A pit type nitriding furnace capable of uniform nitriding

Abstract

The present application relates to the technical fields of well type nitriding furnace, and discloses a well type nitriding furnace capable of uniform nitriding, which comprises a nitriding furnace and a furnace cover, the outer part of the nitriding furnace is respectively provided with a lower die holder and an upper die holder, and the top of the nitriding furnace and the inner wall are respectively provided with a sealing groove and a first positioning groove; the drive motor control, the transmission turntable, the positioning rod outside the turntable, the sliding rod, the end connecting block and the positioning groove are used to make the rubber structure on the outer camber surface of the connecting block closely connect with the positioning groove of the inner wall of the nitriding furnace, so that the connection between the furnace cover and the nitriding furnace is more stable, the air pump can inflate the inside of the connecting block through the air pipe, the end telescopic blocks of the adjacent connecting blocks can be telescopic, the multiple connecting blocks and the telescopic blocks in the furnace cover are matched with each other, can closely connect with the first positioning groove on the inner wall of the nitriding furnace, and the sealing property of the connection between the nitriding furnace and the furnace cover is improved.

Description

Technical Field

[0001] This invention relates to the field of pit-type nitriding furnace technology, specifically a pit-type nitriding furnace capable of uniform nitriding. Background Technology

[0002] The pit-type nitriding furnace body is constructed of high-grade refractory bricks, reducing heat loss and saving energy. The pit-type nitriding furnace uses a high-grade heat-resistant steel fan, ensuring high temperature performance and a long service life.

[0003] However, existing pit-type nitriding furnaces use screw drives to lift and lower the furnace cover to seal the furnace. The furnace cover is sealed to the top of the furnace by extruding a sealing ring. When the extrusion pressure is too high, the sealing ring has a short service life, which makes it impossible to guarantee the sealing performance inside the furnace and affects the nitriding reaction inside the furnace. Summary of the Invention

[0004] The purpose of this invention is to provide a pit-type nitriding furnace that can uniformly nitride, which can realize the mechanized automatic opening and closing of the furnace cover and ensure the sealing of the connection between the nitriding furnace and the furnace cover.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a well-type nitriding furnace capable of uniform nitriding, comprising a nitriding furnace and a furnace cover. A lower mold base and an upper mold base are respectively provided on the exterior of the nitriding furnace. A sealing groove and a first positioning groove are respectively formed on the top and inner wall of the nitriding furnace. A connecting groove is formed on the inner wall of the furnace cover, and a sealing ring is fixedly installed on the inner wall of the connecting groove. A second positioning groove is formed at equal intervals on the outer circumference of the furnace cover. An air pump is fixedly installed on the top of the furnace cover. A turntable is rotatably connected inside the furnace cover. Positioning rods are inserted at equal intervals on the outer circumference of the turntable. A connecting block is fixedly installed at one end of each positioning rod. A drive motor is fixedly installed on the top of the inner wall of the furnace cover. The output end of the drive motor is fixedly connected to the rotating shaft at the top of the turntable. Sliding rods are slidably connected at equal intervals on the bottom of the inner wall of the furnace cover. Each sliding rod corresponds to one of the positioning rods. The air pump is connected to the connecting block via an air pipe. Telescopic blocks are provided at both ends of each connecting block.

[0006] Preferably, a servo motor is fixedly installed on one side of the top of the upper mold base, and adjustment grooves are respectively opened on both sides of the inner wall of the upper mold base.

[0007] Preferably, a lead screw and a guide rod are respectively connected through the two sets of adjustment slots, and the output end of the servo motor is fixedly connected to the end of the lead screw.

[0008] Preferably, each of the two sets of adjustment slots is slidably connected with an adjustment block, and the two sets of adjustment blocks are respectively sleeved on the outside of the lead screw and the guide rod, and the lead screw and the adjustment block are connected by a thread.

[0009] Preferably, the upper mold base rotates to one side of the top of the lower mold base, and the front of the lower mold base and the upper mold base are respectively equipped with locking mechanisms. The front of the upper mold base is provided with sliding grooves on both sides, and a pin seat is movably connected inside the sliding groove.

