the pin is blocked, affecting the normal locking. At present, lubrication and cleaning operations are usually performed. The actual socket space is small, the internal cleaning is difficult, and there is oil dripping after lubrication. The comprehensive treatment is difficult and the effect is poor, which greatly reduces the use effect of the locking device during continuous use. Summary of the invention

[0004] The object of the present invention is to provide a door closing and locking device for a rear lower door of a high-voltage switch cabinet and a method for using the same, so as to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a door closing and locking device for the lower rear door of a high-voltage switch cabinet and a method for using the same, comprising a cabinet door, an installation chamber is provided inside the cabinet door, an auxiliary locking component, a hydraulic pushing component and an unlocking component are elastically installed in the installation chamber, an electrical locking part is fixedly provided on the back of the cabinet door, the cabinet door is installed in the cabinet body by means of rubber, an automatic locking component and a pressure sensing component are movably and elastically installed on the inner side surface of the cabinet body, a sliding box is fixedly provided on the front side of the cabinet body,

[0006] The automatic locking assembly includes a connecting plate, a spring four, a locking column two, a locking head, a sponge ring and a ring groove. The number of the locking columns two is two, and they are symmetrically fixed on the side of the connecting plate. The locking head is fixed to the end of the locking column two. One end of the spring four is fixedly connected to the connecting plate, and the other end is fixed in the inner wall of the cabinet. The ring groove is opened on the outer surface of the locking head, and the sponge ring is fixedly sleeved in the ring groove. The locking columns two correspond to the sleeve holes one by one.

[0007] Preferably, the installation chamber includes a sleeve hole, a middle hole and a connecting cavity, and the sleeve hole, the middle hole and the connecting cavity are all opened in the cabinet door, and the sleeve holes are symmetrically distributed on the upper and lower sides of the middle hole. One end of the connecting cavity is connected to a group of sleeve holes, and the other end is connected to the middle hole. A slide groove is opened on the back of the cabinet door, and the slide groove is connected to the middle hole.

[0008] Preferably, the auxiliary locking assembly includes a locking column, a spring, a slider and an electrical control rod, the locking column is movably sleeved in the middle hole, one end of the spring is fixedly connected to the locking column, and the other end is fixed in the middle hole, the slider is fixedly connected to the outer surface of the locking column, and is slidably sleeved in the slide groove, one end of the electrical control rod is fixed on the slider, and the other end is movably sleeved in the electrical locking part, and controls the on and off of the electrical locking part.

[0009] Preferably, the hydraulic pushing assembly includes a push block, a push rod, a piston plate and spring 2, the push block is fixedly connected to the push rod, the other end of the push rod is fixedly connected to the piston plate, the piston plate is movably sleeved in the connecting cavity, one end of the spring 2 is fixedly connected to the push block, and the other end is fixed in the cabinet door, and the push block is located on the moving path of a group of locking columns 2.

[0010] Preferably, the unlocking assembly includes a movable column, an outer block, an intermediate rod and a spring three, the movable column is located in a sleeve hole and is located on the moving path of the corresponding locking column two, the outer block is slidably sleeved on the front of the cabinet door, the intermediate rod is fixedly connected between the outer block and the movable column, one end of the spring three is fixedly connected to the movable column, and the other end is fixedly connected to the sleeve hole.

[0011] Preferably, an assembly cavity is opened inside the cabinet, a positioning cavity is opened on the inner side surface of the cabinet, the connecting plate is movably sleeved in the assembly cavity, the spring four is fixed in the assembly cavity, side holes and guide holes are opened on the side and front of the cabinet respectively, the inner surface of the side hole is movably sleeved with the locking column, and a sensing component is provided inside the positioning cavity.

[0012] Preferably, the lubrication box comprises a box body and a top plug, the top plug is threadedly sleeved on the top of the box body, and the lubrication box is communicated with the guide hole.

