A safe box-type substation
By employing two independent long rod locking designs on the cabinet door of the prefabricated substation, combined with the movement mechanism of the cylindrical block and the round rod, the problems of easy illegal opening of the lock and easy destruction of the key hole are solved, achieving higher security and concealment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- BINZHOU TONGLIAN ELECTRIC APPLIANCE CO LTD
- Filing Date
- 2024-07-30
- Publication Date
- 2026-07-03
AI Technical Summary
The locks on existing prefabricated substations are easily opened illegally, and the exposed keyholes are easily damaged.
The cabinet door is locked using two independent long rods, and the design of cylindrical blocks, round rods, and inner top rods makes the lock hole concealed when locked, and it is difficult to open even if someone tries to stuff in debris.
It improves the security of locks, prevents unauthorized opening, increases the difficulty of unlocking, and avoids damage to locks.
Smart Images
Figure CN118622075B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to substations, and more particularly to a safe prefabricated substation. Background Technology
[0002] The utility model patent with authorization announcement number CN218265437U discloses a pre-installed substation anti-theft door lock. The lock box 1 of the above solution is provided with a gear 2, and the gear 2 is surrounded by a first sliding plate 3, a second sliding plate 4 and a third sliding plate 5.
[0003] In the locked state, the first spring 23 drives the first slider 3 to the locked position, thereby extending the latch 7 to achieve lateral locking; the second spring 24 drives the second slider 4 to the locked position, thereby extending the lower locking rod 9 to achieve lower locking; and the third spring 25 drives the third slider 5 to the locked position, thereby extending the upper locking rod 10 to achieve upper locking.
[0004] When the lock needs to be opened, the key core 11.2 extends from the keyhole 6 into the gear 2, so that the slot 13 aligns with the protrusion 12 and the key core 11.2 aligns with the gear 2. Then, the key core 11.2 is rotated, which drives the gear 2 to rotate clockwise. This causes the first slide 3 to move to the right, the second slide 4 to move up, and the third slide 5 to move down, thereby causing the bolt 7 to move to the right and retract, the lower locking rod 9 to move up and retract, and the upper locking rod 10 to move down and retract, thus opening the lock.
[0005] The above solution uses gears to simultaneously drive the first sliding plate 3, the second sliding plate 4, and the third sliding plate 5, enabling the locking tongue, the upper locking rod, and the lower locking rod to lock simultaneously from three directions, thus making the locking state more stable. However, the above solution still has the following problems during use:
[0006] 1. Since the gear rotation will simultaneously drive the first slide 3, the second slide 4 and the third slide 5 to move and open the lock, if someone moves the bolt 7 with a card or other object while the lock is locked, the bolt 7 will also drive the gear 2 to rotate, which will then open the second slide 4 and the third slide 5, and finally open the lock.
[0007] 2. Since prefabricated substations are generally located outdoors, there are many pedestrians passing by. The lock hole 6 on the lock cover 1.2 is exposed. Some malicious people may stuff debris into the lock hole 6, making it difficult for the key cylinder 11.2 to be inserted into the lock hole 6, thus damaging the lock. Summary of the Invention
[0008] In view of the above situation, the present invention provides a safe prefabricated substation, which can solve the problems existing in the above patent.
[0009] The technical solution includes a rectangular shell, a cylindrical body fixed to the rear end face of the shell cavity, and a closed front end face of the cylindrical body; a cylindrical block that can move back and forth is inside the cavity of the cylindrical body, the cylindrical block is always subjected to a forward force, and there is a cylindrical protrusion on the front end face of the cylindrical block, the protrusion penetrating the front end face of the cylindrical body.
[0010] Multiple round rods are evenly distributed around the circumference of the cylindrical block. The round rods can move inward and outward and are always subjected to an outward force. The outer ends of the round rods can extend out of the cylindrical block and insert into the cylinder, so that the position of the cylindrical block is fixed.
[0011] The cylindrical block has multiple internal push rods that move back and forth evenly distributed around its circumference. The front end of each internal push rod penetrates the cylinder. When the internal push rod moves backward, it causes the cylindrical rod to move inward. When the cylindrical rod moves outward, it causes the internal push rod to move forward. When the cylindrical block is in contact with the front end of the cylinder, the cylindrical rod is inserted into the cylinder, and the internal push rod is flush with the front end face of the cylinder.
[0012] The protrusion has a circular rod that can move back and forth; moving the circular rod backward can cause it to move outward.
