Medium-frequency valve heating furnace

Abstract

The utility model discloses a medium-frequency valve heating furnace, which relates to the technical field of heating furnaces and particularly comprises a furnace body, an induction coil is fixedly mounted in the furnace body, a crucible is placed in the furnace body, a plurality of water return pipes are fixedly mounted on the inner wall of the furnace body, valves are fixedly mounted at one ends of the plurality of water return pipes, and the other ends of the plurality of water return pipes are communicated with the induction coil. And pressure gauges are fixedly installed at one ends of the multiple water return pipes, branch pipes are fixedly installed at one ends of the multiple water return pipes, baffles are rotatably installed in the branch pipes, and the outer sides of the branch pipes are sleeved with inflation balls. The sleeve is arranged at the bottom of the inflatable ball and connected with the branch pipe on the outer side of the water return pipe, then the detected water return pipe is marked through the marking assembly on the side wall of the sleeve, the marking device and the detection device are combined, and after detection is completed, a rubber head on the marking assembly can be pressed to push a pen point to make contact with the branch pipe. Therefore, the detected water return pipe is marked, and the condition that the maintenance speed is affected by frequent tool replacement is avoided.

Description

Technical Field

[0001] This utility model relates to the field of heating furnace technology, specifically to a medium-frequency valve heating furnace. Background Technology

[0002] When valve parts, especially valve stems, valve discs, and valve seats, require surfaces with high hardness and high wear resistance, surface hardening is one of the preferred processes, and medium-frequency induction heating is one of the most commonly used and efficient methods to achieve this process.

[0003] An intermediate frequency furnace is an induction heating device that converts 50Hz AC power into intermediate frequency (100Hz to 8000Hz) AC power. It uses the principle of intermediate frequency electromagnetic induction heating to heat metal workpieces. During heating, the furnace heats the workpiece itself through electromagnetic induction, without contacting the workpiece.

[0004] Medium-frequency furnaces require water cooling to maintain a stable temperature and prevent overheating. A dedicated closed-loop cooling tower for medium-frequency furnaces uses coiled radiators, spray systems, and an air cooling circulation system for cooling. However, the return water inlets of the coiled radiators are connected to both the furnace's return water pipe and the medium-frequency power supply. When the return water pipe becomes blocked, the water that has undergone heat exchange cannot flow out of the medium-frequency furnace, reducing the cooling efficiency of the closed-loop cooling tower. Workers need to shut down the furnace for maintenance. Since there are many return water pipes, workers must check each one individually to identify the blockage. During inspection, testing devices are used, and tools are changed to mark the inspected pipes. This process involves constantly changing tools, slowing down the maintenance process. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides a medium-frequency valve heating furnace, which solves the problems mentioned in the background section.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model is implemented through the following technical solution: It includes a furnace body, an induction coil fixedly installed inside the furnace body, a crucible placed inside the furnace body, several return water pipes fixedly installed on the inner wall of the furnace body, a valve fixedly installed at one end of each of the return water pipes, a pressure gauge fixedly installed at one end of each of the return water pipes, a branch pipe fixedly installed at one end of each of the return water pipes, a baffle rotatably installed inside the branch pipe, an inflatable ball sleeved on the outer side of the branch pipe, an exhaust pipe fixedly installed at the bottom of the inflatable ball, a sleeve fixedly installed at the bottom of the inflatable ball, a marking component provided on the side wall of the sleeve, the marking component including an installation sleeve, a push rod slidably installed inside the installation sleeve, a pen tip fixedly installed at the tail end of the push rod, a spring sleeved on the outer side of the push rod, and a rubber head fixedly installed at the top end of the installation sleeve.

[0009] Optionally, the return water pipe is in a spiral upward shape, the inner diameter of the spiral of the return water pipe is larger than the outer diameter of the induction coil, and the number of spiral turns of the return water pipe is smaller than the number of bolt turns of the induction coil.

[0010] Optionally, an installation groove is provided on the inner side wall of the furnace body, the inner diameter of the installation groove is equal to the diameter of the return water pipe, and the return water pipe is fixedly installed in the installation groove on the side wall of the furnace body.