[0013] Preferably, the sensing component includes a pressure sensor, a positioning rod and a spring five, the pressure sensor is movably sleeved in the positioning cavity, the positioning rod is fixed at one end of the pressure sensor and movably sleeved in the cabinet, one end of the spring five is fixedly connected to the pressure sensor, and the other end is fixed in the positioning cavity.

[0014] A method for using a rear lower door closing and locking device of a high-voltage switch cabinet comprises the following steps:

[0015] In the first step, when closing the cabinet door, the cabinet door is pushed to close in the cabinet body through the hinge. As the cabinet door closes, the automatic locking component is squeezed and pushed, the automatic locking component is compressed, and the closing space of the cabinet door is staggered. When the cabinet door is closed, the spring 4 in the automatic locking component is elastically reset, and the locking column 2 is automatically inserted into the sleeve hole, completing the initial automatic locking;

[0016] Step 2: After the second locking column is inserted, the push block in the hydraulic push assembly is pushed, so that the push block drives the push rod to move horizontally. While the second spring is stretched, the piston plate compresses the hydraulic oil in the connecting chamber, and the hydraulic pressure in the middle hole is increased, and the auxiliary locking assembly connected inside is pushed to move. The outer end of the first locking column is inserted into the positioning cavity to complete the double locking, and at the same time, the electrical control rod is driven to move in the electrical locking part to connect the electrical parts;

[0017] Step 3: When the cabinet door needs to be opened, the unlocking assembly is pushed, and the unlocking assembly pushes the second locking column in a set of sleeve holes to be compressed and reset, so that the automatic locking assembly is moved out of the cabinet door, and with the elastic reset in the hydraulic pushing assembly, the auxiliary locking assembly is elastically reset and moved out of the positioning cavity, and the electrical control rod is synchronously actuated, the internal power of the electrical locking part is cut off, and the cabinet door is opened;

[0018] Step 4: When the cabinet door is closed, as the automatic locking assembly is squeezed and compressed, the locking head on the second locking column is compressed into the side hole, and the sponge ring is connected to the guide hole at this time, and the lubricating oil in the lubrication box quickly penetrates into the sponge ring. As the cabinet door is completely closed, the second locking column drives the locking head to automatically fit into the sleeve hole, and the inserted sponge ring penetrates the absorbed lubricating oil into the inner wall of the sleeve hole to complete a small amount of lubrication;

[0019] Step 5: When the cabinet door is closed and the electrical locking part and the auxiliary locking assembly fail, making it impossible for the auxiliary locking assembly to be inserted into the positioning cavity, the sensing assembly fails to sense the contact pressure of the auxiliary locking assembly and the alarm sounds in coordination with the alarm, indicating that the electrical locking part is not connected and active detection and repair are performed.

[0020] The beneficial effects of the present invention are as follows:

[0021] (1) The present invention utilizes an automatic locking component, an auxiliary locking component, and a hydraulic push component to automatically achieve double locking when the cabinet door is closed, thereby completing the stable locking of the cabinet door. In addition, the present invention cooperates with the electrical control rod in the auxiliary locking component to complete the electrical opening and closing control during the locking process, thereby ensuring that electrical operation can only be performed after the cabinet door is completely locked. In addition, the actual cabinet door locking operation is simple, the locking speed is fast, the stability is high, and the use effect is good.

[0022] (2) The present invention utilizes the locking head and sponge ring in the automatic locking assembly in conjunction with a lubrication box. During the closing process of the automatic locking assembly, the sponge ring in the locking head is squeezed into the connection with the lubrication box, and the lubricating oil is introduced and absorbed into the sponge ring. After the locking head is inserted into the sleeve hole of the cabinet door, the sponge ring is used to lubricate the inner wall of the sleeve hole, thereby reducing the occurrence of sticking and achieving automatic lubrication. The lubricating oil absorbed by the sponge ring is stably stored to avoid oil dripping. The lubrication stability is good, the pollution is small, and the use effect is good.