[0013] There is a long rod on each side of the rear of the cavity of the shell. The two long rods are placed vertically and can move up and down. The outer ends of the two long rods are in opposite positions and are both outside the shell. The two long rods are always subjected to an outward force. The cylindrical block moves backward, which can make the two long rods move into the shell at the same time. After the long rods move into the shell, the outer ends of the cylindrical rods are inserted into the cylinder.
[0014] The invention also includes a key that moves the inner top rod backward and the circular rod backward.
[0015] This invention uses two independent long rods to lock the cabinet door, and the locking is achieved at both the top and bottom of the cabinet door, making it difficult for one person to unlock. In the locked state, there is no obvious keyhole on the cabinet door. Even if someone discovers that the inner top rod can be moved and stuffs debris inside, the inner top rod will push the debris out under the action of the round rod, thus preventing the lock from being damaged. Attached Figure Description
[0016] Figure 1 This is the front view of the present invention.
[0017] Figure 2 for Figure 1 The main sectional view with the cylindrical block and telescopic rod removed.
[0018] Figure 3 for Figure 1 Top sectional view.
[0019] Figure 4 for Figure 3 A magnified view of a portion of point A in the middle.
[0020] Figure 5This is a top sectional view of the lock in the unlocked state as described in this invention.
[0021] Figure 6 for Figure 5 A magnified view of a section at point B in the middle.
[0022] Figure 7 This is a top view of the cylindrical block in this invention.
[0023] Figure 8 for Figure 7 Top sectional view.
[0024] Figure 9 A three-dimensional view of the round rod and inner top rod mounted on the cylindrical block.
[0025] Figure 10 This is a top view of the key in this invention.
[0026] Figure 11 This is a top sectional view of the key in this invention.
[0027] Figure 12 This is a perspective view of the key in this invention.
[0028] Figure 13 This is a front view of the long rod and rectangular sleeve in this invention.
[0029] Figure 14 for Figure 13 Front sectional view.
[0030] Figure 15 for Figure 13 A three-dimensional image.
[0031] Figure 16 Insert a rectangular block into the three-dimensional sectional view of the cylinder.
[0032] Figure 17 This is a perspective view of the present invention. Detailed Implementation
[0033] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.
[0034] Depend on Figures 1 to 17 The present invention includes a rectangular shell 1, a cylindrical body 2 fixed on the rear end face of the cavity of the shell 1, and the front end face of the cylindrical body 2 is closed; there is a cylindrical block 3 that can move back and forth inside the cavity of the cylindrical body 2, the cylindrical block 3 is always subjected to a forward force, and there is a cylindrical protrusion 4 on the front end face of the cylindrical block 3, the protrusion 4 penetrates the front end face of the cylindrical body 2.
[0035] Multiple round rods 5 are evenly distributed around the circumference of the cylindrical block 3. The round rods 5 can move inward and outward and are always subjected to an outward force. The outer end of the round rod 5 can extend out of the cylindrical block 3 and be inserted into the cylinder 2, so that the position of the cylindrical block 3 is fixed.
[0036] The cylindrical block 3 has multiple inner push rods 6 that move back and forth evenly distributed around its circumference. The front end of the inner push rod 6 penetrates the cylinder 2. When the inner push rod 6 moves backward, it causes the round rod 5 to move inward. When the round rod 5 moves outward, it causes the inner push rod 6 to move forward. When the cylindrical block 3 is in contact with the front end of the cylinder 2, the round rod 5 is inserted into the cylinder 2, and the inner push rod 6 is flush with the front end face of the cylinder 2.
[0037] The protrusion 4 has a circular rod 7 that can move back and forth. The circular rod 7 can move backward to make the circular rod 5 move outward.
[0038] There is a long rod 8 on each side of the rear side of the cavity of the shell 1. The two long rods 8 are placed vertically and can move vertically. The outer ends of the two long rods 8 are in opposite positions and are both placed outside the shell 1. The two long rods 8 are always subjected to an outward force. The cylindrical block 3 moves backward, which can make the two long rods 8 move into the shell 1 at the same time. After the long rods 8 move into the shell 1, the outer end of the round rod 5 is inserted into the cylinder 2.
[0039] The invention also includes a key that moves the inner top rod 6 backward and the circular rod 7 backward.
