A multilayer chip varistor

Abstract

The present invention relates to the technical field of varistors, and specifically to a multi-layer chip varistor, comprising a protective shell, a cover plate being detachably mounted on the top of the protective shell, a resistor body being mounted in the protective shell; the resistor body being a multi-layer chip varistor; a first slide, the slide being arranged below the longitudinal sides of the protective shell, a longitudinal positioning plate for longitudinally positioning the resistor body being arranged above the slide; transverse positioning plates being respectively arranged on the transverse sides of the protective shell, the transverse positioning plates positioning the resistor body transversely in the protective shell, and the resistor body being limited in multiple directions through the structure of a top plate, a longitudinal positioning plate, a transverse positioning plate and a stop block, even if the rubber pad is aged and deformed due to the increase in the use time, the resistor body can still be effectively limited in the protective shell to prevent the resistor body from moving in the protective shell and affecting the normal use of the resistor body.

Description

Technical Field

[0001] The invention relates to the technical field of varistor, in particular to a multilayer chip varistor. Background Art

[0002] Chip varistor is a type of varistor. It is an electric shock protection device made with zinc oxide nonlinear resistor element as the core. Zinc oxide nonlinear resistor element is a compound semiconductor element made of zinc oxide as the main material and adding a variety of other trace elements using ceramic technology.

[0003] The Chinese utility model patent with announcement number CN219778608U facilitates limiting the upper side of the multilayer varistor body by setting a movable rod, a movable plate, a spring, a pressure plate and a rubber plate, and under the action of the elastic force of the spring, the rubber block is tightly attached to the multilayer varistor body to avoid affecting the resistor limiting effect due to aging of the rubber block at high temperature.

[0004] However, it does not take into account the deformation of rubber due to aging, and the limiting function in only one direction cannot effectively achieve the limiting effect of the resistor body in the shell. Summary of the invention

[0005] The object of the present invention is to provide a multilayer chip varistor to solve the problems raised by the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A multilayer chip varistor, comprising:

[0008] A protective shell, wherein a cover plate is detachably mounted on the top of the protective shell, and a resistor body is mounted in the protective shell;

[0009] The resistor body is a multilayer chip varistor;

[0010] A first slide, the first slide is arranged below the longitudinal sides of the protective shell, and a longitudinal positioning plate for longitudinally positioning the resistor body is arranged above the first slide;

[0011] The protective shell is provided with lateral positioning plates on both sides thereof, the lateral positioning plates are used to position the resistor body in the protective shell in the lateral direction, and gears are provided on the outer sides of the lateral positioning plates, the gears drive the lateral positioning plates to slide;

[0012] Racks are installed on both sides of the first slide, and the racks are meshed with the gears for transmission;

[0013] A mounting plate, the mounting plate being mounted on the upper middle portion of the cover plate, and a second screw rod being rotatably mounted below the mounting plate;

[0014] A vertical positioning component, the vertical positioning component is sleeved on the second screw rod, the inner wall of the vertical positioning component is threadedly connected to the second screw rod, the outer wall cross-section of the vertical positioning component is set to be square, a square through hole is set in the upper middle part of the cover plate, and the vertical positioning component is vertically slidably connected to the through hole on the cover plate.

[0015] Furthermore, a plurality of wiring grooves for wiring the resistor body are provided on the side walls of the protective shell, and longitudinal guide rails are fixedly connected on both sides of the lower side of the protective shell, and a lifting groove is provided in the guide rails, and a top plate is vertically slidably connected above the guide rails, and a first rubber pad is provided on the upper surface of the top plate, and the top plate is connected to the bottom support of the resistor body through the first rubber pad, and lifting columns are fixedly connected at both ends of the lower side of the top plate, and the lifting columns are arranged in the lifting grooves, and the lifting columns are vertically slidably connected to the lifting grooves, and a plurality of limit blocks are fixedly connected on the inner wall of the lifting groove near the opening, and the limit blocks are stuck in the outer wall of the lifting column to limit the sliding direction and sliding distance of the lifting column, and a first spring is provided below the lifting column, and the two ends of the first spring are fixedly connected to the inner wall of the lifting groove and the lower side of the lifting column respectively.

[0016] Furthermore, the two ends of the guide rail are respectively slidably connected with the first slide, the top of the first slide is fixedly connected to the bottom of the longitudinal positioning plate, the longitudinal positioning plate is set to a trapezoid, the inner upper side of the longitudinal positioning plate is set to a hypotenuse, a second rubber pad is provided on the inner outer wall of the longitudinal positioning plate, the longitudinal positioning plate is clamped and connected to the resistor body through the second rubber pad, a second spring is provided on the outer side of the first slide, one end of the second spring is fixedly connected to the outer wall of the first slide, and the other end of the second spring is fixedly connected to the inner wall of the protective shell, and the first telescopic rods are respectively provided at both ends of the first slide facing the inner wall of the protective shell, and the two ends of the first telescopic rod are respectively fixedly connected to the inner wall of the protective shell and the end of the first slide.

