Temperature measuring device convenient to replace quickly

Abstract

The utility model discloses a temperature measuring device convenient to replace quickly, relates to the technical field of nodular cast iron pipe casting processes, and aims to solve the problem that the whole temperature measuring gun needs to be replaced after the front end of the temperature measuring gun is burnt out. The temperature measuring gun comprises a temperature measuring gun body, the end portion of the temperature measuring gun body is detachably connected with a gun barrel through a body barrel connecting piece, the other end of the gun barrel is detachably connected with a gun head through a pipe head connecting piece, and a signal transmission line is arranged in the gun barrel and used for connecting the gun head with a signal processing device located at the temperature measuring gun body. The gun barrel is composed of a gun barrel near body section and a gun barrel far body section which are detachably connected through a heat insulation connecting piece, through holes are formed in the middle of the barrel connecting piece, the middle of the heat insulation connecting piece and the middle of the barrel head connecting piece and used for allowing a signal transmission line to penetrate through, and the three connecting pieces are connected through threads or fast-assembly plugs. The front end of the temperature measuring gun provided by the utility model has fewer replaced parts after being burnt out, so that the cost of consumables is reduced, and an internal signal transmission line is more convenient to penetrate again.

Description

Technical Field

[0001] This utility model relates to the field of ductile iron pipe casting technology, specifically a temperature measuring device that is easy to replace quickly. Background Technology

[0002] In the casting production process of ductile iron pipes, molten iron is required for pouring. The temperature of the molten iron is one of the important indicators affecting the quality of the casting. Excessively high molten iron temperature can easily lead to defects such as shrinkage porosity and cementite; excessively low molten iron temperature can easily lead to problems such as cold shuts. Therefore, molten iron temperature control is extremely important for casting production. To ensure that the molten iron temperature meets the process requirements, it is necessary to frequently measure the molten iron temperature to control the tapping temperature. However, frequent measurements can easily cause the tip of the temperature measuring gun to burn out, rendering it unable to measure, so it needs to be replaced frequently to ensure product quality.

[0003] Traditional temperature guns are one-piece structures; if the front end is damaged, the entire gun becomes unusable and must be replaced, resulting in significant waste. Furthermore, the overall length of the temperature gun makes threading the signal transmission line (temperature sensing wire) through the internal cavity very cumbersome, affecting replacement efficiency. Therefore, there is an urgent need for a temperature measuring device that allows for quick and easy replacement to solve this problem. Utility Model Content

[0004] The purpose of this invention is to provide a temperature measuring device that is easy to replace quickly, so as to solve the problem of having to replace the entire temperature measuring gun after the front end is burned out.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a temperature measuring device that is easy to replace quickly, comprising a temperature measuring gun body, the end of which is detachably connected to a gun barrel via a body tube connector, the other end of which is detachably connected to a gun head via a tube head connector, and a signal transmission line provided inside the gun barrel for connecting the gun head to a signal processing device located at the temperature measuring gun body; the gun barrel consists of a near-body section and a far-body section, which are detachably connected via a heat insulation connector, and through holes are provided in the middle of the body tube connector, the heat insulation connector, and the tube head connector for the signal transmission line to pass through, and the connection method of the three connectors is respectively threaded or quick-connect plug.

[0006] Preferably, the heat insulation connector is made of refractory material, and a ring-shaped heat insulation block is fixed in the middle of its through hole. The heat insulation block is located between the near section and the far section of the barrel, and the inner diameter of the heat insulation block is smaller than the outer diameter of the barrel.

[0007] Preferably, the barrel distal section is provided with multiple sections, and adjacent barrel distal sections are connected by quick-connect plugs.

[0008] Preferably, the signal transmission line is divided into two sections, and the two sections are connected by a pair of male and female plugs. The male and female plugs are located at the through holes opened in the middle of the tube connector or the heat insulation connector.

[0009] Compared with the prior art, the beneficial effects of this utility model are:

[0010] This temperature measuring device, which is easy to replace quickly, has a simple structure and reasonable design. If the front end of the temperature measuring gun is burned during use, only the gun head needs to be replaced or the far section of the barrel needs to be replaced. There is basically no need to replace the near section of the barrel. Not only are fewer parts replaced, but the cost of consumables is also reduced. Moreover, since the barrel section that needs to be replaced is shorter than the whole barrel, it is also more convenient to re-run the internal signal transmission line. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0012] Figure 2 This is a cross-sectional structural diagram of one embodiment of a thermal insulation connector.

