JPH0248415Y2 - - Google Patents

Description

[Detailed explanation of the invention] (Industrial application field) This invention is mainly applicable to vertical furnaces such as blast furnaces.
It relates to a device that sends a probe to measure the surface condition and temperature of raw materials in a furnace.

(Prior Art) Conventionally, electric drive type and hydraulic cylinder drive type have been known as devices for feeding this type of probe, and in general, hydraulic cylinder drive type allows the hydraulic pressure generating device to be installed at any location, and It is widely used because it is easy to maintain and quiet.

On the other hand, in order to detect the surface condition of the raw material in the furnace, mechanical detection is carried out by suspending a weight from a probe, and non-contact detection is carried out using microwaves or gas lasers.

In addition, the area around the probe being sent is sealed,
As a device for preventing gas leakage in a blast furnace, a sealing device that seals by applying fluid pressure is known, as proposed by the present inventor in Japanese Patent Application Laid-Open No. 51-127772.

(Problem that the invention aims to solve) The probe inserted into the furnace is supported with its root part in a cantilevered manner on the side wall of the furnace, so it tends to vibrate, and this vibration is amplified at the tip of the probe. When a transmitting/receiving antenna is provided on the tip side of the microwave to investigate the surface condition of the raw material, this is not preferable because it causes errors in the measured values and decreases the measurement accuracy.

Furthermore, since there is pressure gas containing toxic gas inside the furnace, the area around the probe is sealed, but dust from inside the furnace can enter the seal and mix with grease etc., which can impair the sliding properties of the probe. significantly worsen,
This causes an increase in the propulsion force and vibration of the probe.

SUMMARY OF THE INVENTION An object of the present invention is to provide a probe feeding device that can prevent vibration of the probe to improve measurement accuracy and prevent deterioration of operation due to dust.

(Means for Solving the Problems) In the present invention, a probe for measuring data such as the surface condition and temperature of the raw material inside the furnace is provided on the side wall of the furnace so that it can appear and retract from the side wall. A probe insertion hole equipped with a gate valve and a sealing device is formed, and a probe is provided in the probe insertion hole so as to be retractable through a relatively long support tube, and the probe is retractably installed in either the tube or the rod of the hydraulic cylinder. The above-mentioned problem can be solved by tying the support tube to one side and tying the probe to the other side via a releasable gripping device, and providing a releasable locking device for locking each of the tube and rod of the hydraulic cylinder. I tried to resolve the issue.

(Function) When a support tube is tied to the tube of a hydraulic cylinder and a probe is tied to the rod via a gripping device, and the probe is inserted into the furnace for measurement, the gripping device is released and then the hydraulic Supply pressure oil to the piston head side of the cylinder. As a result, the tube of the hydraulic cylinder moves forward into the probe insertion hole together with the support tube and the probe, and enters the furnace through the opened gate valve. Subsequently, the gripping device is activated to integrate the probe and the rod of the hydraulic cylinder, and supply pressure oil to the rod side of the hydraulic cylinder. As a result, the rod of the hydraulic cylinder advances the probe into the furnace through the support cylinder, and, for example, the surface condition of the raw material in the furnace is measured by a microwave transmitting/receiving antenna provided at the tip of the probe. In this case, the probe is guided while being supported by a relatively long support tube while passing through the furnace wall where vibrations are likely to occur, and thereafter passes through the support tube and is introduced into the furnace. This prevents vibrations that tend to occur and improves measurement accuracy. Further, when the probe is not in use, the probe can be removed and stored in the furnace outside the gate valve together with the support tube, and dust can be prevented from entering the furnace between the support tube and the probe. It is possible to prevent deterioration of sliding properties between the support tube and the probe.

(Embodiment) To explain the case where the embodiment of the present invention is applied to a probe for measuring the surface condition of raw material in a blast furnace using microwaves, in FIGS. 2 shows a cylindrical probe that is provided so as to be retractable through the side wall 1 to measure the surface condition of the raw material 3 in the furnace. A window 2a is formed at the tip of the probe 2, and a window 2a is formed in the tip of the probe 2, and a window 2a is formed at the tip of the probe 2. An antenna 5 connected to a circuit box 4 is provided to be exposed to the outside, and a microwave control device 6 is attached to the rear end of the probe 2.

If vibration occurs when the probe 2 is introduced into the furnace, the amplitude of the tip will be amplified and become larger, and the error in the distance between the surface of the raw material 3 and the antenna 5 will increase, causing the surface condition of the raw material 3 to change. This is undesirable as it skews the measurement.

Therefore, in the present invention, a probe insertion hole 9 equipped with a gate valve 7 and a sealing device 8 is formed in the side wall 1,
A relatively long support tube 10 that can be freely projected and retracted is provided there, and the probe 2 is provided so that the probe 2 can be freely retracted and retracted by inserting the support tube 10 through the support tube 10. Furthermore, on the outside of the side wall 1,
A hydraulic cylinder 11 is provided in parallel with the probe 2, and the support tube 10 is tied to the tube 12 of the hydraulic cylinder 11, and the probe 2 is tied to the rod 13 via a gripping device 14, and the tube 12 is placed on a suitable fixing table. A locking device 15, 16 for locking the rod 13 is provided.