[0017] Furthermore, a third rubber pad is provided on the inner outer wall of the transverse positioning plate, and the transverse positioning plate is clamped and positioned with the resistor body by the third rubber pad. A second slide is fixedly connected to the bottom of the transverse positioning plate, and a sliding limiting assembly is provided between the second slide and the inner wall of the protective shell. The middle part of the second slide is sleeved on the first screw rod, and the outer end of the first screw rod is fixed on the axis of the gear. The outer side of the gear is rotatably connected to the inner wall of the protective shell through the shaft, and the rack meshing with the gear is provided below the gear, and the rack is fixedly connected to the connecting rod, and the other end of the connecting rod is fixedly connected to the side wall of the first slide, and the height of the transverse positioning plate is lower than the height of the longitudinal positioning plate.

[0018] Furthermore, the longitudinal positioning plate is arranged on both sides of the top plate, and a movable groove is arranged below the longitudinal positioning plate, and the movable groove includes an upper and a lower part, the lower part of the movable groove is a straight groove penetrating the longitudinal positioning plate from the inside to the outside, and the upper part of the movable groove is a trapezoidal groove, and the upper outer side of the trapezoidal groove is arranged as a hypotenuse, and the upper part of the movable groove is arranged in the longitudinal positioning plate, and the two ends of the top plate are respectively fixedly connected with positioning rods, and the positioning rods are arranged in the movable groove, the positioning rods are horizontally slidably connected to the lower half of the movable groove, and the outer end of the positioning rods is slidably connected to the hypotenuse of the upper half of the movable groove, and the elastic potential energy of the first spring is greater than the elastic potential energy of the second spring.

[0019] Furthermore, heat dissipation copper sheets are respectively arranged on both sides of the cover plate, and connecting rings are respectively fixedly connected to both ends of the heat dissipation copper sheets. A plurality of columns are fixedly connected to the top of the cover plate, and the connecting rings are sleeved on the columns, and the connecting rings are slidably connected to the columns.

[0020] Furthermore, the four corners of the mounting plate are respectively fixedly connected to a fixing rod, the outer end portion of the fixing rod is fixedly connected to a ring, the ring is sleeved on the column, the ring is arranged above the connecting ring, a slide groove is provided on the side of the ring facing the fixing rod, a clamping column is horizontally slidably connected in the slide groove, a horizontal clamping groove is provided on the column, the clamping column is clamped in the clamping groove, the end of the clamping column in the slide groove is fixedly connected to a third spring, the other end of the third spring is fixedly connected to the inner wall of the slide groove, the end of the clamping column is fixedly connected to a connecting rope, the connecting rope passes through the mounting plate, the connecting rope passes through from above both sides of the mounting plate, and the upper end of the connecting rope is fixedly connected to a pull block.

[0021] Furthermore, a second screw rod is rotatably installed at the bottom of the mounting plate, and the second screw rod passes through the mounting plate above, and a rotating disk is fixedly connected to the upper end of the second screw rod, and the second screw rod vertically passes through the middle part of the cover plate, and the vertical positioning assembly is installed below the second screw rod, and a stop block is vertically slidably connected to the bottom of the vertical positioning assembly, and a fourth rubber pad is provided on the lower surface of the stop block, and the stop block positions the resistor body in the vertical direction through the fourth rubber pad, and a fourth spring is provided above the stop block, one end of the fourth spring is fixedly connected to the top of the stop block, and the other end of the fourth spring is fixedly connected to the bottom of the vertical positioning assembly, and a second telescopic rod is provided in the fourth spring, and the upper and lower ends of the second telescopic rod are respectively fixedly connected to the stop block and the inner wall of the vertical positioning assembly.

[0022] Furthermore, a lower support plate is fixedly connected to the side wall of the support block, and the lower support plates are provided with a plurality of lower support plates, which are respectively fixed on each surface of the support block, and an upper support plate is provided above the lower support plate, and the number and distribution of the upper support plates are exactly the same as those of the lower support plate, and the upper support plate is fixedly installed on the side wall of the vertical positioning assembly, and a plurality of third telescopic rods are provided between the upper support plate and the lower support plate, and the third telescopic rods are provided on the lower support plate and the upper support plate away from their axial positions, and the upper and lower ends of the third telescopic rods are respectively fixedly connected to the upper support plate and the lower support plate.

[0023] Furthermore, a lifting ring is sleeved on the third telescopic rod, and the lifting ring is vertically slidably connected to the third telescopic rod, a blocking block is fixedly connected to the top of the lifting ring, a storage groove is fixedly installed on the top of the upper support plate, an opening is provided below the storage groove, and the opening passes through the middle of the upper support plate, the blocking block is inserted into the storage groove and the opening of the upper support plate, a sealing ring is provided on the side wall of the blocking block, and the blocking block seals the opening through the sealing ring, an upper conical groove is fixedly connected to the bottom of the lifting ring, a lower conical groove is fixedly connected to the top of the lower support plate, and a glass ball is clamped between the lower conical groove and the upper conical groove.