[0013] In the diagram: 1. Temperature measuring gun body; 11. Barrel connector; 21. Near section of the barrel; 22. Far section of the barrel; 23. Heat insulation connector; 231. Heat insulation block; 3. Gun head; 4. Tube head connector. Detailed Implementation

[0014] A temperature measuring device that is easy to replace quickly includes a temperature measuring gun body 1, with a gun barrel detachably connected to one end via a body tube connector 11. The other end of the gun barrel is detachably connected to a gun head 3 via a tube head connector 4. A signal transmission line is provided inside the gun barrel to connect the gun head 3 to a signal processing device located at the temperature measuring gun body 1. The gun barrel consists of a near-body section 21 and a far-body section 22, which are detachably connected via a heat-insulating connector 23. Through holes are provided in the middle of the body tube connector 11, the heat-insulating connector 23, and the tube head connector 4 for the signal transmission line to pass through. The connection method of the three connectors is either threaded or quick-connect plug. If the front end of this structure is burned during use, only the gun head 3 can be replaced or the far-body section 22 can be added. It is basically unnecessary to replace the near-body section 21. The location of the heat-insulating connector 23 on the gun body can be determined according to the actual use in daily production. Specifically, it is advisable to use the part where burning is rarely caused as the dividing line.

[0015] In a preferred embodiment, the heat-insulating connector 23 is made of refractory material, and a ring-shaped heat-insulating block 231 is fixed in the center of its through hole, as detailed in the reference. Figure 2The heat insulation block 231 is located between the near section 21 and the far section 22 of the barrel, and the inner diameter of the heat insulation block 231 is smaller than the outer diameter of the barrel. When the near section 21 and the far section 22 of the barrel are connected at both ends, they are separated by the heat insulation block 231 and will not directly transfer heat. Even if the front end of the temperature measuring gun is burned, the temperature of the near section 21 of the barrel will not be too high due to the heat insulation effect of the refractory material. Usually, only the gun head 3 needs to be replaced. If the damage is more serious, the far section 22 of the barrel will be replaced at the same time, which can save consumables. For reference, the outer diameter of the heat insulation connector 23 can be larger than that of the barrel.

[0016] Since the front-end burn usually occurs in a part that is not the whole, in order to reduce the number of replacements, it is further optimized that there are multiple barrel distal sections 22, and adjacent barrel distal sections 22 are connected by quick-connect plugs.

[0017] Furthermore, since the signal transmission line is located inside the barrel, if the burn is severe enough to affect the signal transmission line, the entire cable needs to be replaced. This requires disassembling the temperature measuring gun body 1 and is extremely troublesome. Therefore, to avoid these cumbersome operations, the following solution can be chosen: the signal transmission line is divided into two sections, connected by a pair of male and female plugs. The male and female plugs are located at the through-holes in the barrel connector 11 or the heat insulation connector 23. The fixing method can be threaded connection, slot, or integral molding, etc. The male and female plugs are fixed to the heat insulation connector 23. In this implementation with the through hole in the middle, the distal section 22 of the barrel and its internal signal transmission line can actually be replaced as a whole, because the male and female plugs can be connected at the same time as the distal section 22 of the barrel is connected to the heat insulation connector 23. When the signal transmission line is damaged and needs to be replaced, the male and female plugs can be disconnected and only the damaged part of the wire at the front can be replaced without disassembling the temperature measuring gun body 1. However, this solution also has disadvantages, namely, the signal is more accurate when the signal transmission line itself is a whole, and noise will be generated when there is a plug. It is best to use it after adjustment and calibration.

[0018] The connection structures of the aforementioned threads and quick-connect plugs are all existing technologies, and any commercially available method is acceptable. For example, the two ends of the plug can have a groove on one end and a matching limiting block on the other end. After insertion, the angle can be rotated to achieve locking, etc., which will not be elaborated here.

[0019] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope defined in the claims.

[0020] Any aspects of this utility model not described in detail are known to those skilled in the art.

Claims

1. A temperature measuring device for facilitating quick replacement, characterized in that: The temperature measuring gun body (1) is detachably connected with a barrel at its end through a barrel connecting piece (11), and the other end of the barrel is detachably connected with a gun head (3) through a tube head connecting piece (4), and a signal transmission line is arranged in the barrel for connecting the gun head (3) with a signal processing device arranged at the temperature measuring gun body (1); the barrel is composed of a barrel near body section (21) and a barrel far body section (22), and the two are detachably connected through a heat insulation connecting piece (23), and a through hole is arranged in the middle of the barrel connecting piece (11), the heat insulation connecting piece (23) and the tube head connecting piece (4) for passing through the signal transmission line, and the connecting modes of the three connecting pieces are respectively a thread or a quick-mount plug.

2. The temperature measuring device according to claim 1, wherein: The heat insulation connecting piece (23) is made of a fireproof material, and a ring-shaped heat insulation block (231) is fixedly arranged in the middle of the through hole of the heat insulation connecting piece (23), the heat insulation block (231) is located between the barrel near body section (21) and the barrel far body section (22), and the inner diameter of the heat insulation block (231) is smaller than the outer diameter of the barrel.

3. The temperature measuring device according to claim 1, wherein: The barrel far body section (22) is provided in plurality, and adjacent barrel far body sections (22) are connected through quick-mount plugs.

4. The temperature measuring device according to claim 1, wherein: The signal transmission line is arranged in two sections, and the two sections are connected in communication through a pair of male and female plugs, and the male and female plugs are arranged in the through hole arranged in the middle of the barrel connecting piece (11) or the heat insulation connecting piece (23).

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