[0023] (3) The present invention reuses the auxiliary locking component in conjunction with a sensing component installed in the cabinet. After closing, the sensing component senses the contact pressure of the auxiliary locking component to determine whether the electrical locking part is open. In the event that the electrical locking part is not opened normally, pressure sensing is used to achieve real-time monitoring, and an alarm is used in conjunction with an alarm mechanism to generate an alarm, thereby achieving subsequent inspection and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the present invention;

[0025] Figure 2 This is a schematic diagram of the back of the cabinet door of the present invention;

[0026] Figure 3 It is a cross-sectional schematic diagram of the cabinet door and the cabinet body of the present invention;

[0027] Figure 4 for Figure 3 A schematic diagram of the structure enlargement at the center A;

[0028] Figure 5 This is a front view of the cabinet of the present invention;

[0029] Figure 6 for Figure 5 A schematic diagram of the structure enlarged at B in the middle;

[0030] Figure 7 is a cross-sectional schematic diagram of a cabinet door of the present invention;

[0031] Figure 8 for Figure 7 A schematic diagram of the structure enlarged at C in the middle;

[0032] Fig. 9 It is a cross-sectional schematic diagram of the cabinet of the present invention;

[0033] Fig.10 for Fig. 9 A schematic diagram of the structure at D in the middle is enlarged;

[0034] Fig.11 It is a cross-sectional schematic diagram of the cabinet door and the automatic locking assembly of the present invention;

[0035] Fig.12is a schematic diagram of the automatic locking assembly of the present invention;

[0036] Fig.13 It is an exploded schematic diagram of the locking head of the present invention;

[0037] Fig.14 is a schematic diagram of a lubrication box of the present invention;

[0038] Fig.15 is a schematic diagram of a hydraulic pushing assembly of the present invention;

[0039] Fig.16 is a schematic diagram of the auxiliary locking assembly of the present invention;

[0040] Fig.17 It is a schematic diagram of the unlocking component of the present invention.

[0041] In the figure: 1. cabinet door; 2. sleeve hole; 3. middle hole; 4. connecting cavity; 5. auxiliary locking component; 51. locking column one; 52. spring one; 53. slider; 54. electrical control rod; 6. hydraulic push component; 61. push block; 62. push rod; 63. piston plate; 64. spring two; 7. unlocking component; 71. movable column; 72. outer block; 73. middle rod; 74. spring three; 8. assembly cavity; 9. automatic locking component; 91. connecting plate; 92. spring four; 93. locking column two; 94. locking head; 95. sponge ring; 96. ring groove; 10. sensing component; 101. pressure sensor; 102. positioning rod; 103. spring five; 11. positioning cavity; 12. lubrication box; 13. electrical locking part; 14. slide groove; 15. guide hole; 16. side hole. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] like Figures 1 to 17As shown, the embodiment of the present invention provides a locking device for closing the rear lower door of a high-voltage switch cabinet and a method for using the same, comprising a cabinet door 1, an installation chamber is provided inside the cabinet door 1, and an auxiliary locking component 5, a hydraulic pushing component 6 and an unlocking component 7 are elastically installed in the installation chamber, an electrical locking part 13 is fixedly installed on the back of the cabinet door 1, the cabinet door 1 is installed in the cabinet body by means of a rubber material, an automatic locking component 9 and a pressure sensing component 10 are movably and elastically installed on the inner side of the cabinet body, a lubrication box 12 is fixedly provided on the front of the cabinet body, and an automatic locking component 13 is fixedly installed on the inner side of the cabinet body. The lock assembly 9 includes a connecting plate 91, a spring four 92, a locking column two 93, a locking head 94, a sponge ring 95 and an annular groove 96. There are two locking columns two 93, which are symmetrically fixed on the side of the connecting plate 91. The locking head 94 is fixed to the end of the locking column two 93. One end of the spring four 92 is fixedly connected to the connecting plate 91, and the other end is fixed in the inner wall of the cabinet. The annular groove 96 is opened on the outer surface of the locking head 94. The sponge ring 95 is fixedly sleeved in the annular groove 96. The locking column two 93 corresponds to the sleeve hole 2 one by one.

