A radio frequency admittance cable probe

Abstract

The present invention discloses a radio frequency admittance cable probe, wherein the front clasping mechanism in the probe is provided with two copper tubes for clamping the cable, the inner sleeve provided in the clasping cable mechanism can clamp the surface of the cable installed therein, the inner sleeve in the probe can clamp the surface of the cable installed therein, and the rear clasping mechanism is provided with a copper tube for clamping the cable, and the clasping method in the above structure improves the tensile effect and can withstand a pressure of 2Mpa; a cotton tensile rope is provided in the cable, so that the tensile strength of the cable is extremely strong and can withstand 300 kilograms; the shielding layer of the cable can achieve a strong anti-hanging effect, and the test is more stable. Through the mutual cooperation of the above structures, the measuring range of the present invention in a liquid environment can reach up to 40 meters at most, and the measuring range in a solid environment can reach up to 20 meters at most.

Description

Technical Field

[0001] The invention belongs to the technical field of object level detection, and relates to a detection structure of radio frequency admittance technology, in particular to a radio frequency admittance cable probe. Background Art

[0002] The RF admittance principle measurement technology is an improved level measurement technology. This technology uses RF signals and adds a Driving-Shield circuit. The Driving-Shield circuit can shield interference signals and signals generated by non-material changes, and can also prevent RF current from forming a loop through hanging materials. The impact of hanging materials can be identified, and the influence of hanging materials on the measurement at the probe end can be eliminated from the total output through the phase shift of the bridge. The cable type RF admittance level switch in the RF admittance level switch is mainly used for the measurement of solid powder and particles in large tanks and silos. It is generally installed vertically to effectively avoid the impact of materials.

[0003] For example, the Chinese invention patent with the patent number 201720633507X and the name of a new type of radio frequency admittance level meter discloses a detection structure mainly composed of a meter head 1, a controller 2, a sensor 4, an extension line 11 and a detection head 12, wherein the sensor 4 is composed of a ground electrode layer 5, an insulating layer 1 6, a shielding layer 7, an insulating layer 2 8 and a detection electrode 9 from the outside to the inside, and the connection port 10 of the detection electrode is connected to the detection head 12 through an extension line 11. The sensor structure, the extension line and the detection head structure in the above structure may be further optimized to achieve a larger range, tensile strength and anti-hanging effect. Summary of the invention

[0004] The purpose of the present invention is to solve the defects of the prior art and provide a radio frequency admittance cable probe, which achieves good tensile strength, good anti-hanging effect and higher range through the mutual cooperation of various structures.

[0005] The present invention provides the following technical solutions:

[0006] A radio frequency admittance cable probe comprises a sensor, a cable and a probe. The sensor comprises a front embracing mechanism, an embracing cable mechanism and an outer sleeve. The front embracing mechanism is installed at one end of the embracing cable mechanism, and the other end of the embracing cable mechanism is connected to one end of the outer sleeve. The cable is clamped and passed through the front embracing mechanism and the embracing cable mechanism. One end of the cable extending along the embracing cable mechanism to the front embracing mechanism and passing through the front embracing mechanism exposes the internal wire, and the other end of the cable extends along the inside of the outer sleeve and is sealed and passed through the other end of the outer sleeve and then connected to the probe.

[0007] Further: the probe includes an outer sleeve, a rear engaging mechanism and a weight plug, one end of the outer sleeve is sealed and penetrated into the other end of the cable, the other end of the cable extends along the inside of the outer sleeve and is clamped by the rear engaging mechanism arranged inside the other end of the outer sleeve, the other end of the outer sleeve next to the rear engaging mechanism is sealed and installed with the weight plug, and the wire inside the other end of the cable is electrically connected to the weight plug.

[0008] Further: at least one copper tube is arranged in the rear clasping mechanism, and the copper tube clamps the shielding layer or the conductor of the cable installed therein;

[0009] At least one copper tube is arranged inside the front clamping mechanism, and the copper tube clamps the shielding layer or the conductor of the cable installed inside the copper tube.

