Temperature control circulating system for tool liquid nitrogen subzero treatment

Abstract

The utility model relates to the technical field of tool liquid nitrogen subzero treatment, and discloses a temperature control circulating system for tool liquid nitrogen subzero treatment, which solves the problem that the opening and closing of an air vent are difficult to control at present, and comprises a subzero barrel, a door body is hinged to the outer side of the subzero barrel, and a plurality of temperature sensors are mounted in the subzero barrel at equal angles; an adjusting mechanism is arranged on the cryogenic cylinder and comprises a negative pressure cylinder fixed in the cryogenic cylinder, a plurality of air outlet pipes are fixedly connected to the bottom of the negative pressure cylinder at equal angles, a plurality of air outlet holes are formed in the bottom of the negative pressure cylinder at equal angles, and a plurality of sealing rings are fixedly connected to the inner bottom wall of the negative pressure cylinder at equal angles; the inner diameter values of the sealing ring and the air outlet pipe are equal to the inner diameter value of the air outlet hole; according to the utility model, when the adjusting ring descends to be attached to each sealing ring, each air outlet hole can be blocked, and when the adjusting ring ascends to be separated from each sealing ring, each air outlet hole can be opened, so that the opening and closing of the air outlet holes can be conveniently controlled.

Description

Technical Field

[0001] This utility model belongs to the field of liquid nitrogen cryogenic treatment technology for cutting tools, specifically a temperature control circulation system for liquid nitrogen cryogenic treatment of cutting tools. Background Technology

[0002] Cryogenic treatment is crucial to the effectiveness of liquid nitrogen cryogenic treatment. For cutting tools, cryogenic treatment can improve material stability, reduce harmful stress, and thus extend tool life. According to patent document CN212006341U, entitled "A Liquid Nitrogen Cryogenic Device with Internal Circulation System in a Cooling Cabinet," a negative pressure ring is used. When nitrogen is injected, it first enters the negative pressure ring, vaporizes within it, and then evenly enters the cabinet after filling the entire ring. This reduces the possibility of direct contact between liquid nitrogen and the workpiece, which could cause localized rapid cooling and affect workpiece quality. Simultaneously, it improves the uniformity of cooling within the cabinet. However, the following drawbacks still exist:

[0003] It drives the rotating shaft to rotate by pushing the assist rod, so that the valve port on the valve disc is connected to the vent, allowing nitrogen to enter the cabinet to perform deep cryogenic treatment on the workpiece. However, this method is prone to causing the assist rod to rotate arbitrarily due to external force, making it difficult to control the opening and closing of the vent. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, this utility model provides a temperature control circulation system for deep cryogenic treatment of cutting tools with liquid nitrogen, which effectively solves the problem of difficulty in controlling the opening and closing of the vent.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a temperature control circulation system for deep cryogenic treatment of cutting tools using liquid nitrogen, including a cryogenic cylinder, a door hinged to the outside of the cryogenic cylinder, multiple temperature sensors installed at equal angles inside the cryogenic cylinder, and an adjustment mechanism provided on the cryogenic cylinder;

[0006] The adjustment mechanism includes a negative pressure cylinder fixed inside the cryogenic cylinder. Multiple vent pipes are fixedly connected to the bottom of the negative pressure cylinder at equal angles, and multiple vent holes are provided at equal angles on the bottom of the negative pressure cylinder. Multiple sealing rings are fixedly connected to the inner bottom wall of the negative pressure cylinder at equal angles. The inner diameter of the sealing rings and vent pipes is equal to the inner diameter of the vent holes, and each sealing ring and vent pipe corresponds to a vent hole. Two limiting rods are symmetrically fixedly connected between the top of the negative pressure cylinder and the cryogenic cylinder. Limiting plates are movably sleeved on the outer sides of the two limiting rods. An adjusting ring is fixedly connected between the bottom of the two limiting plates, and the adjusting ring is located on top of each sealing ring. A screw is rotatably connected to the inner bottom wall of the negative pressure cylinder. A lifting plate is threaded onto the outer side of the screw and fixed between the two limiting plates. A drive shaft is fixedly connected to the top of the screw. The top of the drive shaft extends to the outer side of the cryogenic cylinder and is fixedly connected to a turntable, and the drive shaft is rotatably connected to the cryogenic cylinder.

[0007] Preferably, the top of the cryogenic cylinder is provided with a sealed bearing, which is sleeved on the outside of the drive shaft.