[0011] Optionally, a connecting block is provided inside the branch pipe, the connecting block has a through groove, a connecting post is provided at one end of the baffle, a torsion spring is fixedly installed on the outside of the connecting post, and the connecting post and the torsion spring are rotatably installed in the through groove of the connecting block.

[0012] Optionally, the outer diameter of the exhaust pipe is equal to the inner diameter of the branch pipe, and the exhaust pipe is inserted into the branch pipe.

[0013] Optionally, the outer diameter of one end of the sleeve is smaller than the outer diameter of the branch pipe, and the sleeve is fitted onto the outside of the branch pipe.

[0014] Optionally, the sleeve has a through hole on its side wall, the inner diameter of which is equal to the outer diameter of the mounting sleeve, and the mounting sleeve is fixedly installed in the through hole on the side wall of the sleeve.

[0015] Optionally, a cylindrical groove is provided on the inner side of the mounting sleeve, and a limit ring is provided on the outer side of the push rod. The inner diameter of the cylindrical groove is equal to the outer diameter of the limit ring and the spring, and the push rod is slidably installed inside the mounting sleeve.

[0016] This utility model provides a medium-frequency valve heating furnace, which has the following beneficial effects:

[0017] 1. This medium-frequency valve heating furnace seals the return water pipe with a valve, then uses an inflation ball and an exhaust pipe to inflate the return water pipe, and uses a pressure gauge at the other end to detect the pressure change in the return water pipe, thereby determining whether the return water pipe is blocked.

[0018] 2. This medium-frequency valve heating furnace connects a sleeve at the bottom of the inflatable ball to a branch pipe outside the return water pipe. Then, a marking component on the side wall of the sleeve is used to mark the returned water pipe after testing. By combining the marking device with the testing device, after testing, the rubber head on the marking component can be pressed to push the pen tip to contact the branch pipe, thereby marking the returned water pipe after testing. This avoids the frequent replacement of tools, which affects the maintenance speed. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the internal structure of the furnace body of this utility model;

[0021] Figure 3 This is a schematic diagram of the internal structure of the branch pipe of this utility model;

[0022] Figure 4 This is an enlarged schematic diagram of part A of the present invention;

[0023] Figure 5 This is a schematic diagram of the exhaust pipe insertion structure of this utility model;

[0024] Figure 6 This is a schematic diagram of the marking component structure of this utility model;

[0025] Figure 7 This is an enlarged schematic diagram of part B of the present invention.

[0026] In the diagram: 1. Furnace body; 2. Induction coil; 3. Crucible; 4. Return water pipe; 5. Valve; 6. Pressure gauge; 7. Branch pipe; 8. Baffle; 81. Torsion spring; 9. Inflatable ball; 10. Exhaust pipe; 11. Sleeve; 12. Marking assembly; 121. Mounting sleeve; 122. Push rod; 123. Pen tip; 124. Spring; 125. Rubber head. Detailed Implementation

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

[0028] Example

[0029] Please see Figures 1 to 7The present invention provides a technical solution including a furnace body 1, an induction coil 2 fixedly installed inside the furnace body 1, a crucible 3 placed inside the furnace body 1, a plurality of return water pipes 4 fixedly installed on the inner wall of the furnace body 1, a valve 5 fixedly installed at one end of each of the plurality of return water pipes 4, a pressure gauge 6 fixedly installed at one end of each of the plurality of return water pipes 4, a branch pipe 7 fixedly installed at one end of each of the plurality of return water pipes 4, a baffle 8 rotatably installed inside the branch pipe 7, an inflatable ball 9 sleeved on the outside of the branch pipe 7, an exhaust pipe 10 fixedly installed at the bottom of the inflatable ball 9, a sleeve 11 fixedly installed at the bottom of the inflatable ball 9, a marking component 12 provided on the side wall of the sleeve 11, the marking component 12 including a mounting sleeve 121, a push rod 122 slidably installed inside the mounting sleeve 121, a pen tip 123 fixedly installed at the tail end of the push rod 122, a spring 124 sleeved on the outside of the push rod 122, and a rubber head 125 fixedly installed at the top end of the mounting sleeve 121.

