High-temperature melt pressure sensor with small probe

Abstract

The utility model relates to the technical field of pressure sensors, and discloses a fine probe high-temperature melt pressure sensor, which comprises a probe, a high-pressure soft capillary tube, a protective shell and a cable, the right end of the high-pressure soft capillary tube is connected with the protective shell, the right end of the protective shell is connected with the cable, and the cable is connected with the high-pressure soft capillary tube. And the right end of the probe is fixedly connected with a baffle plate. According to the utility model, by changing the medium conduction form of the probe, not penetrating through the capillary tube at the probe and increasing the single-side wall thickness of the probe, the probe can resist higher pressure, and by welding the high-pressure soft capillary tube at the baffle, the inner hole of the capillary tube can be ensured to be smooth and not blocked, and the influence on the welding strength of the capillary tube welding point when the soft capillary tube shakes and bends can be effectively prevented; the size phi of the probe is only 4 mm, the probe is a static high-temperature melt pressure sensor which can be interchanged with a dynamic pressure sensor, and the problem that the static pressure in a mold cavity cannot be accurately measured during mold forming is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure sensors, in particular to a high-temperature melt pressure sensor with a small probe. Background Art

[0002] High temperature melt pressure sensors are mainly used to measure and control the pressure information of molten materials in the injection molding and chemical fiber industries. The industry standard temperature probe is currently φ6mm. In the injection molding industry, if the mold is very small, the current standard high temperature melt product size is difficult to install. This specific application requires a smaller probe size to be directly installed in the mold to measure the peak cavity pressure.

[0003] At present, in order to measure the pressure in the small mold cavity, dynamic pressure sensors are used to measure the pressure. However, dynamic pressure sensors can only measure the pressure generated after the fluid flows. When the mold molding needs to maintain pressure, it is impossible to measure the actual pressure in the static mold cavity. The traditional high-temperature melt solution is to pass a φ1.6mm capillary in the middle of the probe to fill the medium. However, when the diameter of the isolation diaphragm is 4mm, if a capillary is passed in the middle, the thickness of one side of the probe is only 1.2mm. When the pressure is greater than 35MPa, the thin wall of one side of the probe cannot withstand such a large pressure and will sink, causing the sensor diaphragm to deform, thereby affecting the performance of the product. Therefore, a small probe high-temperature melt pressure sensor is proposed to solve the above-mentioned problems. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a high-temperature melt pressure sensor with a small probe in view of the deficiencies in the above-mentioned prior art.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a small probe high-temperature melt pressure sensor, comprising: a probe, a high-pressure soft capillary, a protective shell and a cable, the right end of the high-pressure soft capillary is connected to the protective shell, and the right end of the protective shell is connected to the cable;

[0006] The right end of the probe is fixedly connected with a baffle, and a high-pressure soft capillary is fixedly connected to the baffle. The baffle and the high-pressure soft capillary are fixedly connected by laser welding, and the baffle and the probe are fixedly connected by laser welding. The high-pressure soft capillary is welded to the baffle to ensure that the inner hole of the capillary is unobstructed and not blocked.

[0007] A pressure-conducting hole is provided inside the probe, and an isolation diaphragm is fixedly connected to the left end of the probe. The material of the probe is tungsten steel. The isolation diaphragm and the probe are fixed by welding to form a closed space that can be filled with a pressure-conducting medium.

[0008] Preferably, a pressure-sensitive element is disposed inside the protective shell, and the left end of the high-pressure soft capillary is welded to the pressure-sensitive element. The provision of the protective shell can protect the pressure-sensitive element.

[0009] Preferably, the size of the pressure-conducting hole is φ0.25 mm, and the right end of the pressure-conducting hole is butted against the left end of the high-pressure soft capillary, and the function of the pressure-conducting hole is equivalent to the inner hole of the capillary.

[0010] Preferably, a mounting tube is provided on the right side of the baffle, and the high-pressure soft capillary tube runs through the interior of the mounting tube. By arranging the mounting tube to be movable, the mounting tube can be easily installed.

[0011] Preferably, a mounting thread is provided on the outer wall of the mounting tube, and the size of the probe is φ4 mm. The provision of the mounting thread can facilitate the installation and fixation of the mounting tube.

