A hot riveting head for a distribution valve

Abstract

This application belongs to the field of distribution valve manufacturing technology, and particularly relates to a hot riveting head for a distribution valve, including a mounting rod and a hot riveting head installed at one end of the mounting rod; at least one heating rod and at least one temperature-sensing thermocouple are provided inside the mounting rod; the mounting rod is also provided with a reserved calibration hole, which is configured to install a calibration thermocouple when temperature calibration is required. Beneficial effects: In this application, the heating rod and temperature-sensing thermocouple are installed inside the mounting rod, which can heat and control the temperature of the hot riveting head. After the hot riveting head has been running for a period of time, the calibration thermocouple is installed in the reserved calibration hole, which can verify the working temperature of the hot riveting head, ensuring the accuracy of temperature measurement, avoiding the need to disassemble the hot riveting head during calibration, and making calibration convenient.

Description

Technical Field

[0001] This application belongs to the field of distribution valve manufacturing technology, and in particular relates to a hot riveting head for distribution valves. Background Technology

[0002] When installing a metal valve core into a pneumatic distribution valve, a hot riveting process is typically used to secure the valve core within the plastic housing and achieve high connection strength to meet burst pressure requirements. The hot riveting process involves heating the plastic housing with a hot riveting head, transforming it into a more fluid state, and then wrapping and fixing it onto the valve core. However, after a period of use, the temperature of the hot riveting head is prone to deviation. Utility Model Content

[0003] To address the technical problem of temperature deviation in existing hot riveting heads, this application provides a hot riveting head for distribution valves.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is a hot riveting head for a distribution valve, including a mounting rod and a hot riveting head installed at one end of the mounting rod; at least one heating rod and at least one temperature measuring thermocouple are provided inside the mounting rod; the mounting rod is also provided with a reserved calibration hole, which is configured to install a calibration thermocouple when temperature calibration is required.

[0005] In some embodiments, one end of the mounting rod is provided with a connecting flange, and the other end is provided with an internal thread. One end of the hot riveting head is provided with an external thread that matches the internal thread. The hot riveting head and the mounting rod are fixedly connected by the thread.

[0006] In some embodiments, the mounting rod is provided with a heating hole for mounting the heating rod and a temperature measuring hole for mounting the temperature measuring thermocouple.

[0007] In some embodiments, the temperature-sensing thermocouple extends to the location of the heat-sensing head.

[0008] In some embodiments, the hot riveting head has a hot riveting cavity with one end open, and a stepped surface is provided in the hot riveting cavity near the end of its opening.

[0009] In some embodiments, the stepped surface is conical.

[0010] In some embodiments, the edge of the opening end of the hot riveting cavity is further provided with a flange, the flange extending in a direction away from the mounting rod.

[0011] In some embodiments, a pressure block is provided at one end of the hot riveting cavity away from its opening end, and the pressure block is movably disposed within the hot riveting cavity by means of an elastic element.

[0012] In some embodiments, the inner wall of the hot riveting cavity is provided with a guide groove, and the pressure block is provided with a guide block that slides with the guide groove.

[0013] In some embodiments, the elastic element is a spring or a rubber pad.

[0014] Beneficial effects: This application incorporates a heating rod and a temperature-measuring thermocouple within the mounting rod, enabling the heating and temperature control of the hot riveting head. After the hot riveting head has been running for a period of time, a calibration thermocouple is installed in the pre-reserved calibration hole to calibrate the working temperature of the hot riveting head, ensuring accurate temperature measurement and avoiding the need to disassemble the hot riveting head during calibration, thus facilitating the calibration process. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the three-dimensional structure of the hot riveting head;

[0016] Figure 2 This is a sectional view of the hot riveting head;

[0017] Figure 3 This is a schematic diagram of the three-dimensional structure of the mounting rod;

[0018] Figure 4 This is a schematic diagram of the three-dimensional structure of the hot riveting head;

[0019] Figure 5 This is a sectional view of a hot riveting head;

[0020] In the figure: 1. Mounting rod, 11. Heating hole, 12. Temperature measuring hole, 13. Reserved calibration hole, 14. Connecting flange, 2. Hot riveting head, 21. Hot riveting cavity, 211. Guide groove, 22. Step surface, 23. Elastic element, 24. Pressure block, 241. Guide block, 25. Flange. Detailed Implementation

[0021] The present application will be further described below with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without making creative changes are within the protection scope of the present application.