[0030] Specifically, the return water pipe 4 is sealed by valve 5, and then air is injected into the return water pipe 4 using the inflation ball 9 and the vent pipe 10. The pressure change in the return water pipe 4 is then detected by the pressure gauge at the other end to determine whether the return water pipe 4 is blocked. By combining the marking device with the detection device, after the detection is completed, the marking component 12 can be pressed to make it contact the branch pipe 7, thereby marking the detected return water pipe 4, avoiding frequent tool changes that affect the maintenance speed.

[0031] Please see Figure 2 The return water pipe 4 is in a spiral upward shape. The inner diameter of the spiral of the return water pipe 4 is larger than the outer diameter of the induction coil 2. The number of spiral turns of the return water pipe 4 is less than the number of bolt turns of the induction coil 2. The number of spiral turns of the return water pipe 4 can be selected to be two to four turns, which can ensure that the cooling water has enough time to perform heat exchange in the furnace body 1, and also avoid the cooling water that has completed heat exchange remaining in the furnace body 1, causing the cooling rate to decrease.

[0032] An installation groove is provided on the inner side wall of the furnace body 1. The inner diameter of the installation groove is equal to the diameter of the return water pipe 4. The return water pipe 4 is fixedly installed in the installation groove on the side wall of the furnace body 1.

[0033] Specifically, by setting the return water pipe 4 to a multi-segment design, the cooling water is prevented from staying in the furnace body 1 for too long, thus reducing the cooling rate.

[0034] Please see Figures 3 to 5 The branch pipe 7 has a connecting block inside, and the connecting block has a through groove. One end of the baffle 8 has a connecting post, and a torsion spring 81 is fixedly installed on the outside of the connecting post. The connecting post and the torsion spring 81 are rotatably installed in the through groove of the connecting block.

[0035] The outer diameter of one end of the exhaust pipe 10 is smaller than the inner diameter of the branch pipe 7, and the exhaust pipe 10 is inserted into the branch pipe 7.

[0036] Specifically, when not under test, the baffle 8 can prevent the cooling water in the return water pipe 4 from flowing out through the branch pipe 7. When under test, the baffle 8 is opened by inserting the exhaust pipe 10, thereby enabling air to be injected into the return water pipe 4.

[0037] Please see Figures 6 to 7 The inner diameter of the sleeve 11 is equal to the outer diameter of the branch pipe 7, and the sleeve 11 is fitted onto the outside of the branch pipe 7.

[0038] The side wall of the sleeve 11 has a through hole, the inner diameter of which is equal to the outer diameter of the mounting sleeve 121. The mounting sleeve 121 is fixedly installed in the through hole of the side wall of the sleeve 11.

[0039] The inner side of the mounting sleeve 121 is provided with a cylindrical groove, and the outer side of the push rod 122 is provided with a limit ring. The inner diameter of the cylindrical groove is equal to the outer diameter of the limit ring and the spring 124. The push rod 122 is slidably installed inside the mounting sleeve 121. When the push rod 122 is not pressed or pushed, the pen tip 123 stays inside the mounting sleeve 121 and does not contact the outer wall of the branch pipe 7.

[0040] Specifically, the sleeve 11 combines the inflatable ball 9 with the marking component, thus integrating the inflation device and the marking device into one unit, avoiding frequent tool replacements during use.