[0024] Furthermore, a connecting plate is installed on the outer side of the lifting ring, and a plurality of thermistors are arranged below the connecting plate. The thermistors are positive temperature coefficient thermistors, and the thermistors can be connected in series with the resistor body.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. The present invention uses the structure of the top plate, the longitudinal positioning plate, the transverse positioning plate and the stop block to limit the resistor body in multiple directions. Even if the rubber pad ages and deforms due to the increase in use time, the resistor body can still be effectively limited in the protective shell to prevent the resistor body from moving in the protective shell and affecting the normal use of the resistor body;

[0027] 2. Through the structure of gears and racks, the transverse positioning plate moves synchronously during the process of clamping and releasing the resistor body by the longitudinal positioning plate, and because the height of the longitudinal positioning plate is higher than that of the transverse positioning plate, during the installation of the resistor, the longitudinal positioning plate is first squeezed open, and the transverse positioning plate is simultaneously driven to open, which is convenient for the rapid installation of the resistor. At the same time, when the resistor is installed, the top plate is squeezed to make the positioning rod slide to the lower half of the movable groove. When the longitudinal positioning plate is clamped inward, it presses against the positioning rod to prevent the top plate from pushing out the resistor during use. At the same time, only the longitudinal positioning plate needs to be pulled outward, and the top plate can squeeze the longitudinal positioning plate and the transverse positioning plate outward and push out the resistor, which is convenient for the rapid disassembly of the resistor;

[0028] 3. Through the structure of the glass ball, when the resistor is overloaded with heat and its carrying capacity is exceeded or self-ignited, the glass ball breaks, causing the sealing block to rush out from the opening below the storage tank, and the carbon dioxide gas in the storage tank rushes out, disconnecting the resistor and extinguishing the fire and cooling it down. At the same time, when the aging and deformation degree of the sealing gasket reaches a certain level, the distance pushed by the third spring to move the block is greater than the length of the sealing block. At this time, the sealing block also slides out from the opening, disconnecting the resistor, thereby preventing safety hazards caused by the continued use of the resistor. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0030] Figure 2 It is a cross-sectional structural schematic diagram of the present invention;

[0031] Figure 3 For the present invention Figure 2 The enlarged structural diagram at A in the middle;

[0032] Figure 4 It is a schematic diagram of the longitudinal section structure of the present invention;

[0033] Figure 5 For the present invention Figure 4 The enlarged structural diagram at B in the middle;

[0034] Figure 6 For the present invention Figure 5 The enlarged structural diagram at C in the middle;

[0035] Figure 7 It is a schematic diagram of the cross-sectional structure of the first slide of the present invention;

[0036] Figure 8 It is a schematic diagram of the cross-sectional structure of the guide rail of the present invention;

[0037] Fig. 9 For the present invention Figure 8 The enlarged structural diagram at D in the middle;

[0038] Fig.10 For the present invention Figure 8 The enlarged structural diagram at E in the middle;

[0039] Fig.11 It is a schematic diagram of the cross-sectional structure of the fixing rod of the present invention;

[0040] Fig.12 For the present invention Fig.11 The enlarged structural diagram at F in the middle;

[0041] Fig.13 It is a schematic diagram of the cross-sectional structure of the mounting plate of the present invention;

[0042] Fig.14 It is a schematic diagram of the cross-sectional structure of the second embodiment of the present invention;

[0043] Fig.15 For the present invention Fig.14 Enlarged structural diagram at G in the middle.

[0044] In the figure: 1. protective shell; 11. wiring slot; 2. guide rail; 21. lifting slot; 22. limit block; 3. top plate; 31. first rubber pad; 32. positioning rod; 33. lifting column; 34. first spring; 4. first slide; 41. longitudinal positioning plate; 42. second rubber pad; 43. second spring; 44. first telescopic rod; 45. connecting rod; 46. rack; 47. movable slot; 5. transverse positioning plate; 51. third rubber pad; 52. second slide; 53. first screw rod; 54. gear; 6. cover plate; 61. column; 7. heat dissipation copper sheet; 71. connecting ring; 8. installation Plate; 81, fixed rod; 82, collar; 83, clamping column; 84, third spring; 85, connecting rope; 86, pull block; 87, second screw rod; 88, rotating disk; 9, vertical positioning assembly; 91, stop block; 92, fourth rubber pad; 93, fourth spring; 94, second telescopic rod; 95, lower support plate; 96, upper support plate; 97, storage slot; 98, third telescopic rod; 99, lifting ring; 910, blocking block; 911, sealing ring; 912, upper conical groove; 913, lower conical groove; 914, glass ball; 915, connecting plate; 916, thermistor; 10, resistor body. DETAILED DESCRIPTION

[0045] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in an exemplary manner in conjunction with the accompanying drawings.

[0046] Embodiment 1:

[0047] See also Figures 1 to 13 The present invention provides a technical solution: a multilayer chip varistor, comprising a protective shell 1, a cover plate 6 is detachably installed on the top of the protective shell 1, and a resistor body 10 is installed in the protective shell 1;

[0048] The structure of the protective shell 1 protects the resistor body 10 installed in the protective shell 1 , and the cover plate 6 structure that can be removed from the protective shell 1 facilitates the removal of the resistor body 10 from the protective shell 1 .

[0049] The resistor body 10 is a multi-layer chip varistor;

[0050] A first slide 4, wherein the first slide 4 is arranged below the longitudinal sides of the protective shell 1, and a longitudinal positioning plate 41 for longitudinally positioning the resistor body 10 is arranged above the first slide 4;

[0051] The sliding structure of the first slide table 4 drives the longitudinal positioning plate 41 to slide horizontally, thereby realizing the longitudinal positioning of the resistor body 10 .

[0052] The protective shell 1 is provided with lateral positioning plates 5 on both lateral sides, and the lateral positioning plates 5 are used to position the resistor body 10 in the protective shell 1 in the lateral direction. A gear 54 is provided on the outer side of the lateral positioning plates 5, and the gear 54 drives the lateral positioning plates 5 to slide.