[0044] Embodiment 1: When closing the cabinet door 1, the cabinet door 1 is pushed to close in the cabinet body through the hinge. As the cabinet door 1 is closed, the automatic locking component 9 is squeezed and pushed, the automatic locking component 9 is compressed, and the closing space of the cabinet door 1 is staggered. When the cabinet door 1 is closed, the spring 4 92 in the automatic locking component 9 is elastically reset, and the locking column 2 93 is automatically inserted into the sleeve hole 2 to complete the initial automatic locking. When the locking column 2 93 is inserted, the push block 61 in the hydraulic push component 6 is pushed, so that the push block 61 drives the push rod 62 to move horizontally. While the spring 2 64 is stretched, the piston plate 63 compresses the hydraulic oil in the connecting chamber 4, and the liquid in the middle hole 3 is The pressure rises and pushes the auxiliary locking assembly 5 that is internally sleeved to operate. The outer end of the locking column 1 51 is inserted into the positioning cavity 11 to complete double locking, and at the same time drives the electrical control rod 54 to move in the electrical locking part 13 to connect the electrical parts. When the cabinet door 1 needs to be opened, the unlocking assembly 7 is pushed, and the unlocking assembly 7 pushes the locking column 2 93 in a set of sleeve holes 2 to be compressed and reset, so that the automatic locking assembly 9 is moved out of the cabinet door 1, and with the elastic reset in the hydraulic pushing assembly 6, the auxiliary locking assembly 5 is elastically reset and moved out of the positioning cavity 11, and the electrical control rod 54 is synchronously actuated, the power inside the electrical locking part 13 is cut off, and the cabinet door 1 is opened.

[0045] Firstly, by utilizing the automatic locking component 9, the auxiliary locking component 5 and the hydraulic pushing component 6, when the cabinet door 1 is closed, double locking is automatically achieved to achieve stable locking of the cabinet door 1, and in cooperation with the electrical control rod 54 in the auxiliary locking component 5, electrical opening and closing control is completed during the locking process to ensure that electrical operation can only be performed after the cabinet door 1 is completely locked, and the actual locking operation of the cabinet door 1 is simple, the locking speed is fast, the stability is high, and the use effect is good.

[0046] Embodiment 2: When the cabinet door 1 is closed, as the automatic locking assembly 9 is squeezed and compressed, the locking head 94 on the locking column 93 is compressed into the side hole 16, and the sponge ring 95 is connected with the guide hole 15 at this time, and the lubricating oil in the lubrication box 12 quickly seeps into the sponge ring 95. As the cabinet door 1 is completely closed, the locking column 93 drives the locking head 94 to automatically fit into the sleeve hole 2, and the inserted sponge ring 95 soaks the absorbed lubricating oil into the inner wall of the sleeve hole 2 to complete a small amount of lubrication.

[0047] Firstly, by utilizing the locking head 94 and the sponge ring 95 in the automatic locking assembly 9 in cooperation with the lubrication box 12, during the closing process of the automatic locking assembly 9, the sponge ring 95 in the locking head 94 is squeezed into the connection part of the lubrication box 12, and the lubricating oil is introduced and absorbed into the sponge ring 95. Therefore, after the locking head 94 is inserted into the sleeve hole 2 of the cabinet door 1, the sponge ring 95 is utilized to lubricate the inner wall of the sleeve hole 2, thereby reducing the occurrence of jamming and realizing automatic lubrication. The lubricating oil absorbed by the sponge ring 95 is stably stored to avoid oil dripping, and the lubrication stability is good, the pollution is small, and the use effect is good.