[0010] Preferably, a pin hole matching the pin seat is provided on one side of the top of the lower mold base, and a positioning spring is installed between the inner wall of the slide groove and the top of the pin seat.

[0011] Preferably, the turntable has positioning grooves at equal intervals on its top circumference, and the furnace cover has guide rails at equal intervals installed on its bottom inner wall. The two ends of the slide rod slide into the guide rails and the inner wall of the positioning grooves, respectively.

[0012] Preferably, the second positioning groove communicates with the first positioning groove, and the connecting block extends through the sealing ring into the inner wall of the first positioning groove.

[0013] Preferably, the outer arc surface of the connecting block is made of rubber, and the telescopic block has a hollow structure. The telescopic block and the connecting block together form a telescopic airbag structure.

[0014] Preferably, the sealing ring is engaged with the inner wall of the sealing groove.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] In this invention, the upper mold base and the lower mold base are movably connected to the front of the pin base. The pin base can be positioned by being inserted into the upper pin hole of the lower mold base through a positioning spring. This allows the upper mold base and the lower mold base to be locked together by a locking mechanism, and the upper mold base and the lower mold base can be released and unfolded. This allows the top cover of the nitriding furnace to be opened from the top, making it more convenient to maintain and clean the inside of the nitriding furnace.

[0017] This invention uses a screw drive to open and close the furnace cover and the top of the nitriding furnace. The sealing ring at the bottom of the furnace cover can be sealed and connected with the sealing groove at the top of the nitriding furnace. Under the control of the drive motor, the drive turntable is driven so that the external positioning rod of the turntable, in cooperation with the sliding rod, can push the end connecting block into the positioning groove. This allows the rubber structure on the outer arc surface of the connecting block to be tightly connected with the positioning groove on the inner wall of the nitriding furnace, making the connection between the furnace cover and the nitriding furnace more stable. The air pump can pressurize the inside of the connecting block through the air pipe, so that the telescopic blocks at the ends of adjacent connecting blocks can extend and retract to abut. This allows multiple sets of connecting blocks and telescopic blocks in the furnace cover to cooperate with each other and be tightly connected with the first positioning groove on the inner wall of the nitriding furnace, thereby increasing the sealing performance of the connection between the nitriding furnace and the furnace cover. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2This is a schematic diagram of the front structure of the present invention;

[0020] Figure 3 This is a schematic diagram of the side cross-sectional structure of the present invention;

[0021] Figure 4 This is a schematic diagram of the disassembled furnace cover structure in this invention;

[0022] Figure 5 This is a schematic diagram of the cross-sectional structure of the top of the furnace cover in this invention;

[0023] Figure 6 for Figure 2 A magnified view of the structure at point A in the middle;

[0024] Figure 7 for Figure 3 A magnified schematic diagram of the structure at point B in the middle;

[0025] Figure 8 for Figure 5 A magnified schematic diagram of the structure at point C.

[0026] In the diagram: 1. Lower mold base; 2. Upper mold base; 3. Nitriding furnace; 4. Furnace cover; 5. Servo motor; 6. Air pump; 7. Locking mechanism; 8. Turntable; 31. First positioning groove; 32. Sealing groove; 41. Connecting groove; 42. Sealing ring; 43. Second positioning groove; 51. Lead screw; 52. Guide rod; 53. Adjusting block; 54. Adjusting groove; 71. Slide groove; 72. Pin seat; 73. Positioning spring; 81. Positioning rod; 82. Connecting block; 83. Drive motor; 84. Positioning groove; 85. Slide rod; 86. Telescopic block. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. The described embodiments are only some embodiments of the present invention, and not all embodiments.