[0041] Before use, test the return water pipe 4. First, close the valve 5 on the return water pipe 4. Then, insert the vent pipe 10 at the bottom of the inflator 9 into the branch pipe 7 on the side of the return water pipe 4, ensuring that the sleeve 11 is fitted onto the outside of the branch pipe 7. Press the inflator 9 to inflate the return water pipe 4. Then, observe the pressure change through the pressure gauge 6 at the other end of the return water pipe 4 to determine if the return water pipe 4 is blocked. After the test, if the return water pipe 4 is not blocked, simply press the marked group on the outside of the sleeve 11 once. The rubber head 125 of component 12 causes the push rod 122 to push the pen tip 123 to mark a point on the outside of the branch pipe 7 of the return water pipe 4, indicating that the return water pipe 4 has been tested. If the return water pipe 4 is blocked, the rubber head 125 of the marking component 12 can be pressed and rotated one turn, so that the pen tip 123 marks a full circle on the outside of the branch pipe 7, indicating that the return water pipe 4 has been tested and is blocked inside. This can avoid multiple tests and missed tests when there are many return water pipes in the heating furnace, and the test results are easy to distinguish.

[0042] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A medium-frequency valve heating furnace, comprising a furnace body (1), wherein an induction coil (2) is fixedly installed inside the furnace body (1), a crucible (3) is placed inside the furnace body (1), and a plurality of return water pipes (4) are fixedly installed on the inner wall of the furnace body (1), characterized in that: A valve (5) is fixedly installed at one end of each of the several return water pipes (4), a pressure gauge (6) is fixedly installed at one end of each of the several return water pipes (4), a branch pipe (7) is fixedly installed at one end of each of the several return water pipes (4), a baffle (8) is rotatably installed inside the branch pipe (7), an inflatable ball (9) is sleeved on the outside of the branch pipe (7), an exhaust pipe (10) is fixedly installed at the bottom of the inflatable ball (9), a sleeve (11) is fixedly installed at the bottom of the inflatable ball (9), a marking component (12) is provided on the side wall of the sleeve (11), the marking component (12) includes an installation sleeve (121), a push rod (122) is slidably installed inside the installation sleeve (121), a pen tip (123) is fixedly installed at the tail end of the push rod (122), a spring (124) is sleeved on the outside of the push rod (122), and a rubber head (125) is fixedly installed at the top end of the installation sleeve (121).

2. The medium-frequency valve heating furnace according to claim 1, characterized in that: The return water pipe (4) is in a spiral upward shape. The inner diameter of the spiral of the return water pipe (4) is greater than the outer diameter of the induction coil (2). The number of spiral turns of the return water pipe (4) is less than the number of bolt turns of the induction coil (2).

3. The medium-frequency valve heating furnace according to claim 1, characterized in that: An installation groove is provided on the inner side wall of the furnace body (1). The inner diameter of the installation groove is equal to the diameter of the return water pipe (4). The return water pipe (4) is fixedly installed in the installation groove on the side wall of the furnace body (1).

4. The medium-frequency valve heating furnace according to claim 1, characterized in that: The branch pipe (7) is provided with a connecting block inside. The connecting block has a through groove. One end of the baffle (8) is provided with a connecting post. A torsion spring (81) is fixedly installed on the outside of the connecting post. The connecting post and the torsion spring (81) are rotatably installed in the through groove of the connecting block.

5. A medium-frequency valve heating furnace according to claim 1, characterized in that: The outer diameter of one end of the exhaust pipe (10) is smaller than the inner diameter of the branch pipe (7), and the exhaust pipe (10) is inserted into the branch pipe (7).

6. A medium-frequency valve heating furnace according to claim 1, characterized in that: The inner diameter of the sleeve (11) is equal to the outer diameter of the branch pipe (7), and the sleeve (11) is fitted onto the outside of the branch pipe (7).

7. A medium-frequency valve heating furnace according to claim 1, characterized in that: The sleeve (11) has a through hole on its side wall. The inner diameter of the through hole is equal to the outer diameter of the mounting sleeve (121). The mounting sleeve (121) is fixedly installed in the through hole on the side wall of the sleeve (11).

8. A medium-frequency valve heating furnace according to claim 1, characterized in that: The inner side of the mounting sleeve (121) is provided with a cylindrical groove, and the outer side of the push rod (122) is provided with a limiting ring. The inner diameter of the cylindrical groove is equal to the outer diameter of the limiting ring and the spring (124). The push rod (122) is slidably installed inside the mounting sleeve (121).

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