[0048] Example 3: When the cabinet door 1 is closed and the electrical locking part 13 and the auxiliary locking assembly 5 fail, making it impossible for the auxiliary locking assembly 5 to be inserted into the positioning cavity 11, the sensing assembly 10 fails to sense the contact pressure of the auxiliary locking assembly 5, and the alarm is sounded in cooperation with the alarm, indicating that the electrical locking part 13 is not connected, and active detection and repair are performed.

[0049] First, by reusing the auxiliary locking component 5 in cooperation with the sensing component 10 installed in the cabinet, the sensing component 10 is used to sense the contact pressure of the auxiliary locking component 5 after closing to determine whether the electrical locking part 13 is open. In the case where the electrical locking part 13 is not opened normally, pressure sensing is used to achieve real-time monitoring, and the alarm is realized in cooperation with the alarm mechanism to achieve subsequent inspection and maintenance.

[0050] The installation chamber includes a sleeve hole 2, a middle hole 3 and a connecting cavity 4. The sleeve hole 2, the middle hole 3 and the connecting cavity 4 are all opened in the cabinet door 1. The sleeve holes 2 are symmetrically distributed on the upper and lower sides of the middle hole 3. One end of the connecting cavity 4 is connected with a group of sleeve holes 2, and the other end is connected with the middle hole 3. A slide groove 14 is opened at the back of the cabinet door 1, and the slide groove 14 is connected with the middle hole 3. The auxiliary locking component includes a locking column 51, a spring 52, a slider 53 and an electrical control rod 54. The locking column 51 is movably sleeved in the middle hole 3. One end of the spring 52 is fixedly connected to the locking column 51, and the other end is fixed in the middle hole 3. The slider 53 is fixedly connected to the outer surface of the locking column 51 and slidably sleeved in the slide groove 14. One end of the electrical control rod 54 is fixed on the slider 53, and the other end is movably sleeved in the electrical locking part 13, and controls the electrical The locking part 13 is on and off, and the hydraulic pushing assembly 6 includes a push block 61, a push rod 62, a piston plate 63 and a spring 2 64. The push block 61 is fixedly connected to the push rod 62, and the other end of the push rod 62 is fixedly connected to the piston plate 63. The piston plate 63 is movably sleeved in the connecting chamber 4. One end of the spring 2 64 is fixedly connected to the push block 61, and the other end is fixed in the cabinet door 1. The push block 61 is located on the moving path of a group of locking columns 2 93. The unlocking assembly 7 includes a movable column 71, an outer block 72, an intermediate rod 73 and a spring 3 74. The movable column 71 is located in a sleeve hole 2 and is located on the moving path of the corresponding locking column 2 93. The outer block 72 is slidably sleeved on the front of the cabinet door 1, and the intermediate rod 73 is fixedly connected between the outer block 72 and the movable column 71. One end of the spring 3 74 is fixedly connected to the movable column 71, and the other end is fixedly connected in the sleeve hole 2.

[0051] By utilizing the installation chamber, the installation of the auxiliary locking assembly 5, the unlocking assembly 7 and the hydraulic pushing assembly 6 is achieved. The unlocking assembly 7 is used to release the lock of the auxiliary locking assembly 5, and the hydraulic pushing assembly 6 receives the push of the automatic locking assembly 9 to achieve the linkage locking of the auxiliary locking assembly 5.

[0052] Among them, an assembly cavity 8 is opened inside the cabinet, a positioning cavity 11 is opened on the inner side of the cabinet, a connecting plate 91 is movably sleeved in the assembly cavity 8, a spring four 92 is fixed in the assembly cavity 8, a side hole 16 and a guide hole 15 are respectively opened on the side and front of the cabinet, the inner surface of the side hole 16 is movably sleeved with the locking column two 93, and a sensing component 10 is arranged inside the positioning cavity 11.

[0053] The automatic locking component 9 is installed through the assembly cavity 8, the positioning cavity 11 realizes the assembly of the sensing component 10 and the positioning of the auxiliary locking component 5, the spring 92 is used for elastic reset, and the guide hole 15 introduces lubricating oil.