[0028] Example 1:

[0029] This embodiment describes a pit-type nitriding furnace capable of uniform nitriding, such as... Figures 1-4 As shown, a well-type nitriding furnace capable of uniform nitriding includes a nitriding furnace 3 and a furnace cover 4. A lower mold base 1 and an upper mold base 2 are respectively provided on the outside of the nitriding furnace 3. A sealing groove 32 and a first positioning groove 31 are respectively opened on the top and inner wall of the nitriding furnace 3. A connecting groove 41 is opened on the inner wall of the furnace cover 4. A sealing ring 42 is fixedly installed on the inner wall of the connecting groove 41. A second positioning groove 43 is opened at equal intervals on the outer circumference of the furnace cover 4.

[0030] The upper mold base 2 and the lower mold base 1 are movably connected to the pin seat 72 on the front. The pin seat 72 can be positioned by being inserted into the upper pin hole of the lower mold base 1 through the positioning spring 73. This allows the upper mold base 2 and the lower mold base 1 to be locked together by the locking mechanism 7. This enables the upper mold base 2 and the lower mold base 1 to be released from the positioning and unfolded. This allows the top cover 4 of the nitriding furnace 3 to be opened from the top, making it more convenient to maintain and clean the inside of the nitriding furnace 3.

[0031] A servo motor 5 is fixedly installed on one side of the top of the upper mold base 2. Adjustment grooves 54 are respectively opened on both sides of the inner wall of the upper mold base 2. A lead screw 51 and a guide rod 52 are respectively connected through the two sets of adjustment grooves 54. The output end of the servo motor 5 is fixedly connected to the end of the lead screw 51. Adjustment blocks 53 are slidably connected in the two sets of adjustment grooves 54. The two sets of adjustment blocks 53 are respectively sleeved on the outside of the lead screw 51 and the guide rod 52, and the lead screw 51 and the adjustment blocks 53 are connected by threads. The lead screw 51 is driven to rotate by the servo motor 5. The adjustment blocks 53 fixedly connected on both sides of the furnace cover 4 can move up and down under the cooperation of the lead screw 51 and the guide rod 52, so that the opening and closing of the furnace cover 4 and the nitriding furnace 3 is controlled by automated machinery.

[0032] The upper mold base 2 rotates to one side of the top of the lower mold base 1. Locking mechanisms 7 are respectively installed on the front of the lower mold base 1 and the upper mold base 2. Slide grooves 71 are respectively opened on both sides of the front of the upper mold base 2. A pin seat 72 is movably connected inside the slide groove 71. A pin hole matching the pin seat 72 is opened on one side of the top of the lower mold base 1. A positioning spring 73 is installed between the inner wall of the slide groove 71 and the top of the pin seat 72. The pin seat 72 can be inserted and positioned into the pin hole of the lower mold base 1 through the positioning spring 73. In this way, the upper mold base 2 and the lower mold base 1 are locked together by the locking mechanism 7, and the upper mold base 2 and the lower mold base 1 can be released and unfolded. This allows the furnace cover 4 on the top of the nitriding furnace 3 to be opened from the top, which makes it easier to maintain and clean the inside of the nitriding furnace 3.

[0033] Example 2:

[0034] Based on Example 1, this example introduces a pit-type nitriding furnace capable of uniform nitriding, such as... Figure 5-8 As shown, an air pump 6 is fixedly installed on the top of the furnace cover 4. A turntable 8 is rotatably connected inside the furnace cover 4. Positioning rods 81 are inserted at equal intervals on the outer circumference of the turntable 8. A connecting block 82 is fixedly installed at one end of the positioning rod 81. A drive motor 83 is fixedly installed on the top of the inner wall of the furnace cover 4. The output end of the drive motor 83 is fixedly connected to the top rotating shaft of the turntable 8. Sliding rods 85 are slidably connected at equal intervals at the bottom of the inner wall of the furnace cover 4. The sliding rods 85 are connected to the positioning rods 81 one by one. The air pump 6 is connected to the connecting block 82 through an air pipe. There are telescopic blocks 86 at both ends of the connecting block 82.