[0053] Racks 46 are installed on both sides of the first slide 4, and the racks 46 are meshed with the gears 54 for transmission;

[0054] The resistor body 10 is positioned laterally through the structure of the transverse positioning plate 5 , and the rack 46 and the gear 54 are driven to mesh and transmit through the sliding of the first slide 4 , so that the longitudinal positioning plate 41 can drive the transverse positioning plate 5 to be positioned synchronously.

[0055] A mounting plate 8, the mounting plate 8 is mounted on the upper middle portion of the cover plate 6, and a second screw rod 87 is rotatably mounted below the mounting plate 8;

[0056] A vertical positioning component 9 is sleeved on the second screw rod 87, the inner wall of the vertical positioning component 9 is threadedly connected to the second screw rod 87, the outer wall cross-section of the vertical positioning component 9 is set to be square, a square through hole is set in the upper middle part of the cover plate 6, and the vertical positioning component 9 is vertically slidably connected to the through hole on the cover plate 6.

[0057] By rotating the second screw rod 87 and under the rotation restriction of the cover plate 6 , the vertical positioning assembly 9 is controlled to slide vertically downward, so that the vertical positioning assembly 9 positions the resistor body 10 in the vertical direction.

[0058] A plurality of wiring slots 11 for wiring the resistor body 10 are provided on the side walls of the protective shell 1, and longitudinal guide rails 2 are fixedly connected to the lower sides of the protective shell 1, and a lifting slot 21 is provided in the guide rail 2. A top plate 3 is vertically slidably connected to the top of the guide rail 2, and a first rubber pad 31 is provided on the upper surface of the top plate 3. The top plate 3 is supported and connected to the bottom of the resistor body 10 through the first rubber pad 31, and lifting columns 33 are fixedly connected to the two ends of the lower side of the top plate 3, respectively. The lifting columns 33 are arranged in the lifting slot 21, and the lifting columns 33 are vertically slidably connected to the lifting slot 21. A plurality of limit blocks 22 are fixedly connected to the inner wall of the lifting slot 21 near the opening, and the limit blocks 22 are stuck in the outer wall of the lifting columns 33 to limit the sliding direction and sliding distance of the lifting columns 33. A first spring 34 is provided below the lifting column 33, and the two ends of the first spring 34 are fixedly connected to the inner wall of the lifting slot 21 and the lower side of the lifting column 33, respectively.

[0059] The resistor body 10 can be connected to the external circuit through the structure of the wiring slot 11. Under the elastic force of the first spring 34, the lifting column 33 is bounced upward in the initial state, that is, the top plate 3 is kept at the highest point, and the structure of the limit block 22 prevents the lifting column 33 from falling off the lifting slot 21, causing the top plate 3 to fall off. The structure of the first rubber pad 31 above the top plate 3 prevents the top plate 3 from directly contacting the resistor body 10, causing the resistance value of the resistor body 10 to change. After the object that hinders the top plate 3 is removed, the top plate 3 will push the resistor body 10 upward so that the resistor body 10 can be taken out of the protective shell 1.

[0060] The first slide 4 is slidably connected to both ends of the guide rail 2, and the top of the first slide 4 is fixedly connected to the bottom of the longitudinal positioning plate 41. The longitudinal positioning plate 41 is set to a trapezoid, and the inner upper side of the longitudinal positioning plate 41 is set to a hypotenuse. A second rubber pad 42 is provided on the inner outer wall of the longitudinal positioning plate 41, and the longitudinal positioning plate 41 is clamped and connected to the resistor body 10 through the second rubber pad 42. A second spring 43 is provided on the outer side of the first slide 4, one end of the second spring 43 is fixedly connected to the outer wall of the first slide 4, and the other end of the second spring 43 is fixedly connected to the inner wall of the protective shell 1, and first telescopic rods 44 are respectively provided at both ends of the first slide 4 on one side facing the inner wall of the protective shell 1, and the two ends of the first telescopic rod 44 are respectively fixedly connected to the inner wall of the protective shell 1 and the end of the first slide 4.

[0061] Under the elastic force of the second spring 43, the first slide 4 always has a tendency to slide inward. After the resistor body 10 is installed, the first slide 4 drives the longitudinal positioning plate 41 to clamp and fix the resistor body 10 inward in the longitudinal direction, and the structure of the second rubber pad 42 avoids direct contact between the longitudinal positioning plate 41 and the resistor body 10. Since the upper inner side of the longitudinal positioning plate 41 is set as a bevel, the resistor body 10 can be installed directly downward from the upper inner side of the longitudinal positioning plate 41, and the longitudinal positioning plate 41 is automatically squeezed to expand outward during the downward process, which facilitates the installation of the resistor body 10.

[0062] A third rubber pad 51 is provided on the inner outer wall of the transverse positioning plate 5, and the transverse positioning plate 5 is clamped and positioned with the resistor body 10 by the third rubber pad 51. A second slide 52 is fixedly connected to the bottom of the transverse positioning plate 5, and a sliding limiting assembly is provided between the second slide 52 and the inner wall of the protective shell 1. The middle part of the second slide 52 is sleeved on the first screw rod 53, and the outer end of the first screw rod 53 is fixed on the axis of the gear 54. The outer side of the gear 54 is rotatably connected to the inner wall of the protective shell 1 through an axis, and the rack 46 meshing with the gear 54 is provided below the gear 54. The rack 46 is fixedly connected to the connecting rod 45, and the other end of the connecting rod 45 is fixedly connected to the side wall of the first slide 4. The height of the transverse positioning plate 5 is lower than the height of the longitudinal positioning plate 41.