[0054] The lubrication box 12 includes a box body and a top plug. The top plug is threadedly sleeved on the top of the box body. The lubrication box 12 is communicated with the guide hole 15 .

[0055] The lubricating oil is led out through the lubrication box 12 to achieve the infiltration of the sponge ring 95, thereby completing continuous lubrication and avoiding jamming.

[0056] Among them, the sensing component 10 includes a pressure sensor 101, a positioning rod 102 and a spring five 103. The pressure sensor 101 is movably sleeved in the positioning cavity 11. The positioning rod 102 is fixed at one end of the pressure sensor 101 and movably sleeved in the cabinet. One end of the spring five 103 is fixedly connected to the pressure sensor 101, and the other end is fixed in the positioning cavity 11.

[0057] The sensing component 10 senses the contact pressure of the auxiliary locking component 5 through the pressure sensor 101 to achieve pressure sensing. The model of the pressure sensor 101 is Bosch BMP280.

[0058] A method for using a rear lower door closing and locking device of a high-voltage switch cabinet comprises the following steps:

[0059] In the first step, when closing the cabinet door 1, the cabinet door 1 is pushed to close in the cabinet body through the hinge. As the cabinet door 1 is closed, the automatic locking component 9 is squeezed and pushed, the automatic locking component 9 is compressed, and the closing space of the cabinet door 1 is staggered. When the cabinet door 1 is closed, the spring 92 in the automatic locking component 9 is elastically reset, and the locking column 93 is automatically inserted into the sleeve hole 2, completing the preliminary automatic locking;

[0060] Step 2: After the locking column 93 is inserted, the push block 61 in the hydraulic push assembly 6 is pushed, so that the push block 61 drives the push rod 62 to move horizontally. While the spring 64 is stretched, the piston plate 63 compresses the hydraulic oil in the connecting chamber 4, and the hydraulic pressure in the middle hole 3 is increased, and the auxiliary locking assembly 5 connected inside is pushed to move. The outer end of the locking column 51 is inserted into the positioning cavity 11 to complete the double locking, and at the same time, the electrical control rod 54 is driven to move in the electrical locking part 13 to connect the electrical parts;

[0061] Step 3: When the cabinet door 1 needs to be opened, the unlocking assembly 7 is pushed, and the unlocking assembly 7 pushes the locking column 2 93 in the set of holes 2 to be compressed and reset, so that the automatic locking assembly 9 is moved out of the cabinet door 1, and with the elastic reset in the hydraulic pushing assembly 6, the auxiliary locking assembly 5 is elastically reset and moved out of the positioning cavity 11, and the electrical control rod 54 is synchronously actuated, the electrical locking part 13 is powered off, and the cabinet door 1 is opened;

[0062] Step 4: When the cabinet door 1 is closed, as the automatic locking assembly 9 is squeezed and compressed, the locking head 94 on the locking column 93 is compressed into the side hole 16, and the sponge ring 95 is now connected with the guide hole 15, and the lubricating oil in the lubrication box 12 quickly penetrates into the sponge ring 95. As the cabinet door 1 is completely closed, the locking column 93 drives the locking head 94 to automatically fit into the sleeve hole 2, and the inserted sponge ring 95 penetrates the absorbed lubricating oil into the inner wall of the sleeve hole 2, completing a small amount of lubrication;

[0063] Step 5: When the cabinet door 1 is closed and the electrical locking part 13 and the auxiliary locking component 5 fail, making it impossible for the auxiliary locking component 5 to be inserted into the positioning cavity 11, the sensing component 10 fails to sense the contact pressure of the auxiliary locking component 5, and the alarm is sounded in cooperation with the alarm, indicating that the electrical locking part 13 is not connected, and active detection and repair are performed.