[0022] like Figures 1-2As shown, this application provides a hot riveting head for a distribution valve, comprising a mounting rod 1 and a hot riveting head 2 mounted on one end of the mounting rod 1. At least one heating rod and at least one temperature-sensing thermocouple are disposed within the mounting rod 1. The heating rod heats the mounting rod 1 and the hot riveting head 2, while the temperature-sensing thermocouple monitors the hot riveting temperature in real time, thereby precisely controlling the hot riveting temperature. The hot riveting head 2 is preferably made of a high thermal conductivity material, such as beryllium copper. The hot riveting head 2 is made of Cr12MOV high-carbon, high-chromium cold work die steel, which maintains high hardness and excellent wear resistance at high temperatures, resulting in a long service life. After the hot riveting head has been used for a period of time, the temperature-sensing thermocouple may exhibit some measurement deviation. A reserved calibration hole 13 is provided on the mounting rod 1, configured to install a calibration thermocouple when temperature calibration is required. The calibration thermocouple is periodically installed in the reserved calibration hole 13 for temperature calibration to ensure the accuracy of temperature measurement.

[0023] To facilitate temperature adjustment, a temperature controller is also provided in some embodiments. The temperature-measuring thermocouple transmits the detected temperature signal to the temperature controller in real time, and then the temperature controller controls the heating state of the heating rod. During the riveting process, the set stability is adjusted by PID to keep it within a certain tolerance range, so as to achieve precise temperature control of the hot riveting head.

[0024] like Figures 3-5 As shown, for ease of installation, in some embodiments, the mounting rod 1 is provided with a connecting flange 14 at one end, which can be used to fix the mounting rod 1 to the riveting equipment, and the other end is provided with an internal thread. The hot riveting head 2 is provided with an external thread that matches the internal thread at one end, and the hot riveting head 2 is fixedly connected to the mounting rod 1 by the thread.

[0025] like Figure 1 , Figure 2 and Figure 3 As shown, to facilitate the installation of the heating rod and thermocouple, in some embodiments, the mounting rod 1 is provided with a heating hole 11 for installing the heating rod and a temperature measuring hole 12 for installing the temperature measuring thermocouple. For example... Figure 1 As shown, in some embodiments, two heating rods and two temperature-sensing thermocouples are provided, with corresponding two heating holes 11 and two temperature-sensing holes 12. The two heating holes 11 are symmetrically distributed on the mounting rod 1, and the two temperature-sensing holes 12 are also symmetrically distributed on the mounting rod 1. Installing two heating rods enables rapid heating of the hot riveting head, and installing two temperature-sensing thermocouples improves the accuracy of temperature monitoring and acquisition.

[0026] like Figure 2 and 3As shown, in some embodiments, the temperature measuring hole 12 is extended to the position of the hot riveting head 2, so that the temperature measuring thermocouple extends to the position of the hot riveting head 2, so as to collect the temperature at the position of the hot riveting head 2.

[0027] To improve the heat riveting effect and ensure the valve core is firmly encased in the plastic housing, in some embodiments, such as... Figure 2 , Figure 4 and Figure 5 As shown, the hot riveting head 2 has a hot riveting cavity 21 with one end open, and a stepped surface 22 is provided inside the hot riveting cavity 21 near its opening end. The stepped surface 22 can make the bottom of the hot riveting structure have a certain thickness, which is beneficial to the strength of the hot riveting connection between the housing and the valve core.

[0028] To improve the effect of hot riveting, such as Figure 5 As shown, in some embodiments, the stepped surface 22 is a conical surface. Setting the stepped surface 22 as a conical surface allows the molten shell adhesive during the hot riveting process to flow and distribute along the conical surface into the cavities above and below the stepped surface 22, avoiding the accumulation of adhesive in the cavities above and below the stepped surface 22, which could lead to uneven adhesive distribution or even adhesive leakage.

[0029] In some embodiments, such as Figure 2 , Figure 4 and Figure 5 As shown, the edge of the opening end of the hot riveting cavity 21 is also provided with a flange 25, which extends in a direction away from the mounting rod 1. The flange 25 is designed with a thin wall structure, which reduces the heat-affected zone around the hot riveting head 2 and is beneficial to the neatness of the molding edge of the rubber material.