[0035] The furnace cover 4 and the top of the nitriding furnace 3 are opened and closed by the screw 51. The sealing ring 42 at the bottom of the furnace cover 4 can be sealed and connected with the sealing groove 32 at the top of the nitriding furnace 3. Under the control of the drive motor 83, the drive turntable 8 is driven so that the external positioning rod 81 of the turntable 8, with the cooperation of the slide rod 85, can push the end connecting block 82 into the positioning groove. This allows the rubber structure on the outer arc surface of the connecting block 82 to be tightly connected with the positioning groove on the inner wall of the nitriding furnace 3, making the connection between the furnace cover 4 and the nitriding furnace 3 more stable. The air pump 6 can pressurize the inside of the connecting block 82 through the air pipe, so that the telescopic blocks 86 at the ends of the adjacent connecting blocks 82 can extend and retract to abut. This allows multiple sets of connecting blocks 82 and telescopic blocks 86 in the furnace cover 4 to cooperate with each other and be tightly connected with the first positioning groove 31 on the inner wall of the nitriding furnace 3, thereby increasing the sealing performance of the connection between the nitriding furnace 3 and the furnace cover 4.

[0036] The turntable 8 has positioning grooves 84 evenly spaced on the top circumference of the turntable 8, and guide rails are evenly spaced on the bottom of the inner wall of the furnace cover 4. The two ends of the slide rod 85 slide into the guide rails and the inner wall of the positioning grooves 84, respectively. The second positioning groove 43 is connected to the first positioning groove 31. The turntable 8 is controlled to rotate by the drive motor 83, so that the external positioning rod 81 of the turntable 8, with the cooperation of the slide rod 85, can push the end connecting block 82 into the positioning groove. This allows the rubber structure on the outer arc surface of the connecting block 82 to be tightly connected with the positioning groove on the inner wall of the nitriding furnace 3, making the connection between the furnace cover 4 and the nitriding furnace 3 more stable.

[0037] The connecting block 82 extends through the sealing ring 42 into the inner wall of the first positioning groove 31. The outer arc surface of the connecting block 82 is made of rubber, and the telescopic block 86 is a hollow structure. The telescopic block 86 and the connecting block 82 form a telescopic airbag structure. The sealing ring 42 is snapped into the inner wall of the sealing groove 32. The air pump 6 can pressurize the inside of the connecting block 82 through the air pipe, so that the telescopic blocks 86 at the ends of adjacent connecting blocks 82 can extend and retract to contact each other. This allows multiple sets of connecting blocks 82 and telescopic blocks 86 in the furnace cover 4 to cooperate with each other and be tightly connected to the first positioning groove 31 on the inner wall of the nitriding furnace 3, thereby increasing the sealing performance of the connection between the nitriding furnace 3 and the furnace cover 4.

[0038] Working principle: During use, the upper mold base 2 and the lower mold base 1 are movably connected by the pin seat 72. The pin seat 72 can be positioned by the positioning spring 73 and the upper pin hole of the lower mold base 1. This allows the upper mold base 2 and the lower mold base 1 to be locked together by the locking mechanism 7. This allows the upper mold base 2 and the lower mold base 1 to be released from the positioning and unfolded. This allows the top cover 4 of the nitriding furnace 3 to be opened from the top, making it easier to maintain and clean the inside of the nitriding furnace 3.

[0039] When sealing and assembling the top cover 4 of the nitriding furnace 3, the servo motor 5 controls the lead screw 51 to drive the cover 4 to open and close with the top of the nitriding furnace 3, and the bottom sealing ring 42 of the cover 4 can be sealed and connected with the top sealing groove 32 of the nitriding furnace 3.

[0040] Then, under the control of the drive motor 83, the drive turntable 8 is driven so that the external positioning rod 81 of the turntable 8, in cooperation with the slide rod 85, can push the end connecting block 82 into the positioning groove. This allows the rubber structure on the outer arc surface of the connecting block 82 to be tightly connected with the positioning groove on the inner wall of the nitriding furnace 3, making the connection between the furnace cover 4 and the nitriding furnace 3 more stable. The air pump 6 can pressurize the inside of the connecting block 82 through the air pipe, so that the telescopic blocks 86 at the ends of the adjacent connecting blocks 82 can extend and retract to abut. This allows multiple sets of connecting blocks 82 and telescopic blocks 86 in the furnace cover 4 to cooperate with each other and be tightly connected with the first positioning groove 31 on the inner wall of the nitriding furnace 3, thereby increasing the sealing of the connection between the nitriding furnace 3 and the furnace cover 4.