[0064] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A door closing and locking device for a rear lower door of a high-voltage switch cabinet, comprising a cabinet door (1), characterized in that: The cabinet door (1) has an installation chamber formed inside, in which an auxiliary locking component (5), a hydraulic pushing component (6) and an unlocking component (7) are elastically installed respectively; an electrical locking portion (13) is fixedly installed on the back of the cabinet door (1); the cabinet door (1) is installed in a cabinet body by means of a rubber material; an automatic locking component (9) and a pressure sensing component (10) are movably and elastically installed on the inner side surface of the cabinet body; a lubrication box (12) is fixedly installed on the front of the cabinet body; The automatic locking assembly (9) comprises a connecting plate (91), a spring four (92), a locking column two (93), a locking head (94), a sponge ring (95) and an annular groove (96). The number of the locking columns two (93) is two and they are symmetrically fixed on the side of the connecting plate (91). The locking head (94) is fixed to the end of the locking column two (93). One end of the spring four (92) is fixedly connected to the connecting plate (91) and the other end is fixed in the inner wall of the cabinet. The annular groove (96) is formed on the outer surface of the locking head (94). The sponge ring (95) is fixedly sleeved in the annular groove (96). The locking columns two (93) correspond to the sleeve holes (2) one by one.

2. A locking device for the rear lower door of a high-voltage switch cabinet according to claim 1, characterized in that: The installation chamber comprises a sleeve hole (2), a middle hole (3) and a connecting cavity (4); the sleeve hole (2), the middle hole (3) and the connecting cavity (4) are all provided in the cabinet door (1); the sleeve holes (2) are symmetrically distributed on the upper and lower sides of the middle hole (3); one end of the connecting cavity (4) is connected to a group of sleeve holes (2), and the other end is connected to the middle hole (3); a slide groove (14) is provided on the back of the cabinet door (1); the slide groove (14) is connected to the middle hole (3).

3. A locking device for the rear lower door of a high-voltage switch cabinet according to claim 2, characterized in that: The auxiliary locking assembly comprises a locking column (51), a spring (52), a slider (53) and an electrical control rod (54); the locking column (51) is movably sleeved in the middle hole (3); one end of the spring (52) is fixedly connected to the locking column (51) and the other end is fixed in the middle hole (3); the slider (53) is fixedly connected to the outer surface of the locking column (51) and slidably sleeved in the slide groove (14); one end of the electrical control rod (54) is fixed on the slider (53) and the other end is movably sleeved in the electrical locking part (13) to control the on and off of the electrical locking part (13).

4. A locking device for closing the lower rear door of a high-voltage switch cabinet according to claim 3, characterized in that: The hydraulic pushing assembly (6) comprises a pushing block (61), a pushing rod (62), a piston plate (63) and a second spring (64); the pushing block (61) is fixedly connected to the pushing rod (62); the other end of the pushing rod (62) is fixedly connected to the piston plate (63); the piston plate (63) is movably sleeved in the connecting cavity (4); one end of the second spring (64) is fixedly connected to the pushing block (61) and the other end is fixed in the cabinet door (1); the pushing block (61) is located on the moving path of a group of locking columns (93).

5. A locking device for the rear lower door of a high-voltage switch cabinet according to claim 4, characterized in that: The unlocking assembly (7) comprises a movable column (71), an outer block (72), an intermediate rod (73) and a spring three (74); the movable column (71) is located in a sleeve hole (2) and is located on the moving path of the corresponding locking column two (93); the outer block (72) is slidably sleeved on the front of the cabinet door (1); the intermediate rod (73) is fixedly connected between the outer block (72) and the movable column (71); one end of the spring three (74) is fixedly connected to the movable column (71) and the other end is fixedly connected to the sleeve hole (2).