[0040] The cylindrical block 3 has a circular cavity 13 inside. The inner end of the rod 5 is placed inside the circular cavity 13 and a first disk 14 is fixed to the inner end of the rod 5. The first disk 14 moves inside and outside the circular cavity 13 without separating from the circular cavity 13. A spring is fitted on the rod 5. One end of the spring is fixed to the first disk 14 and the other end is fixed to the circular cavity 13. The spring makes the rod 5 always subject to an outward force.
[0041] Each inner push rod 6 is fixed with a ring. The cylindrical block 3 has a hole in the front-back direction. The ring on the inner push rod 6 is placed in the hole on the cylindrical block 3, so that the inner push rod 6 can move back and forth on the cylindrical block 3 without detaching from the cylindrical block 3.
[0042] The round rod 5 has a notch, and one side of the notch is a slope. When the inner push rod 6 moves inward, its end presses against the round rod 5 through the slope on the notch, causing the round rod 5 to move inward.
[0043] A ring is fixed on the circular rod 7. The cylindrical block 3 has a long, narrow circular hole in the front-to-back direction. The ring on the circular rod 7 is placed in the long, narrow circular hole on the cylindrical block 3, so that the circular rod 7 can move back and forth in the cylindrical block 3 without detaching from the cylindrical block 3. The rear end of the circular rod 7 is tapered. The tapered end of the circular rod 7 is placed in the circular cavity 13. The circular rod 7 moves backward and presses the first disk 14 at the inner end of the circular rod 5 through the tapered end, so that multiple circular rods 5 move outward at the same time.
[0044] The front end of the circular rod 7 is fixed with a second disc 19. The front end face of the cylindrical block 3 has a blind hole corresponding to the second disc 19. A spring is fitted on the circular rod 7 and placed in the elongated circular hole on the cylindrical block 3. The spring causes the circular rod 7 to be subjected to a backward force so that its conical end is always in contact with the multiple first discs 14. When the circular rod 5 moves outward so that its outer end is inserted into the cylinder 2, the spring causes the second disc 19 on the circular rod 7 to be placed in the blind hole and the second disc 19 to be flush with the front end face of the cylindrical block 3.
[0045] The key includes a handle 15, with multiple outer push rods 16 evenly distributed around one end of the handle 15. The outer push rods 16 can be inserted into the cylinder 2 and the cylindrical block 3 to move the inner push rod 6 backward. Inside the multiple outer push rods 16 is a pressing rod 17 that is inserted into the handle 15 and moves back and forth on the handle 15. The pressing rod 17 can pass through the front end face of the cylinder 2 to move the circular rod 7 backward.
[0046] The outer push rod 16 is an arc-shaped rod with an arc-shaped cross-section, and the inner push rod 6 is also an arc-shaped rod with an arc-shaped cross-section;
[0047] The handle 15 is a circular rod with an elongated circular hole inside the rod in the direction of movement of the extrusion rod 17. The extrusion rod 17 passes through the elongated circular hole and a ring is fixed on the extrusion rod 17. The ring is placed inside the elongated circular hole to prevent the extrusion rod 17 from detaching from the handle 15. A spring is fitted on the extrusion rod 17 and placed inside the elongated circular hole. One end of the spring is fixed to the ring on the extrusion rod 17, and the other end of the spring is fixed inside the elongated circular hole. The spring causes the extrusion rod 17 to be subjected to a forward force. When the extrusion rod 17 is not subjected to a backward force, the rear end face of the extrusion rod 17 is placed in front of the rear end face of the outer push rod 16.
[0048] A telescopic rod 9 is fixed to the rear side of the cylinder 2. One end of the telescopic rod 9 is fixed to the shell 1, and the other end of the telescopic rod 9 is fixed to the cylindrical block 3. A spring is fitted on the telescopic rod 9, and the spring causes the cylindrical block 3 to always be subjected to a forward moving force.
[0049] The long rod 8 is a rod with a rectangular cross-section. The end of the long rod 8 extending out of the housing 1 is inclined. A rectangular block 10 is fixed to the end of the long rod 8 placed inside the housing 1. The inner end face of the rectangular block 10 is inclined. The inclined end of the rectangular block 10 passes through the cylinder 2 and is placed inside the cavity of the cylinder 2. There is an arc-shaped block 11 on each side of the rear side of the cylindrical block 3. The cylindrical block 3 moves backward and is pressed by the arc-shaped block 11 against the inclined surface on the rectangular block 10, so that the two long rods 8 move into the housing 1 at the same time.