[0010] Further: the rear clasping mechanism comprises a rear insulating pad and a rear wiring block, the rear insulating block is sleeved inside the other end of the outer sleeve, and the rear wiring block is arranged inside the outer sleeve between the rear insulating block and the heavy hammer plug which is sealed and screwed together at the other end of the outer sleeve;

[0011] The other end of the cable passes through through holes formed inside the rear insulating block and the rear wiring block, and a copper tube for clamping the cable is arranged inside the rear insulating block.

[0012] Further: an inner sleeve is arranged inside the outer sleeve in the probe, and the inner sleeve is clamped on the surface of the cable installed inside.

[0013] Further: the cable embracing mechanism comprises a cable embracing component and an embracing component, the embracing component is arranged in a slot arranged in the cable embracing component, and the embracing component is in contact with a front embracing mechanism embedded in the slot;

[0014] The cable passes through the embracing cable component and the embracing component and then enters into the front embracing mechanism.

[0015] Furthermore: an inner sleeve is inserted into the interior of the bonding cable component, and the inner sleeve clamps the surface of the cable inserted therein.

[0016] Further: the front bonding mechanism includes a front wiring block, a front insulating pad, a shielding wiring block and a shielding insulating pad, the front wiring block, the front insulating pad and the shielding wiring block are arranged adjacent to each other and the end of the shielding wiring block is embedded in the shielding insulating pad, and the shielding insulating pad is embedded in one end of the bonding cable mechanism;

[0017] One end of the cable passes through the through holes formed inside the shielding insulation pad, the shielding wiring block, the front insulation pad and the front wiring block. Copper tubes for clamping the cable are respectively arranged inside the front wiring block and the shielding wiring block.

[0018] Further: a cable connector is installed at two opposite ends of the outer sleeve in the sensor and the outer sleeve in the probe respectively, and the cable seal passes through the two cable connectors.

[0019] Furthermore: a tensile-resistant rope is arranged inside the cable, and a shielding layer is wrapped around the conductor and the tensile-resistant rope.

[0020] The beneficial effects of the present invention are:

[0021] In the present invention, the front clasping mechanism in the sensor is provided with two copper tubes for clamping the cable, the inner sleeve provided in the clasping cable mechanism can clamp the surface of the cable installed therein, the inner sleeve in the probe can clamp the surface of the cable installed therein, and the rear clasping mechanism is provided with a copper tube for clamping the cable. The clasping method in the above structure improves the tensile effect and can withstand a pressure of 2Mpa; a cotton tensile rope is provided in the cable, so that the tensile strength of the cable is extremely strong and can withstand 300 kilograms; the shielding layer of the cable can achieve a strong anti-hanging effect, and the test is more stable. Through the mutual cooperation of the above structures, the range of the present invention used in a liquid environment can reach up to 40 meters at most, and the range used in a solid environment can reach up to 20 meters at most. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is the front view of the present invention.

[0023] Figure 2 for Figure 1 Rear view of.

[0024] Figure 3 for Figure 1 Axial enlarged cross-section.

[0025] Figure 4 for Figure 1 Schematic diagram of the coordination between the sensor end and the cable lead-out device. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] A cable type radio frequency admittance level switch, as shown in the figure, includes a sensor, a cable 9 and a probe. The sensor includes a front clasping mechanism, a clasping cable mechanism, and an outer sleeve 6. The front clasping mechanism is installed at one end of the clasping cable mechanism ( Figure 3 Left side of the superstructure), the other end of the cable mechanism ( Figure 3The right side of the upper structure) connects one end of the outer casing ( Figure 3 On the left side of the upper structure), the front clasping mechanism and the clasping cable mechanism clamp the cable inside, and one end of the cable (at A) extending along the clasping cable mechanism to the front clasping mechanism and passing through the front clasping mechanism exposes the internal wire, and the other end of the cable extends along the inside of the outer casing and is released from the other end of the outer casing ( Figure 3 The probe is connected after the end seal (on the right side of the upper structure) is passed through.