6. A locking device for the rear lower door of a high-voltage switch cabinet according to claim 5, characterized in that: An assembly cavity (8) is provided inside the cabinet, a positioning cavity (11) is provided on the inner side surface of the cabinet, the connecting plate (91) is movably sleeved in the assembly cavity (8), the spring four (92) is fixed in the assembly cavity (8), a side hole (16) and a guide hole (15) are respectively provided on the side and front surface of the cabinet, the inner surface of the side hole (16) is movably sleeved with the locking column two (93), and a sensing component (10) is provided inside the positioning cavity (11).

7. A locking device for the rear lower door of a high-voltage switch cabinet according to claim 6, characterized in that: The lubrication box (12) comprises a box body and a top plug, wherein the top plug is threadedly sleeved on the top of the box body, and the lubrication box (12) is connected to the guide hole (15).

8. A locking device for closing the lower rear door of a high-voltage switch cabinet according to claim 7, characterized in that: The sensing component (10) comprises a pressure sensor (101), a positioning rod (102) and a spring five (103); the pressure sensor (101) is movably sleeved in the positioning cavity (11); the positioning rod (102) is fixed to one end of the pressure sensor (101) and movably sleeved in the cabinet; one end of the spring five (103) is fixedly connected to the pressure sensor (101) and the other end is fixed in the positioning cavity (11).

9. A method for using a closing and locking device for a rear lower door of a high-voltage switch cabinet according to any one of claims 1 to 8, characterized in that: The usage steps include the following: The first step is that when the cabinet door (1) is closed, the cabinet door (1) is pushed to close in the cabinet body through the hinge. As the cabinet door (1) is closed, the automatic locking component (9) is squeezed and pushed, the automatic locking component (9) is compressed, and the closing space of the cabinet door (1) is staggered. When the cabinet door (1) is closed, the spring four (92) in the automatic locking component (9) is elastically reset, and the locking column two (93) is automatically inserted into the sleeve hole (2), completing the initial automatic locking; Step 2: After the second locking column (93) is inserted, the push block (61) in the hydraulic push assembly (6) is pushed, so that the push block (61) drives the push rod (62) to move horizontally. While the second spring (64) is stretched, the piston plate (63) compresses the hydraulic oil in the connecting chamber (4), and the hydraulic pressure in the middle hole (3) is increased, and the auxiliary locking assembly (5) sleeved inside is pushed to operate. The outer end of the first locking column (51) is inserted into the positioning chamber (11), completing the double locking, and at the same time driving the electrical control rod (54) to move in the electrical locking part (13), connecting the electrical parts; Step 3: When the cabinet door (1) needs to be opened, the unlocking assembly (7) is pushed, and the unlocking assembly (7) pushes the locking column 2 (93) in the set of holes (2) to be compressed and reset, so that the automatic locking assembly (9) is moved out of the cabinet door (1), and with the elastic reset in the hydraulic pushing assembly (6), the auxiliary locking assembly (5) is elastically reset and moved out of the positioning cavity (11), and the electrical control rod (54) is synchronously actuated, the power inside the electrical locking part (13) is cut off, and the cabinet door (1) is opened; Step 4: When the cabinet door (1) is closed, as the automatic locking assembly (9) is squeezed and compressed, the locking head (94) on the second locking column (93) is compressed into the side hole (16), and the sponge ring (95) is now connected to the guide hole (15), and the lubricating oil in the lubrication box (12) quickly penetrates into the sponge ring (95). As the cabinet door (1) is completely closed, the second locking column (93) drives the locking head (94) to automatically fit into the sleeve hole (2), and the inserted sponge ring (95) soaks the absorbed lubricating oil into the inner wall of the sleeve hole (2), completing a small amount of lubrication; Step 5: When the cabinet door (1) is closed and the electrical locking part (13) and the auxiliary locking assembly (5) fail and the auxiliary locking assembly (5) cannot be inserted into the positioning cavity (11), the sensing assembly (10) fails to sense the contact pressure of the auxiliary locking assembly (5) and the alarm is sounded in cooperation with the alarm, indicating that the electrical locking part (13) is not connected and active detection and repair are performed.

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