The sealing device 8 has almost the same structure as that described in the above-mentioned Japanese Patent Application Laid-Open No. 51-127772, and when pressure oil is introduced through the oil passage 17, the rubber packing 18 deforms and the support cylinder 10 is closed. The outer periphery was sealed. The support tube 10 also has a sealing device 1 similar to the sealing device 8.
9 was provided to seal the gap between the support tube 10 and the probe 2 to prevent leakage of gas in the furnace.

Furthermore, the gripping device 14 and the securing devices 15 and 16 are
As shown in FIG. 4, a pressure oil introduction space 21 is formed in the hollow cylinder 20, and when pressure oil acts on the space 21, the inner wall 20a of the space 21 is connected to the engagement portions 12a and 13a of the probe 2, tube 12, and rod 13. It is configured to be able to grip or engage the shaft-shaped body 22 by pinching it.

For example, a differential circuit 23 as shown in the figure is connected to the hydraulic cylinder 11, and the tube 12 and rod 1 are connected to each other.
The reciprocating speed of the raw material 3 was set at a constant speed, so that the surface of the raw material 3 could be scanned at a constant speed using the microwave.

In the illustrated embodiment, the probe 2 waits outside the furnace with the gate valve 7 closed, and releases the gripping device 14 and locks the sealing device 19 of the support tube 10 and the locking device of the rod 13 when making measurements inside the furnace. Hydraulic pressure is applied to the chamber 11 on the head side of the hydraulic cylinder 11.
The hydraulic pressure is introduced to a, and the gate valve 7 is opened. As a result, the support cylinder 10 enters the furnace through the probe insertion hole 9 while being accompanied by the probe 2 due to the sealing force of the sealing device 19, resulting in the state shown in the second figure. When this approach is completed, pressure oil is applied to the locking device 15 of the tube 12 and the gripping device 14, the locking device 16 of the rod 13 is released, and the hydraulic pressure is introduced into the chamber 11b of the hydraulic cylinder 11 on the rod side. With this, the rod 13 is attached to the support tube 1.
The probe 2 is introduced into the furnace through the probe 2, and the surface condition of the raw material 3 can be measured using microwaves emitted from the window 2a at its tip.

Since the probe 2 waits outside the furnace outside the gate valve 7 when not in use, it prevents dust in the furnace from entering the sealing devices 8 and 19, and prevents sliding of the support tube 10 and the probe 2. Smoothness can be maintained, and since the probe 2 is introduced into the furnace while being supported by the relatively long support tube 10, vibrations are reduced, and both the probe 2 and the support tube 10 can be operated with one hydraulic cylinder 11. In addition, the probe 2 can be moved significantly.

It is also possible to provide the hydraulic cylinder 11 in the opposite direction, connect the support tube 10 to the rod 13, and connect the probe 2 to the tube 12 via the gripping device 14.

(Effects of the invention) As described above, in the present invention, the probe is supported by a relatively long support tube, and this is inserted into the probe insertion hole provided with the gate valve and the sealing device so as to be freely retractable. As a result, it is possible to prevent deterioration of sliding properties due to dust in the furnace, reduce vibration of the probe, and connect the support tube to one of the tube and rod of the hydraulic cylinder that is anchored by the anchoring device, while gripping the other. Since the probe is connected through the device, a long stroke of the probe can be obtained with a short hydraulic cylinder, and the probe and support tube can be operated, so the device can be made smaller and simpler.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of an embodiment of the present invention, FIGS. 2 and 3 are cross-sectional views of the operating state thereof, and FIG. 4 is a cross-sectional view of an example of a gripping device and a locking device. 1...Side wall, 2...Probe, 3...Raw material, 7
... Gate valve, 8, 19 ... Sealing device, 9 ... Probe insertion hole, 10 ... Support cylinder, 11 ... Hydraulic cylinder, 12 ... Tube, 13 ... Rod, 14
...Gripping device, 15, 16...Latching device.

Claims (1)

[Scope of utility model registration request] In a furnace in which a probe for measuring data such as the surface condition and temperature of the raw material inside the furnace is installed in a removable manner on the side wall of the furnace, a probe insertion hole equipped with a gate valve and a sealing device is formed in the side wall. , a probe is provided in the probe insertion hole so as to be freely retractable through a relatively long support cylinder that can be freely retracted and retracted from the probe, and the support cylinder is connected to either the tube or the rod of the hydraulic cylinder and is releasably attached to the other. 1. A feeding device for a probe for in-furnace measurement, characterized in that it is provided with a releasable locking device that locks the probe through a gripping device and locks each of the tube and rod of the hydraulic cylinder.