[0012] Preferably, the protective shell is provided with a wire protection threaded barrel, the baffle is provided with an oxygen welding point, and the baffle is provided with a capillary welding point. The setting of the wire protection threaded barrel can protect the cable, and the oxygen welding point is the welding point between the baffle and the high-pressure soft capillary. The high-pressure soft capillary and the baffle can be welded and fixed at the oxygen welding point. The capillary welding point is the second welding point between the baffle and the high-pressure soft capillary. The high-pressure soft capillary and the baffle can be welded and fixed for the second time at the capillary welding point. The high-pressure soft capillary and the baffle adopt two welding positions, namely the oxygen welding point and the capillary welding point, which can make the high-pressure soft capillary and the baffle more firm and stable, and avoid the problem of the high-pressure soft capillary detaching from the baffle.

[0013] The utility model adopts the above technical solution, which can bring the following beneficial effects:

[0014] This tiny probe high-temperature melt pressure sensor changes the form of the probe's conductive medium, does not pass through the capillary at the probe, increases the single-side wall thickness of the probe, and enables it to withstand greater pressure. The high-pressure soft capillary is welded to the baffle to ensure that the inner hole of the capillary is unobstructed and not blocked, and can effectively prevent the soft capillary from shaking and bending, which affects the welding strength of the capillary welding point. The probe size is only φ4mm, and it is a static high-temperature melt pressure sensor that can be interchangeable with a dynamic pressure sensor. It solves the problem of being unable to accurately measure the static pressure in the mold cavity during mold forming. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 for Figure 1 A schematic diagram of the enlarged structure in the middle.

[0017] In the figure: 1. Isolation diaphragm; 2. Probe; 3. Baffle; 4. High-pressure soft capillary; 5. Oxygen welding point; 6. Installation thread; 7. Protective shell; 8. Wire protection thread barrel; 9. Cable; 10. Capillary welding point; 11. Pressure guide hole; 12. Installation tube. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "setting" should be understood in a broad sense, for example, they can be fixedly connected or set, or detachably connected or set, or integrally connected or set. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] See also Figure 1-2 The technical solution of the utility model is: a small probe high temperature melt pressure sensor, including: a probe 2, a high pressure soft capillary 4, a protective shell 7 and a cable 9, the right end of the high pressure soft capillary 4 is connected to the protective shell 7, and the right end of the protective shell 7 is connected to the cable 9. By changing the form of the conductive medium of the probe 2, the capillary is not passed through the probe 2, and the single-side wall thickness of the probe 2 is increased, so that it can withstand greater pressure;

[0022] The right end of the probe 2 is fixedly connected with a baffle 3, and a plug-in slot is provided on the left wall of the baffle 3. The right end of the probe 2 is plugged into the inside of the plug-in slot. The setting of the plug-in slot can facilitate the docking of the probe 2 and the baffle 3, thereby facilitating accurate laser welding between the probe 2 and the baffle 3. A high-pressure soft capillary 4 is fixedly connected to the baffle 3. The fixed connection between the baffle 3 and the high-pressure soft capillary 4 is laser welded to prevent the high-pressure soft capillary 4 from shaking and bending, which affects the welding strength of the capillary welding point 10. The fixed connection between the baffle 3 and the probe 2 is laser welded to weld the high-pressure soft capillary 4 to the baffle 3, which can ensure that the inner hole of the capillary is unobstructed and not blocked.

[0023] A pressure conducting hole 11 is provided inside the probe 2. An isolation diaphragm 1 is fixedly connected to the left end of the probe 2. The material of the probe 2 is tungsten steel. The isolation diaphragm 1 and the probe 2 are fixed by welding to form a closed space that can be filled with a pressure conducting medium.

[0024] A pressure-sensitive element is arranged inside the protective shell 7 , and the left end of the high-pressure soft capillary 4 is welded to the pressure-sensitive element. The arrangement of the protective shell 7 can protect the pressure-sensitive element.

[0025] The size of the pressure-conducting hole 11 is φ0.25 mm, and the right end of the pressure-conducting hole 11 is connected to the left end of the high-pressure soft capillary 4. The function of the pressure-conducting hole 11 is equivalent to the inner hole of the capillary, and the inner diameter of the pressure-conducting hole 11 is the same as the inner diameter of the high-pressure soft capillary 4.