[0063] When the longitudinal positioning plate 41 clamps the resistor body 10, the longitudinal positioning plate 41 and the first slide 4 slide toward the middle of the protective shell 1, so that the rack 46 slides inwards and drives the gear 54 to rotate, thereby causing the first screw rod 53 to rotate. Under the action of the sliding limit assembly, the second slide 52 slides inwards horizontally, and the transverse positioning plate 5 clamps the resistor body 10 through the third rubber pad 51. Since the height of the transverse positioning plate 5 is lower than the longitudinal positioning plate 41, the resistor body 10 first contacts the upper bevel of the longitudinal positioning plate 41 during installation. When the resistor body 10 presses the longitudinal positioning plate 41 outwards, the rack 46 drives the gear 54 to rotate in the opposite direction, controlling the transverse positioning plate 5 to open at the same time.

[0064] When the resistor body 10 is disassembled, the longitudinal positioning plates 41 are pulled toward both sides, so that the longitudinal positioning plates 41 are opened toward both sides and the transverse positioning plates 5 are opened at the same time.

[0065] The longitudinal positioning plate 41 is arranged on both sides of the top plate 3, and a movable groove 47 is arranged below the longitudinal positioning plate 41, and the movable groove 47 includes an upper and a lower part, and the lower part of the movable groove 47 is a straight groove that penetrates the longitudinal positioning plate 41 from the inside to the outside, and the upper part of the movable groove 47 is a trapezoidal groove, and the upper outer side of the trapezoidal groove is arranged as a hypotenuse, and the upper parts of the movable grooves 47 are all arranged in the longitudinal positioning plate 41, and the two ends of the top plate 3 are respectively fixedly connected with positioning rods 32, and the positioning rods 32 are arranged in the movable groove 47, and the positioning rods 32 are horizontally slidably connected to the lower part of the movable groove 47, and the outer end of the positioning rod 32 is slidably connected to the hypotenuse of the upper part of the movable groove 47, and the elastic potential energy of the first spring 34 is greater than the elastic potential energy of the second spring 43.

[0066] When installing the resistor body 10, press the resistor body 10 downward to squeeze the top plate 3 to the lowest point. At this time, the positioning rods 32 on both sides slide to the lower half of the movable groove 47, and the longitudinal positioning plate 41 slides inward during the clamping process, so that the positioning rods 32 are inserted to the outside of the movable groove 47, and the positioning rods 32 abut against the inner wall of the longitudinal positioning plate 41. At this time, the top plate 3 will not bounce upward, so as to avoid the top plate 3 pushing up the resistor body 10 during use;

[0067] During disassembly, the longitudinal positioning plate 41 is pulled outward to move the positioning rod 32 to the common part of the upper and lower halves of the movable groove 47. At this time, the top plate 3 lifts the resistor body 10 upward, and because the elastic potential energy of the first spring 34 is greater than the elastic potential energy of the second spring 43, the positioning rod 32 passes through the hypotenuse inner wall of the movable groove 47. During the upward movement of the top plate 3, the longitudinal positioning plate 41 is pushed to both sides so that the resistor body 10 can be disassembled.

[0068] Heat dissipation copper sheets 7 are respectively arranged on both sides of the cover plate 6, and connecting rings 71 are respectively fixedly connected to both ends of the heat dissipation copper sheets 7. A plurality of columns 61 are fixedly connected to the top of the cover plate 6, and the connecting rings 71 are sleeved on the columns 61, and the connecting rings 71 are slidably connected to the columns 61.

[0069] The heat generated by the resistor body 10 is dissipated from the inside of the protective shell 1 to the outside through the structure of the heat dissipation copper sheet 7 .

[0070] The four corners of the mounting plate 8 are respectively fixedly connected with a fixing rod 81, and the outer end of the fixing rod 81 is fixedly connected with a collar 82, and the collar 82 is sleeved on the column 61, and the collar 82 is arranged above the connecting ring 71. The collar 82 is provided with a sliding groove on the side facing the fixing rod 81, and a clamping column 83 is horizontally slidably connected in the sliding groove. The column 61 is provided with a horizontal clamping groove, and the clamping column 83 is clamped with the clamping groove. The end of the clamping column 83 in the sliding groove is fixedly connected with a third spring 84, and the other end of the third spring 84 is fixedly connected to the inner wall of the sliding groove. The end of the clamping column 83 is fixedly connected with a connecting rope 85, and the connecting rope 85 penetrates into the mounting plate 8, and the connecting rope 85 penetrates from the upper part of the two sides of the mounting plate 8, and the upper end of the connecting rope 85 is fixedly connected with a pulling block 86.

[0071] Under the elastic force of the third spring 84, the card column 83 pops out horizontally into the card slot and engages with the card slot, so that the ring 82 is engaged with the column 61. Since the ring 82 is arranged above the connecting ring 71, at this time, the fixing rod 81 and the ring 82 fix the mounting plate 8 above the cover plate 6, and also fix the heat dissipation copper sheet 7 on the cover plate 6. Pull the pull blocks 86 on both sides upward, so that the pull blocks 86 drive the connecting rope 85 to retract inward, and drive the card column 83 to retract into the slide groove, so that the mounting plate 8 can be removed from above the cover plate 6, and the heat dissipation copper sheet 7 can be removed together.