[0050] Each of the long rods 8 has a rectangular sleeve 12 fitted at its end. The rectangular sleeve 12 is fixed to the upper and lower end faces of the housing 1. A spring is installed between the rectangular sleeve 12 and the long rod 8. The spring gives the long rod 8 a force to move it outward from the housing 1.
[0051] The inner edge of the cylinder 2 has two sets of blind holes 18. After the round rod 5 moves outward, it is inserted into the blind hole 18 to fix the cylindrical block 3 inside the cylinder 2.
[0052] In use, the invention is installed on the cabinet door of the box-type substation. For ease of installation, during processing, the front end face of the cylinder 2 extends out of the front end face of the housing 1. A round hole is pre-drilled on the cabinet door, the cylinder 2 is inserted into the round hole and the front end face of the cylinder 2 is flush with the front end face of the cabinet door. At the same time, the front end face of the housing 1 is attached to the inner side of the cabinet door, thus fixing the invention on the cabinet door.
[0053] The locking state of the present invention is as follows: Figure 3 As shown, the front end face of the cylindrical block 3 is attached to the cylinder 2. In this state, multiple round rods 5 move outward under the action of springs. The outer end of the round rod 5 extends out of the cylindrical block 3 and inserts into the blind hole 18 at the front end, fixing the cylindrical block 3 to the front side of the cylinder 2. At the same time, the round rod 5 presses the inner push rod 6 through the inclined surface of its notch, causing the inner push rod 6 to move forward and making the front end face of the inner push rod 6 flush with the front end face of the cylinder 2. The spring causes the round rod 7 to be subjected to a backward force, so that its conical end contacts multiple first discs 14, and the second disc 19 on the round rod 7 is placed in the blind hole and the second disc 19 is flush with the front end face of the cylindrical block 3. In this state, the cylindrical block 3 does not contact the long rod 8. The length of the long rod 8 is set so that the ends of the two long rods 8 extend out of the upper and lower ends of the cabinet door in this state. Since the ends of the two long rods 8 are both inclined surfaces, the cabinet door is then rotated, causing the inclined surfaces of the ends of the two long rods 8 to press against the cabinet body, causing the long rods 8 to move into the shell 1. After the long rod 8 passes over the cabinet, it moves outward under the action of the spring inside the rectangular sleeve 12, so that the end of the long rod 8 is placed inside the cabinet, thus fixing the cabinet door. Since the cabinet door is fixed to the cabinet by two long rods 8, and the two long rods 8 are independent of each other, if someone inserts a card into the upper or lower side of the cabinet and moves the long rod 8 into the housing 1 through the inclined surface of the long rod 8, the operation must be performed at both the upper and lower positions of the cabinet door at the same time. It is difficult for one person to perform the above operation, and two people must do it, which greatly increases the difficulty of opening the cabinet door. Moreover, in the locked state, the front end face of the inner top rod 6 is flush with the front end face of the cylinder 2. From the outside, there is no key hole on the cabinet door, which is highly concealed. Even if someone discovers the inner top rod 6 and moves the inner top rod 6 inward through the debris, after the force applied to the debris disappears, the inner top rod 6 will also reset under the squeezing action of the inclined surface of the round rod 5, pushing the debris out. In this way, it is difficult to stuff debris in.
[0054] When the cabinet door needs to be opened, the outer push rod 16 is inserted into the cylinder 2 via the handle 15. The outer push rod 16 presses against the inner push rod 6, causing the inner push rod 6 to move backward. At the same time, the inner push rod 6 moves the round rod 5 inward via the inclined surface on the round rod 5, causing the outer end of the round rod 5 to disengage from the blind hole 18, and causing the round rod 7 to move forward. Then, the outer push rod 16 pushes the cylindrical block 3 backward within the cylinder 2. Afterward, the arc-shaped block 11 on the rear side of the cylindrical block 3 presses against the inclined surfaces on the rectangular blocks 10 on both sides, causing the two long rods 8 to move simultaneously into the housing 1, disengaging the outer ends of the long rods 8 from the cabinet body, thus opening the cabinet door. Figure 5 As shown; in this state, the hand holding the handle 15 does not loosen, and the other hand presses the extrusion rod 17, causing the extrusion rod 17 to move backward to extrude the circular rod 7. The circular rod 7 moves the circular rod 5 outward through its conical end, so that the outer end of the circular rod 5 is inserted into the multiple blind holes 18 on the rear side, fixing the cylindrical block 3 on the rear side of the cylinder 2, keeping the long rod 8 in the state of being extruded by the arc block 11. When the circular rod 5 moves outward, the circular rod 5 drives the inner push rod 6 to move forward.