[0041] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes and modifications can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pit-type nitriding furnace capable of uniform nitriding, comprising a nitriding furnace (3) and a furnace cover (4), characterized in that: The nitriding furnace (3) is provided with a lower mold base (1) and an upper mold base (2) on its exterior. The top and inner wall of the nitriding furnace (3) are respectively provided with a sealing groove (32) and a first positioning groove (31). The inner wall of the furnace cover (4) is provided with a connecting groove (41). A sealing ring (42) is fixedly installed on the inner wall of the connecting groove (41). The outer circumference of the furnace cover (4) is provided with a second positioning groove (43) at equal intervals. An air pump (6) is fixedly installed on the top of the furnace cover (4). A turntable (8) is rotatably connected inside the furnace cover (4). The outer circumference of the turntable (8) is provided with... Positioning rods (81) are inserted at equal intervals. A connecting block (82) is fixedly installed at one end of the positioning rod (81). A drive motor (83) is fixedly installed at the top of the inner wall of the furnace cover (4). The output end of the drive motor (83) is fixedly connected to the top rotating shaft of the turntable (8). Sliding rods (85) are slidably connected at equal intervals at the bottom of the inner wall of the furnace cover (4). The sliding rods (85) are connected to the positioning rods (81) one by one. The air pump (6) is connected to the connecting block (82) through an air pipe. There are telescopic blocks (86) at both ends of the connecting block (82). The turntable (8) has positioning grooves (84) spaced at equal intervals on its top circumference. The furnace cover (4) has guide rails spaced at equal intervals on its inner wall bottom. The two ends of the slide rod (85) slide to the guide rails and the inner wall of the positioning grooves (84) respectively. The sealing ring (42) is engaged in the inner wall of the sealing groove (32).

2. The pit-type nitriding furnace capable of uniform nitriding according to claim 1, characterized in that: A servo motor (5) is fixedly installed on one side of the top of the upper mold base (2), and adjustment grooves (54) are respectively opened on both sides of the inner wall of the upper mold base (2).

3. A pit-type nitriding furnace capable of uniform nitriding according to claim 2, characterized in that: Two sets of adjustment grooves (54) are respectively connected by lead screws (51) and guide rods (52), and the output end of the servo motor (5) is fixedly connected to the end of the lead screw (51).

4. A pit-type nitriding furnace capable of uniform nitriding according to claim 3, characterized in that: Two sets of adjustment grooves (54) are slidably connected with adjustment blocks (53). The two sets of adjustment blocks (53) are respectively sleeved on the outside of the lead screw (51) and the guide rod (52), and the lead screw (51) and the adjustment blocks (53) are connected by threads.

5. A pit-type nitriding furnace capable of uniform nitriding according to claim 4, characterized in that: The upper mold base (2) rotates on one side of the top of the lower mold base (1). The lower mold base (1) and the upper mold base (2) are respectively equipped with locking mechanisms (7). The upper mold base (2) has sliding grooves (71) on both sides of its front side. The sliding grooves (71) are connected to pin seats (72) through the sliding grooves (71).

6. A pit-type nitriding furnace capable of uniform nitriding according to claim 5, characterized in that: The lower mold base (1) has a pin hole on one side of its top that matches the pin seat (72), and a positioning spring (73) is installed between the inner wall of the slide groove (71) and the top of the pin seat (72).

7. A pit-type nitriding furnace capable of uniform nitriding according to claim 1, characterized in that: The second positioning groove (43) is in communication with the first positioning groove (31), and the connecting block (82) extends through the sealing ring (42) into the inner wall of the first positioning groove (31).

8. A pit-type nitriding furnace capable of uniform nitriding according to claim 7, characterized in that: The outer arc surface of the connecting block (82) is made of rubber, and the telescopic block (86) is a hollow structure. The telescopic block (86) and the connecting block (82) together form a telescopic airbag structure.

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