[0072] A second screw rod 87 is rotatably installed at the bottom of the mounting plate 8, and the second screw rod 87 passes through the mounting plate 8 at the top, and a rotating disk 88 is fixedly connected to the upper end of the second screw rod 87. The second screw rod 87 vertically passes through the middle part of the cover plate 6, and the vertical positioning component 9 is installed below the second screw rod 87. A stop block 91 is vertically slidably connected to the bottom of the vertical positioning component 9. A fourth rubber pad 92 is provided on the lower surface of the stop block 91, and the stop block 91 positions the resistor body 10 in the vertical direction through the fourth rubber pad 92. A fourth spring 93 is provided above the stop block 91, and one end of the fourth spring 93 is fixedly connected to the top of the stop block 91, and the other end of the fourth spring 93 is fixedly connected to the bottom of the vertical positioning component 9. A second telescopic rod 94 is provided in the fourth spring 93, and the upper and lower ends of the second telescopic rod 94 are respectively fixedly connected to the stop block 91 and the inner wall of the vertical positioning component 9.

[0073] Rotate the rotating disk 88 to rotate the second screw rod 87. Since the second screw rod 87 is screwed to the vertical positioning assembly 9 and the inner wall of the cover plate 6 limits the rotation of the vertical positioning assembly 9, the vertical positioning assembly 9 moves vertically downward until the stop block 91 abuts against the top of the resistor body 10. At this time, the fourth spring 93 remains in a compressed state. As the resistor body 10 is used, the high temperature generated will soften and deform the fourth rubber pad 92 and the first rubber pad 31, resulting in a decrease in the fixing effect on the resistor body 10. At this time, under the elastic force of the fourth spring 93, the stop block 91 can still effectively position the resistor body 10. The second telescopic rod 94 limits the sliding direction and distance of the stop block 91 to prevent the stop block 91 from falling off.

[0074] A lower support plate 95 is fixedly connected to the side wall of the stop block 91, and a plurality of lower support plates 95 are provided. The lower support plates 95 are respectively fixed on each surface of the stop block 91, and an upper support plate 96 is provided above the lower support plate 95. The number and distribution of the upper support plates 96 are exactly the same as those of the lower support plate 95. The upper support plate 96 is fixedly installed on the side wall of the vertical positioning assembly 9, and a plurality of third telescopic rods 98 are provided between the upper support plate 96 and the lower support plate 95. The third telescopic rods 98 are arranged on the lower support plate 95 and the upper support plate 96 away from their axial positions, and the upper and lower ends of the third telescopic rod 98 are respectively fixedly connected to the upper support plate 96 and the lower support plate 95.

[0075] The structure of the third telescopic rod 98 allows relative sliding between the upper support plate 96 and the lower support plate 95. Even if the fourth rubber pad 92 softens and deforms, causing a change in the distance between the upper support plate 96 and the lower support plate 95, it will not affect their normal use.

[0076] A lifting ring 99 is sleeved on the third telescopic rod 98, and the lifting ring 99 is vertically slidably connected to the third telescopic rod 98. A blocking block 910 is fixedly connected to the top of the lifting ring 99. A storage groove 97 is fixedly installed on the top of the upper support plate 96. An opening is provided below the storage groove 97, and the opening passes through the middle of the upper support plate 96. The blocking block 910 is inserted into the storage groove 97 and the opening of the upper support plate 96. A sealing ring 911 is provided on the side wall of the blocking block 910, and the blocking block 910 seals the opening through the sealing ring 911. An upper conical groove 912 is fixedly connected to the bottom of the lifting ring 99, and a lower conical groove 913 is fixedly connected to the top of the lower support plate 95. A glass ball 914 is clamped between the lower conical groove 913 and the upper conical groove 912.

[0077] In the initial state, the glass ball 914 supports the upper conical groove 912, so that the lifting ring 99 is kept at the highest point of the third telescopic rod 98, ensuring that the blocking block 910 is at the opening, and the opening is sealed by the sealing ring 911 to prevent the carbon dioxide in the storage groove 97 from flowing out when the resistor body 10 is in normal use;

[0078] When the resistor body 10 spontaneously ignites or is overloaded, causing its temperature to reach a level where the glass ball 914 breaks, the glass ball 914 breaks, and under the action of the internal air pressure of the storage tank 97, the blocking block 910 slides vertically downward along the opening until the lifting ring 99 drives the blocking block 910 to completely move out of the opening. At this time, the carbon dioxide in the storage tank 97 is ejected outward, disconnecting the resistor body 10, and extinguishing the fire and cooling the temperature;

[0079] After the deformation of the fourth rubber pad 92 and the first rubber pad 31 reaches a certain value, and the distance change between the upper support plate 96 and the lower support plate 95 is greater than the length of the blocking block 910, the blocking block 910 slides out of the opening, and the carbon dioxide in the storage groove 97 also flows out, indicating that the resistor body 10 is scrapped.

[0080] Embodiment 2:

[0081] See also Figures 1 to 13 A connecting plate 915 is installed on the outer side of the lifting ring 99, and a plurality of thermistors 916 are arranged below the connecting plate 915. The thermistors 916 are positive temperature coefficient thermistors, and the thermistors 916 can be connected in series with the resistor body 10.