[0028] The probe comprises an outer sleeve, a rear clasping mechanism and a heavy hammer plug 11, one end of the outer sleeve ( Figure 3 The other end of the cable is passed through the left side of the lower structure and extends along the inside of the outer casing and is connected to the other end of the outer casing ( Figure 3 The rear clasping mechanism arranged inside the lower structure (on the right side) is clamped, and a heavy hammer plug is sealed and installed on the other end of the outer sleeve beside the rear clasping mechanism, and the wire inside the other end of the cable (at B) is electrically connected to the heavy hammer plug.

[0029] Inside the cable are at least two conductors and at least two cotton tensile cords ( Figure 3 A conductor and a tensile rope are arranged in the space marked 16), the conductor and the tensile rope are wrapped with aluminum foil, the outer surface of the aluminum foil is wrapped with a tinned copper shielding mesh, the aluminum foil and the tinned copper shielding mesh constitute a shielding layer, and a flame-retardant and oil-resistant PVC sheath 17 is wrapped outside the shielding layer.

[0030] like Figure 3 On the left side of the upper structure, the front clasping mechanism includes a front wiring block 1, a front insulating pad 2, a shielding wiring block 3 and a shielding insulating pad 13. The front wiring block, the front insulating pad and the shielding wiring block are arranged adjacent to each other in sequence and the end of the shielding wiring block ( Figure 3 The right end of the component with the number 3 in the middle) is embedded in the shielding insulation pad, and the shielding insulation pad is embedded in one end of the cable holding mechanism ( Figure 3 One end of the cable passes through the through hole made in the shielding insulation pad, the shielding wiring block, the front insulation pad and the front wiring block. The copper tube 22 for clamping the cable is respectively arranged inside the front wiring block and the shielding wiring block.

[0031] The cable at the copper tube inside the shielded wiring block has the outermost flame-retardant and oil-resistant PVC sheath removed, and the copper tube there is clamped and fastened to the outer surface of the tinned copper shielding net of the cable's shielding layer. The cable at the copper tube inside the front wiring block has the outermost flame-retardant and oil-resistant PVC sheath and the entire shielding layer removed, and the copper tube there is clamped and fastened to the outer surface of the cable's conductor and tensile rope. Openings 12 are provided on the surface of the shielded wiring block and the front wiring block, and each opening is engaged with a hexagonal flat-end set screw 21, which presses and fixes the copper tube.

[0032] The cable embracing mechanism includes a cable embracing component 5 and an embracing component 14, and the embracing component is arranged in a slot ( Figure 3 In the left end of the component with the middle label number 5), the embracing component contacts the shielding terminal block 13 of the front embracing mechanism embedded in the groove, and screw holes 19 are made on the end faces of the embracing component and the corresponding embracing cable component. The embracing component is fixed together with the embracing cable component by multiple bolts 20 engaged in the screw holes. The cable passes through the embracing cable component and the embracing component and then passes into the front embracing mechanism. An inner sleeve 15 is inserted inside the embracing cable component, and the inner sleeve clamps the surface of the cable inserted therein. The left end of the inner sleeve as shown in the figure presses against the surface of the embracing component, and the right end extends into the outer sleeve 6.

[0033] like Figure 3 As shown, the right end 7 of the outer sleeve of the sensor is internally engaged with the end 18 of the cable connector 8, and the cable is sealed and passed through the cable connector; the left end 10 of the outer sleeve of the probe is internally engaged with the end of the cable connector, and the cable is sealed and passed through the cable connector.

[0034] like Figure 3 On the right side of the lower structure, the rear clasping mechanism includes a rear insulating pad 24 and a rear wiring block 25. The rear insulating block is sleeved inside the other end of the outer sleeve, and the left end of the rear insulating block presses against the surface of the insulating ring 23 set inside the outer sleeve 6. The rear wiring block is set inside the outer sleeve between the rear insulating block and the weight plug 11 installed by sealing and screwing at the other end of the outer sleeve. The other end of the cable (at B) passes through the through hole made inside the rear insulating block and the rear wiring block. A copper tube 22 for clamping the cable is set inside the through hole of the rear insulating block. The copper tube is clamped and clamped on the surface of the wire and the tensile rope after removing the flame-retardant and oil-resistant PVC sheath and the entire shielding layer at the other end of the cable. The oxygen-free copper wire inside the wire contacts the metal weight plug and realizes the electrical connection between the copper wire and the weight plug.