[0030] like Figure 2 , Figure 4 and Figure 5 As shown, in some cases, the plastic housing portion connected to the valve core by heat riveting has insufficient adhesive material, failing to effectively fill the heat riveting cavity 21, and even resulting in structural defects such as voids. In some embodiments, a pressure block 24 is provided at the end of the heat riveting cavity 21 away from its opening. The pressure block 24 is movably disposed within the heat riveting cavity 21 via an elastic element 23. Utilizing the design of the movable pressure block 24, when there is insufficient adhesive material in the heat riveting connection portion, the elastic force of the elastic element 23 causes the pressure block 24 to press down on the adhesive material, thereby compacting it and ensuring the effectiveness of the heat riveting. Because the elastic element 23 has compressible properties, the effective heat riveting space of the heat riveting cavity 21 is variable, avoiding void structures or adhesive overflow problems caused by inconsistent adhesive material amounts in the heat riveting area. Furthermore, after heat riveting is completed, the restoring force of the elastic element 23 also facilitates the separation of the heat riveting head 2 from the heat riveted portion of the plastic housing.

[0031] like Figure 4 and 5As shown, to improve the stability of the pressure block 24 within the hot riveting cavity 21, in some embodiments, a guide groove 211 is provided on the inner wall of the hot riveting cavity 21, and a guide block 241 is provided on the pressure block 24 that slides in cooperation with the guide groove 211. The pressure block 24 can be stably and dynamically positioned within the hot riveting cavity 21 through the cooperation of the guide block 241 and the guide groove 211. Simultaneously, the cooperation between the guide block 241 and the guide groove 211 increases the contact area between the pressure block 24 and the inner wall of the hot riveting cavity 21, improving the heat conduction effect.

[0032] Preferably, in some embodiments, the elastic element 23 is a spring or a rubber pad. One end of the elastic element 23 is fixed to the end wall of the hot riveting cavity 21, and the other end is fixed to the pressure block 24. The spring or rubber pad is preferably made of a high-temperature resistant material.

[0033] While the above disclosure is provided, the scope of protection of this disclosure is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this disclosure, and all such changes and modifications will fall within the scope of protection of this application.

Claims

1. A hot riveting head for a distribution valve, characterized in that, It includes a mounting rod (1) and a hot riveting head (2) installed at one end of the mounting rod (1); at least one heating rod and at least one temperature measuring thermocouple are provided inside the mounting rod (1); the mounting rod (1) is also provided with a reserved verification hole (13), which is configured to install a verification thermocouple when temperature verification is required.

2. The hot riveting head for a distribution valve according to claim 1, characterized in that, The mounting rod (1) is provided with a connecting flange (14) at one end and an internal thread at the other end. The hot riveting head (2) is provided with an external thread that matches the internal thread at one end. The hot riveting head (2) and the mounting rod (1) are fixedly connected by the thread.

3. The hot riveting head for a distribution valve according to claim 1, characterized in that, The mounting rod (1) is provided with a heating hole (11) for mounting the heating rod and a temperature measuring hole (12) for mounting the temperature measuring thermocouple.

4. The hot riveting head for a distribution valve according to claim 3, characterized in that, The temperature measuring thermocouple extends to the position of the hot riveting head (2).

5. The hot riveting head for a distribution valve according to claim 1, characterized in that, The hot riveting head (2) has a hot riveting cavity (21) with one end open, and a stepped surface (22) is provided in the hot riveting cavity (21) near the end of its opening.

6. The hot riveting head for a distribution valve according to claim 5, characterized in that, The stepped surface (22) is conical.

7. The hot riveting head for a distribution valve according to claim 5, characterized in that, The edge of the opening end of the hot riveting cavity (21) is also provided with a flange (25), which extends in a direction away from the mounting rod (1).

8. The hot riveting head for a distribution valve according to any one of claims 5 to 7, characterized in that, A pressure block (24) is provided at one end of the hot riveting cavity (21) away from its opening end. The pressure block (24) is movably disposed in the hot riveting cavity (21) by means of an elastic element (23).

9. The hot riveting head of the distribution valve according to claim 8, characterized in that, The inner wall of the hot riveting cavity (21) is provided with a guide groove (211), and the pressure block (24) is provided with a guide block (241) that slides with the guide groove (211).

10. The hot riveting head for a distribution valve according to claim 9, characterized in that, The elastic element (23) is a spring or a rubber pad.

Images