[0082] By setting the thermistor 916 on the outside of the lifting ring 99, when the internal temperature is too high, the lifting ring 99 moves toward the resistor body 10 until the thermistor 916 is connected in series with the resistor body 10, thereby increasing the overall resistance of the resistor body 10 and achieving a circuit-breaking effect.

[0083] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A multilayer chip varistor, characterized in that: include: A protective shell (1), a cover plate (6) being detachably mounted on the top of the protective shell (1), and a resistor body (10) being mounted inside the protective shell (1); The resistor body (10) is a multi-layer chip varistor; A first slide (4), the first slide (4) being arranged below both longitudinal sides of the protective shell (1), and a longitudinal positioning plate (41) for longitudinally positioning the resistor body (10) being arranged above the first slide (4); Transverse positioning plates (5) are respectively arranged on both lateral sides of the protective shell (1), and the transverse positioning plates (5) are used to position the resistor body (10) in the transverse direction within the protective shell (1). Gears (54) are arranged on the outside of the transverse positioning plates (5), and the gears (54) drive the transverse positioning plates (5) to slide. Racks (46) are installed on both sides of the first slide (4), and the racks (46) are meshed with the gears (54) for transmission; A mounting plate (8), the mounting plate (8) being mounted on the upper middle portion of the cover plate (6), and a second screw rod (87) being rotatably mounted below the mounting plate (8); A vertical positioning component (9), the vertical positioning component (9) being sleeved on the second screw rod (87), the inner wall of the vertical positioning component (9) being threadedly connected to the second screw rod (87), the outer wall cross section of the vertical positioning component (9) being arranged in a square shape, a square through hole being arranged in the middle of the upper part of the cover plate (6), the vertical positioning component (9) being vertically slidably connected to the through hole on the cover plate (6).

2. The multilayer chip varistor according to claim 1, characterized in that: A plurality of wiring slots (11) for wiring the resistor body (10) are arranged on the side wall of the protective shell (1), longitudinal guide rails (2) are fixedly connected to the two sides of the bottom of the protective shell (1), and lifting slots (21) are arranged in the guide rails (2). A top plate (3) is vertically slidably connected to the top of the guide rails (2), and a first rubber pad (31) is arranged on the upper surface of the top plate (3). The top plate (3) is connected to the bottom support of the resistor body (10) via the first rubber pad (31), and lifting columns (33) are fixedly connected to the two ends of the bottom of the top plate (3). The lifting column (33) is arranged in the lifting slot (21), and the lifting column (33) is vertically slidably connected to the lifting slot (21). A plurality of limit blocks (22) are fixedly connected to the inner wall of the lifting slot (21) near the opening, and the limit blocks (22) are inserted into the outer wall of the lifting column (33) to limit the sliding direction and sliding distance of the lifting column (33). A first spring (34) is arranged below the lifting column (33), and two ends of the first spring (34) are respectively fixedly connected to the inner wall of the lifting slot (21) and the bottom of the lifting column (33).

3. The multilayer chip varistor according to claim 2, characterized in that: The first slide table (4) is slidably connected to both ends of the guide rail (2), the upper part of the first slide table (4) is fixedly connected to the lower part of the longitudinal positioning plate (41), the longitudinal positioning plate (41) is arranged in a trapezoidal shape, the inner upper part of the longitudinal positioning plate (41) is arranged as a bevel, a second rubber pad (42) is arranged on the inner outer wall of the longitudinal positioning plate (41), the longitudinal positioning plate (41) is clamped and connected to the resistor body (10) through the second rubber pad (42), a second spring (43) is arranged on the outer side of the first slide table (4), one end of the second spring (43) is fixedly connected to the outer wall of the first slide table (4), and the other end of the second spring (43) is fixedly connected to the inner wall of the protective shell (1), and first telescopic rods (44) are respectively arranged at both ends of the first slide table (4) on one side facing the inner wall of the protective shell (1), and the two ends of the first telescopic rod (44) are respectively fixedly connected to the inner wall of the protective shell (1) and the end of the first slide table (4).

4. The multilayer chip varistor according to claim 3, characterized in that: A third rubber pad (51) is provided on the inner outer wall of the transverse positioning plate (5), and the transverse positioning plate (5) is clamped and positioned with the resistor body (10) by the third rubber pad (51). A second slide (52) is fixedly connected to the lower part of the transverse positioning plate (5), and a sliding limiting component is provided between the second slide (52) and the inner wall of the protective shell (1). The middle part of the second slide (52) is sleeved on the first screw rod (53), and the outer end of the first screw rod (53) is fixed on the axis of the gear (54). The outer side of the gear (54) is rotatably connected to the inner wall of the protective shell (1) through a shaft. The rack (46) meshing with the gear (54) is provided below the gear (54), and the rack (46) is fixedly connected to the connecting rod (45). The other end of the connecting rod (45) is fixedly connected to the side wall of the first slide (4). The height of the transverse positioning plate (5) is lower than the height of the longitudinal positioning plate (41).