[0055] After completing the operation inside the cabinet, press the handle 15 backward again. The outer push rod 16 will move the inner push rod 6 backward again, causing the round rod 5 to move inward and disengage from the blind hole 18. The cylindrical block 3 will move forward under the action of the rear spring, and the arc block 11 will disengage from the inclined surface of the rectangular block 10. The long rod 8 will move outward and extend out of the cabinet door under the action of the spring. Then, rotate the cabinet door so that the end of the long rod 8 is placed inside the cabinet, and lock the cabinet door again.
[0056] This invention uses two independent long rods 8 to lock the cabinet door, and the locking is achieved through the upper and lower ends of the cabinet door, making it difficult for one person to unlock. In the locked state, there is no obvious key hole on the cabinet door. Even if someone discovers that the inner top rod 6 can move and stuffs debris inside, the inner top rod 6 will push the debris out under the action of the round rod 5, thus preventing the lock from being damaged.
Claims
1. A safe prefabricated substation, characterized in that, It includes a door lock structure, which includes a rectangular shell (1), a cylindrical body (2) fixed on the rear end face of the cavity of the rectangular shell (1), and the front end face of the cylindrical body (2) is closed; there is a cylindrical block (3) that can move back and forth inside the cavity of the cylindrical body (2), the cylindrical block (3) is always subjected to a forward force, and there is a cylindrical protrusion (4) on the front end face of the cylindrical block (3), the protrusion (4) penetrates the front end face of the cylindrical body (2); Multiple rods (5) are evenly distributed around the circumference of the cylindrical block (3). The rods (5) can move inward and outward and are always subjected to an outward force. The outer end of the rod (5) can extend out of the cylindrical block (3) and be inserted into the cylinder (2), so that the position of the cylindrical block (3) is fixed. The cylindrical block (3) has multiple inner push rods (6) that move back and forth evenly distributed around its circumference. The front end of the inner push rod (6) penetrates the cylinder (2). When the inner push rod (6) moves backward, it can cause the round rod (5) to move inward. When the round rod (5) moves outward, it causes the inner push rod (6) to move forward. When the cylindrical block (3) is in contact with the front end of the cylinder (2), the round rod (5) is inserted into the cylinder (2), and the inner push rod (6) is flush with the front end face of the cylinder (2). The protrusion (4) has a circular rod (7) that can move back and forth. When the circular rod (7) moves backward, the circular rod (5) can move outward. There is a long rod (8) on each side of the rear side of the cavity of the rectangular shell (1). The two long rods (8) are placed vertically and can move vertically. The outer ends of the two long rods (8) are opposite and are both placed outside the rectangular shell (1). The two long rods (8) are always subjected to an outward force. The cylindrical block (3) moves backward so that the two long rods (8) can move into the rectangular shell (1) at the same time. After the long rods (8) move into the rectangular shell (1), the outer end of the round rod (5) is inserted into the cylinder (2). It also includes a key that moves the inner top rod (6) backward and the key that moves the round rod (7) backward; The cylindrical block (3) has a circular cavity (13) inside. The inner end of the rod (5) is placed in the circular cavity (13) and the inner end of the rod (5) is fixed with a first disc (14). The first disc (14) moves inside and outside the circular cavity (13) and does not separate from the circular cavity (13). A spring is fitted on the rod (5). One end of the spring is fixed to the first disc (14) and the other end is fixed to the circular cavity (13). The spring makes the rod (5) always subject to an outward force. Each inner push rod (6) is fixed with a ring. The cylindrical block (3) has a hole in the front and back direction. The ring on the inner push rod (6) is placed in the hole on the cylindrical block (3), so that the inner push rod (6) can move back and forth on the cylindrical block (3) without leaving the cylindrical block (3). The round rod (5) has a notch, and one side of the notch is a slope. When the inner top rod (6) moves inward, its end presses against the round rod (5) through the slope on the notch, causing the round rod (5) to move inward. A ring is fixed on the circular rod (7), and there is a long strip-shaped circular hole in the cylindrical block (3) in the front-to-back direction. The ring on the circular rod (7) is placed in the long strip-shaped circular hole on the cylindrical block (3), so that the circular rod (7) can move back and forth in the cylindrical block (3) without leaving the cylindrical block (3). The rear end of the circular rod (7) is conical. The