[0008] Preferably, an L-shaped plate is fixedly connected to the top of the cryogenic cylinder, a drive shaft passes through the L-shaped plate and is rotatably connected to the L-shaped plate, an L-shaped rod is fixedly connected to the inner side of the L-shaped plate, a slide plate is movably sleeved on the outer side of the L-shaped rod, a return spring is fixedly connected between the side of the slide plate away from the drive shaft and the L-shaped plate, the return spring is sleeved on the outer side of the L-shaped rod, a connecting frame is fixedly connected to the bottom of the slide plate, a locking gear is fixedly connected to the connecting frame, an external gear is fixedly installed on the outer side of the drive shaft, and the external gear meshes with the locking gear.

[0009] Preferably, the top of the L-shaped plate is provided with a guide groove, a guide block is slidably connected in the guide groove, the top of the guide block is provided with an auxiliary groove, and the guide block is fixed to the top of the slide plate.

[0010] Preferably, the top of the cryogenic cylinder is fixedly connected to an exhaust pipe, which communicates with the interior of the cryogenic cylinder, and an exhaust valve is installed on the exhaust pipe.

[0011] Preferably, a pre-vaporization box is fixedly installed on the top of the cryogenic cylinder, and a delivery pipe and an air inlet pipe are fixedly connected to both sides of the pre-vaporization box, respectively. The end of the air inlet pipe away from the pre-vaporization box is fixed to the bottom of the cryogenic cylinder, and the air inlet pipe is connected to the interior of the cryogenic cylinder. An air inlet valve is installed on the air inlet pipe.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. This utility model, through the cooperation between the turntable and the drive shaft, as well as the screw and the lifting plate, facilitates the sliding of the two limiting plates along the two limiting rods, thereby enabling the adjusting ring to move longitudinally. When the adjusting ring descends and fits with each sealing ring, it can block each air outlet. When the adjusting ring rises and disengages from each sealing ring, it can open each air outlet, thus facilitating the control of the opening and closing of the air outlet.

[0014] 2. This new type of mechanism facilitates the engagement of the locking gear and the external gear to limit the drive shaft through the cooperation between the L-shaped rod, the sliding plate, the return spring, and the connecting frame, thereby preventing the turntable from rotating arbitrarily due to external forces. Attached Figure Description

[0015] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0016] In the attached diagram:

[0017] Figure 1This is a schematic diagram of the temperature control circulation system for the liquid nitrogen cryogenic treatment of the cutting tool according to this utility model;

[0018] Figure 2 This is a cross-sectional view of the cryogenic cylinder of this utility model;

[0019] Figure 3 This is a schematic diagram of the adjustment mechanism of this utility model;

[0020] Figure 4 This is a schematic diagram of the negative pressure cylinder structure of this utility model;

[0021] Figure 5 This is a schematic diagram of the L-shaped plate structure of this utility model.

[0022] In the diagram: 1. Cryogenic cylinder; 2. Adjustment mechanism; 201. Negative pressure cylinder; 202. Lifting plate; 203. Exhaust pipe; 204. Screw; 205. Adjusting ring; 206. Limiting plate; 207. Limiting rod; 208. L-shaped plate; 209. Turntable; 2010. Drive shaft; 2011. Sealed bearing; 2012. Sealing ring; 2013. Exhaust hole; 2014. External gear; 2015. Locking gear; 2016. Connecting frame; 2017. L-shaped round rod; 2018. Slide plate; 2019. Return spring; 2020. Guide groove; 2021. Auxiliary groove; 2022. Guide block; 3. Inlet valve; 4. Pre-vaporization box; 5. Conveying pipe; 6. Extraction valve; 7. Extraction pipe; 8. Inlet pipe; 9. Door body; 10. Temperature sensor. Detailed Implementation

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0024] Example 1, by Figure 1-2 The present invention relates to a temperature control circulation system for deep cryogenic treatment of cutting tools using liquid nitrogen, comprising a cryogenic cylinder 1, a door 9 hinged to the outside of the cryogenic cylinder 1, multiple temperature sensors 10 installed at equal angles inside the cryogenic cylinder 1, and an adjustment mechanism 2 provided on the cryogenic cylinder 1. By setting multiple temperature sensors 10 inside the cryogenic cylinder 1, the temperature at various points inside the cryogenic cylinder 1 can be measured, thereby facilitating the operator to control the temperature of the cryogenic cylinder 1.