5. The multilayer chip varistor according to claim 3, characterized in that: The longitudinal positioning plate (41) is arranged on both sides of the top plate (3). A movable groove (47) is arranged below the longitudinal positioning plate (41). The movable groove (47) includes an upper and a lower part. The lower part of the movable groove (47) is a straight groove that penetrates the longitudinal positioning plate (41) from the inside to the outside. The upper part of the movable groove (47) is a trapezoidal groove. The upper part of the outer side of the trapezoidal groove is arranged as a bevel. The upper part of the movable groove (47) is arranged in the longitudinal positioning plate (41). The two ends of the top plate (3) are respectively fixedly connected with positioning rods (32). The positioning rods (32) are arranged in the movable groove (47). The positioning rods (32) are horizontally slidably connected to the lower part of the movable groove (47), and the outer end of the positioning rod (32) is slidably connected to the bevel of the upper part of the movable groove (47). The elastic potential energy of the first spring (34) is greater than the elastic potential energy of the second spring (43).

6. The multilayer chip varistor according to claim 1, characterized in that: Heat dissipation copper sheets (7) are respectively provided on both sides of the cover plate (6), and connecting rings (71) are respectively fixedly connected at both ends of the heat dissipation copper sheets (7). A plurality of columns (61) are fixedly connected above the cover plate (6), and the connecting rings (71) are sleeved on the columns (61). The connecting rings (71) are slidably connected to the columns (61). The four corners of the mounting plate (8) are respectively fixedly connected to fixing rods (81), and the outer ends of the fixing rods (81) are fixedly connected to collars (82), and the collars (82) are sleeved on the columns (61). The collars (82) are arranged above the connecting rings (71). (82) A slide groove is provided on one side facing the fixed rod (81), and a clamping column (83) is horizontally slidably connected in the slide groove. A horizontal clamping groove is provided on the column (61), and the clamping column (83) is clamped in the clamping groove. The end of the clamping column (83) in the slide groove is fixedly connected to a third spring (84), and the other end of the third spring (84) is fixedly connected to the inner wall of the slide groove. The end of the clamping column (83) is fixedly connected to a connecting rope (85), and the connecting rope (85) passes through the mounting plate (8), and the connecting rope (85) passes through the upper part of the two sides of the mounting plate (8), and the upper end of the connecting rope (85) is fixedly connected to a pull block (86).

7. The multilayer chip varistor according to claim 6, characterized in that: A second screw rod (87) is rotatably mounted below the mounting plate (8), the second screw rod (87) passes through the mounting plate (8) from above, a rotating disk (88) is fixedly connected to the upper end of the second screw rod (87), the second screw rod (87) vertically passes through the middle of the cover plate (6), the vertical positioning assembly (9) is mounted below the second screw rod (87), a stop block (91) is vertically slidably connected to the lower surface of the stop block (91), a fourth rubber pad (92) is provided on the lower surface of the stop block (91), and the stop block (91) is fixedly mounted on the lower surface of the stop block (91) by a fourth rubber pad (92) The fourth rubber pad (92) positions the resistor body (10) in the vertical direction. A fourth spring (93) is arranged above the stop block (91). One end of the fourth spring (93) is fixedly connected to the top of the stop block (91), and the other end of the fourth spring (93) is fixedly connected to the bottom of the vertical positioning component (9). A second telescopic rod (94) is arranged inside the fourth spring (93). The upper and lower ends of the second telescopic rod (94) are respectively fixedly connected to the stop block (91) and the inner wall of the vertical positioning component (9).

8. The multilayer chip varistor according to claim 7, characterized in that: A lower support plate (95) is fixedly connected to the side wall of the stop block (91), and a plurality of lower support plates (95) are provided. The lower support plates (95) are respectively fixed to each surface of the stop block (91). An upper support plate (96) is provided above the lower support plate (95), and the number and distribution of the upper support plates (96) are completely consistent with those of the lower support plates (95). The upper support plate (96) is fixedly mounted on the side wall of the vertical positioning assembly (9), and a plurality of third telescopic rods (98) are provided between the upper support plate (96) and the lower support plate (95). The third telescopic rods (98) are provided at positions away from the axis of the lower support plate (95) and the upper support plate (96), and the upper and lower ends of the third telescopic rods (98) are respectively fixedly connected to the upper support plate (96) and the lower support plate (95).

9. The multilayer chip varistor according to claim 8, characterized in that: The third telescopic rod (98) is sleeved with a lifting ring (99), the lifting ring (99) is vertically slidably connected to the third telescopic rod (98), a sealing block (910) is fixedly connected above the lifting ring (99), a storage groove (97) is fixedly installed above the upper support plate (96), carbon dioxide gas is stored in the storage groove (97), an opening is provided below the storage groove (97), the opening passes through the middle of the upper support plate (96), and the sealing block (910) is inserted into the In the opening of the storage groove (97) and the upper support plate (96), a sealing ring (911) is provided on the side wall of the blocking block (910), and the blocking block (910) seals the opening through the sealing ring (911); an upper conical groove (912) is fixedly connected to the bottom of the lifting ring (99), and a lower conical groove (913) is fixedly connected to the top of the lower support plate (95); a glass ball (914) is clamped between the lower conical groove (913) and the upper conical groove (912).

10. The multilayer chip varistor according to claim 9, characterized in that: A connecting plate (915) is installed on the outer side of the lifting ring (99), and a plurality of thermistors (916) are arranged below the connecting plate (915). The thermistors (916) are positive temperature coefficient thermistors, and the thermistors (916) can be connected in series with the resistor body (10).

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