conical end of the circular rod (7) is placed in the circular cavity (13). The circular rod (7) moves backward and squeezes the first disk (14) at the inner end of the circular rod (5) through the conical end, so that multiple circular rods (5) move outward at the same time. The key includes a handle (15), with multiple outer push rods (16) evenly distributed around one end of the handle (15). The outer push rods (16) can be inserted into the cylinder (2) and the cylindrical block (3) to move the inner push rod (6) backward. Inside the multiple outer push rods (16) is a pressing rod (17) that is inserted into the handle (15) and moves back and forth on the handle (15). The pressing rod (17) can pass through the front end face of the cylinder (2) to move the circular rod (7) backward. The front end of the circular rod (7) is fixed with a second disc (19). The front end face of the cylindrical block (3) has a blind hole corresponding to the second disc (19). A spring is fitted on the circular rod (7) and placed in the long circular hole on the cylindrical block (3). The spring causes the circular rod (7) to be subjected to a backward force so that its conical end is always in contact with multiple first discs (14). When the circular rod (5) moves outward so that its outer end is inserted into the cylinder (2), the spring causes the second disc (19) on the circular rod (7) to be placed in the blind hole and the second disc (19) to be flush with the front end face of the cylindrical block (3). The long rod (8) is a rod with a rectangular cross-section. The end of the long rod (8) extending out of the rectangular shell (1) is a slope. A rectangular block (10) is fixed to the end of the long rod (8) placed inside the rectangular shell (1). The inner end face of the rectangular block (10) is a slope. The slope end of the rectangular block (10) passes through the cylinder (2) and is placed inside the cavity of the cylinder (2). There is an arc block (11) on each side of the rear side of the cylindrical block (3). The cylindrical block (3) moves backward and squeezes the slope on the rectangular block (10) through the arc block (11), so that the two long rods (8) move into the rectangular shell (1) at the same time. When in use, the door lock structure is installed on the cabinet door of the box-type substation. For ease of installation, during processing, the front end of the cylinder (2) extends out of the front end of the rectangular shell (1). A round hole is pre-drilled on the cabinet door, the cylinder (2) is inserted into the round hole and the front end of the cylinder (2) is flush with the front end of the cabinet door. At the same time, the front end of the rectangular shell (1) is attached to the inner side of the cabinet door, and the door lock structure is fixed on the cabinet door.
2. The safety-type prefabricated substation according to claim 1, characterized in that, The outer top rod (16) is an arc-shaped rod with an arc-shaped cross-section, and the inner top rod (6) is also an arc-shaped rod with an arc-shaped cross-section; The handle (15) is a round rod. The round rod has an elongated round hole in the direction of movement of the extrusion rod (17). The extrusion rod (17) passes through the elongated round hole. A ring is fixed on the extrusion rod (17). The ring is placed in the elongated round hole so that the extrusion rod (17) does not detach from the handle (15). A spring is fitted on the extrusion rod (17) and placed in the elongated round hole. One end of the spring is fixed on the ring of the extrusion rod (17), and the other end of the spring is fixed in the elongated round hole. The spring causes the extrusion rod (17) to be subjected to a forward force. When the extrusion rod (17) is not subjected to a backward force, the rear end face of the extrusion rod (17) is placed in front of the rear end face of the outer push rod (16).
3. The safety-type prefabricated substation according to claim 1, characterized in that, A telescopic rod (9) is fixed to the rear side of the cylindrical body (2). One end of the telescopic rod (9) is fixed to the rectangular shell (1), and the other end of the telescopic rod (9) is fixed to the cylindrical block (3). A spring is fitted on the telescopic rod (9), and the spring causes the cylindrical block (3) to always be subjected to a forward force.
4. The safety-type prefabricated substation according to claim 3, characterized in that, Each of the long rods (8) has a rectangular sleeve (12) fitted at its end. The rectangular sleeve (12) is fixed to the upper and lower end faces of the rectangular shell (1). A spring is installed between the rectangular sleeve (12) and the long rod (8). The spring gives the long rod (8) a force that moves it outward from the rectangular shell (1).
5. The safety-type prefabricated substation according to claim 4, characterized in that, The inner edge of the cylinder (2) has two sets of blind holes (18). After the round rod (5) moves outward, it is inserted into the blind hole (18) to fix the cylindrical block (3) inside the cylinder (2).