[0025] Specifically, by Figure 3-5The regulating mechanism 2 includes a negative pressure cylinder 201 fixed inside the cryogenic cylinder 1. Multiple vent pipes 203 are fixedly connected at equal angles to the bottom of the negative pressure cylinder 201. Multiple vent holes 2013 are provided at equal angles on the bottom of the negative pressure cylinder 201. Multiple sealing rings 2012 are fixedly connected at equal angles to the inner bottom wall of the negative pressure cylinder 201. The inner diameter of the sealing rings 2012 and the vent pipes 203 is equal to the inner diameter of the vent holes 2013, and each sealing ring 2012 and vent pipe 203 corresponds one-to-one with a vent hole 2013. Two... Two limiting rods 207 are movably fitted with limiting plates 206 on their outer sides. An adjusting ring 205 is fixedly connected between the bottoms of the two limiting plates 206. The adjusting ring 205 is located at the top of each sealing ring 2012. A screw 204 is rotatably connected to the inner bottom wall of the negative pressure cylinder 201. A lifting plate 202 is threaded onto the outer side of the screw 204 and fixed between the two limiting plates 206. A drive shaft 2010 is fixedly connected to the top of the screw 204. The top of the drive shaft 2010 extends to the outer side of the cryogenic cylinder 1 and is fixedly connected to a turntable 209. The drive shaft 2010 is rotatably connected to the cryogenic cylinder 1. A sealed bearing 2011 is provided at the top of the cryogenic cylinder 1, and the sealed bearing 2011 is sleeved on the outside of the drive shaft 2010. An L-shaped plate 208 is fixedly connected to the top of the cryogenic cylinder 1. The drive shaft 2010 passes through the L-shaped plate 208 and is rotatably connected to it. An L-shaped rod 2017 is fixedly connected to the inner side of the L-shaped plate 208. A sliding plate 2018 is movably sleeved on the outer side of the L-shaped rod 2017. A return spring 2019 is fixedly connected between the side of the sliding plate 2018 away from the drive shaft 2010 and the L-shaped plate 208. A return spring 2019 is sleeved on the outside of the L-shaped round rod 2017. A connecting frame 2016 is fixedly connected to the bottom of the slide plate 2018. A locking gear 2015 is fixedly connected to the connecting frame 2016. An external gear 2014 is fixedly installed on the outside of the drive shaft 2010. The external gear 2014 meshes with the locking gear 2015. A guide groove 2020 is provided on the top of the L-shaped plate 208. A guide block 2022 is slidably connected in the guide groove 2020. An auxiliary groove 2021 is provided on the top of the guide block 2022. The guide block 2022 is fixed to the top of the slide plate 2018.

[0026] In operation, the guide block 2022 first slides along the guide groove 2020 via the auxiliary groove 2021, causing the slide plate 2018 to slide along the L-shaped rod 2017. At this time, the return spring 2019 is compressed, and the locking gear 2015 moves and separates from the external gear 2014 via the connecting bracket 2016, releasing the restriction effect on the drive shaft 2010. Then, the turntable 209 is rotated, causing the drive shaft 2010 to rotate and the screw 204 to rotate. Then, the lifting plate 202 causes the two limit plates 206 to slide along the two limit rods 207 respectively, while the adjusting ring 205 moves longitudinally. When the adjusting ring 205 descends and... When each sealing ring 2012 is in place, it blocks each vent 2013. When the adjusting ring 205 rises and separates from each sealing ring 2012, it opens each vent 2013. Then, the guide block 2022 is released, allowing the slide plate 2018 to slide along the L-shaped rod 2017 under the action of the return spring 2019. The connecting bracket 2016 drives the locking gear 2015 to move until it meshes with the external gear 2014, thereby limiting the drive shaft 2010 and preventing the turntable 209 from rotating arbitrarily due to external forces. This fixes the position of the adjusting ring 205 and finally controls the opening and closing of the vent 2013.

[0027] Specifically, by Figure 1-2 As shown, a vacuum pipe 7 is fixedly connected to the top of the cryogenic cylinder 1, and the vacuum pipe 7 communicates with the interior of the cryogenic cylinder 1. A vacuum valve 6 is installed on the vacuum pipe 7. A pre-vaporization box 4 is fixedly installed on the top of the cryogenic cylinder 1. A delivery pipe 5 and an air inlet pipe 8 are fixedly connected to both sides of the pre-vaporization box 4, respectively. The end of the air inlet pipe 8 away from the pre-vaporization box 4 is fixed to the bottom of the cryogenic cylinder 1, and the air inlet pipe 8 communicates with the interior of the cryogenic cylinder 1. An air inlet valve 3 is installed on the air inlet pipe 8.

[0028] In operation, the tool is first placed inside the cryogenic cylinder 1. Then, the end of the evacuation pipe 7 away from the cryogenic cylinder 1 is connected to the vacuum pump. The evacuation valve 6 is then opened to create a negative pressure in the negative pressure cylinder 201 through the vacuum pump. The evacuation valve 6 is then closed, and liquid nitrogen is injected into the pre-vaporization box 4 through the delivery pipe 5. The liquid nitrogen vaporizes in the pre-vaporization box 4. Then, the inlet valve 3 is opened, and the negative pressure in the negative pressure cylinder 201 causes low-temperature nitrogen to enter the negative pressure cylinder 201 through the inlet pipe 8. When the negative pressure cylinder 201 is full of nitrogen, the adjusting ring 205 moves upward to open each vent 2013. Finally, the nitrogen enters the cryogenic cylinder 1 through the vent 2013 and the vent pipe 203 to perform cryogenic treatment on the tool.