[0026] A mounting tube 12 is provided on the right side of the baffle 3, and the high-pressure soft capillary 4 passes through the interior of the mounting tube 12. By setting the mounting tube 12 to be movable, the mounting tube 12 is located between the baffle 3 and the protective shell 7, and can move left and right between the baffle 3 and the protective shell 7 along the high-pressure soft capillary 4, so that the mounting tube 12 can be easily installed.

[0027] The outer wall of the mounting tube 12 is provided with mounting threads 6 . The size of the probe 2 is φ4 mm. The arrangement of the mounting threads 6 can facilitate the installation and fixation of the mounting tube 12 .

[0028] A wire protection threaded barrel 8 is provided on the protection shell 7, and the setting of the wire protection threaded barrel 8 can protect the cable 9. An oxygen welding point 5 is provided on the baffle 3, and a capillary welding point 10 is provided on the baffle 3. The oxygen welding point 5 is a welding point between the baffle 3 and the high-pressure soft capillary 4. The high-pressure soft capillary 4 can be welded and fixed to the baffle 3 at the oxygen welding point 5. The capillary welding point 10 is a second welding point between the baffle 3 and the high-pressure soft capillary 4. The high-pressure soft capillary 4 can be welded and fixed to the baffle 3 for the second time at the capillary welding point 10. The high-pressure soft capillary 4 and the baffle 3 adopt two welding positions, namely the oxygen welding point 5 and the capillary welding point 10, which can make the high-pressure soft capillary 4 and the baffle 3 more firm and stable, and avoid the problem of the high-pressure soft capillary 4 detaching from the baffle 3.

[0029] By changing the form of the probe 2 conducting medium, the capillary is not passed through the probe 2, and the single-side wall thickness of the probe 2 is increased to enable it to withstand greater pressure. The high-pressure soft capillary 4 is welded to the baffle 3 to ensure that the inner hole of the capillary is unobstructed and not blocked, and can effectively prevent the high-pressure soft capillary 4 from shaking and bending, which affects the welding strength of the capillary welding point 10. The probe 2 has a size of only φ4mm and is a static high-temperature melt pressure sensor that can be interchangeable with a dynamic pressure sensor. It solves the problem of being unable to accurately measure the static pressure in the mold cavity during mold forming.

[0030] The utility model provides a small probe high temperature melt pressure sensor. There are many methods and ways to implement the technical solution. The above is only the preferred implementation of the utility model. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model. These improvements and modifications should also be regarded as the protection scope of the utility model. All components not specified in this embodiment can be implemented by existing technologies.

Claims

1. A small probe high temperature melt pressure sensor, characterized in that: include: A probe (2), a high-pressure soft capillary (4), a protective shell (7) and a cable (9), wherein the right end of the high-pressure soft capillary (4) is connected to the protective shell (7), and the right end of the protective shell (7) is connected to the cable (9); The right end of the probe (2) is fixedly connected to a baffle (3), and a high-pressure soft capillary (4) is fixedly connected to the baffle (3); A pressure-conducting hole (11) is provided inside the probe (2), and an isolation diaphragm (1) is fixedly connected to the left end of the probe (2).

2. The high-temperature melt pressure sensor with a small probe according to claim 1, characterized in that: A pressure-sensitive element is arranged inside the protective shell (7), and the left end of the high-pressure soft capillary (4) is welded to the pressure-sensitive element.

3. The high-temperature melt pressure sensor with a small probe according to claim 1 is characterized in that: The size of the pressure-conducting hole (11) is φ0.25 mm, and the right end of the pressure-conducting hole (11) is butt-jointed with the left end of the high-pressure soft capillary (4).

4. The high-temperature melt pressure sensor with a small probe according to claim 1, characterized in that: A mounting tube (12) is provided on the right side of the baffle (3), and the high-pressure soft capillary tube (4) passes through the interior of the mounting tube (12).

5. The high-temperature melt pressure sensor with a small probe according to claim 4, characterized in that: The outer wall of the mounting tube (12) is provided with a mounting thread (6), and the size of the probe (2) is φ4 mm.

6. The high-temperature melt pressure sensor with a small probe according to claim 1, characterized in that: The protective shell (7) is provided with a threaded wire protection tube (8), the baffle plate (3) is provided with an oxygen welding point (5), and the baffle plate (3) is provided with a capillary welding point (10).

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