Claims

1. A temperature control circulation system for deep nitrogen cryogenic treatment of cutting tools, comprising a cryogenic cylinder (1), characterized in that: The cryogenic cylinder (1) is hinged to a door (9) on the outside, and multiple temperature sensors (10) are installed at equal angles inside the cryogenic cylinder (1). An adjustment mechanism (2) is provided on the cryogenic cylinder (1). The regulating mechanism (2) includes a negative pressure cylinder (201) fixed inside the cryogenic cylinder (1). Multiple air outlet pipes (203) are fixedly connected at equal angles to the bottom of the negative pressure cylinder (201). Multiple air outlet holes (2013) are provided at equal angles to the bottom of the negative pressure cylinder (201). Multiple sealing rings (2012) are fixedly connected at equal angles to the inner bottom wall of the negative pressure cylinder (201). The inner diameter of the sealing rings (2012) and the air outlet pipes (203) is equal to the inner diameter of the air outlet holes (2013), and the sealing rings (2012) and the air outlet pipes (203) correspond one-to-one with the air outlet holes (2013). Two limiting rods (207) are symmetrically fixedly connected between the top of the negative pressure cylinder (201) and the cryogenic cylinder (1). Limiting plates (206) are movably sleeved on the outer side of the rod (207). An adjusting ring (205) is fixedly connected between the bottom of the two limiting plates (206). The adjusting ring (205) is located on the top of each sealing ring (2012). A screw (204) is rotatably connected to the inner bottom wall of the negative pressure cylinder (201). A lifting plate (202) is threadedly sleeved on the outer side of the screw (204). The lifting plate (202) is fixed between the two limiting plates (206). A drive shaft (2010) is fixedly connected to the top of the screw (204). The top of the drive shaft (2010) extends to the outer side of the cryogenic cylinder (1) and is fixedly connected to a turntable (209). The drive shaft (2010) is rotatably connected to the cryogenic cylinder (1).

2. The temperature control circulation system for deep cryogenic treatment of cutting tools using liquid nitrogen according to claim 1, characterized in that: The top of the cryogenic cylinder (1) is provided with a sealed bearing (2011), which is sleeved on the outside of the drive shaft (2010).

3. The temperature control circulation system for deep cryogenic treatment of cutting tools using liquid nitrogen according to claim 1, characterized in that: An L-shaped plate (208) is fixedly connected to the top of the cryogenic cylinder (1). A drive shaft (2010) passes through the L-shaped plate (208) and is rotatably connected to it. An L-shaped rod (2017) is fixedly connected to the inner side of the L-shaped plate (208). A sliding plate (2018) is movably sleeved on the outer side of the L-shaped rod (2017). The side of the sliding plate (2018) away from the drive shaft (2010) is between the sliding plate (2018) and the L-shaped plate (208). A return spring (2019) is fixedly connected and sleeved on the outside of the L-shaped round rod (2017). A connecting frame (2016) is fixedly connected to the bottom of the slide plate (2018). A locking gear (2015) is fixedly connected to the connecting frame (2016). An external gear (2014) is fixedly installed on the outside of the drive shaft (2010). The external gear (2014) meshes with the locking gear (2015).

4. The temperature control circulation system for deep cryogenic treatment of cutting tools with liquid nitrogen according to claim 3, characterized in that: The top of the L-shaped plate (208) is provided with a guide groove (2020), and a guide block (2022) is slidably connected in the guide groove (2020). The top of the guide block (2022) is provided with an auxiliary groove (2021), and the guide block (2022) is fixed to the top of the slide plate (2018).

5. The temperature control circulation system for deep cryogenic treatment of cutting tools using liquid nitrogen according to claim 1, characterized in that: The top of the cryogenic cylinder (1) is fixedly connected to an exhaust pipe (7), which is connected to the interior of the cryogenic cylinder (1). An exhaust valve (6) is installed on the exhaust pipe (7).

6. The temperature control circulation system for deep cryogenic treatment of cutting tools with liquid nitrogen according to claim 1, characterized in that: A pre-vaporization box (4) is fixedly installed on the top of the cryogenic cylinder (1). A conveying pipe (5) and an air inlet pipe (8) are fixedly connected to both sides of the pre-vaporization box (4). The end of the air inlet pipe (8) away from the pre-vaporization box (4) is fixed to the bottom of the cryogenic cylinder (1), and the air inlet pipe (8) is connected to the interior of the cryogenic cylinder (1). An air inlet valve (3) is installed on the air inlet pipe (8).

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