[0035] The surface of the rear insulating block is provided with openings 12, each of which is engaged with a hexagonal flat-end set screw 21, which compresses and fixes the copper tube. An inner sleeve is provided inside the outer sleeve in the probe, and the inner sleeve clamps the surface of the cable installed therein. The right end of the inner sleeve as shown in the figure is against the surface of the insulating ring.

[0036] The cables in the outer sleeve of the sensor and the cables in the outer sleeve of the probe are both spaced apart from the inner wall of the outer sleeve.

[0037] The assembly process of the present invention is:

[0038] 1. Cut off the outer skin of the flame-retardant and oil-resistant PVC sheath at the left end of cable 9 to expose the shielding layer.

[0039] 2. First, fix the embracing component 14 and the embracing cable component 5 with bolts 20, and then put the shielding insulation pad 13 on the cable 9.

[0040] 3. Put a copper tube 22 on the surface of the shielding layer of the cable 9 and clamp it tightly.

[0041] 4. Put the shielding terminal block 3 on the above-mentioned clamped copper tube 22 and lock it with the hexagon flat-end set screw 21.

[0042] 5. Insert the front insulating pad 2 into the cable 9 and fit it onto the shielding terminal block 3.

[0043] 6. Put another copper tube 22 on the surface of the wire and tensile rope of the cable 9 with the shielding layer removed, and clamp them tightly.

[0044] 7. Insert the cable 9 into the front terminal block 1 and tighten it with the hexagon socket flat-end set screw 21.

[0045] 8. Put the rear insulating spacer 24 on the cable 9 and insert it into the outer sleeve 6.

[0046] 9. Sleeve the third copper tube 22 over the conductor and tensile rope surface of the cable 9 and press them together, insert it into the rear terminal block 25, lock it with the hexagonal flat-end set screw 21, and finally insert the rear terminal block 25 into the outer sleeve 6.

[0047] 10. Engage the end of the weight plug 11 with the end of the outer sleeve 6 and weld them at the joint gap to ensure internal sealing.

[0048] 11. Insert the front terminal block 1, the front insulating pad 2, the shielding terminal block 3 and the cable 9 inside it into the cable lead-out device 27. The external thread 4 made on the outer surface of the slotted cable component is engaged with the internal thread 28 inside the cable lead-out device. The boss 29 of the cable component covers the opening on the same side of the cable lead-out device. The exposed end of the cable conductor passes through the opening 26 of the cable lead-out device and is connected to the meter head, controller, etc.

[0049] In the present invention, the various structures cooperate with each other, and the measuring range of the present invention in a liquid environment can reach up to 40 meters at most, and the measuring range in a solid environment can reach up to 20 meters at most.

Claims

1. A radio frequency admittance cable probe, comprising a sensor, a cable and a probe, characterized in that: The sensor comprises a front embracing mechanism, an embracing cable mechanism, and an outer sleeve, wherein the front embracing mechanism is installed at one end of the embracing cable mechanism, and the other end of the embracing cable mechanism is connected to one end of the outer sleeve, the front embracing mechanism and the embracing cable mechanism are internally clamped and passed through the cable, one end of the cable extending along the embracing cable mechanism to the front embracing mechanism and passing through the front embracing mechanism exposes the internal wire, and the other end of the cable extends along the inside of the outer sleeve and is sealed and passed through the other end of the outer sleeve and then connected to the probe; The probe comprises an outer sleeve, a rear clasping mechanism and a weight plug, one end of the outer sleeve is sealed and penetrated into the other end of the cable, the other end of the cable extends along the inside of the outer sleeve and is clamped by the rear clasping mechanism arranged inside the other end of the outer sleeve, the other end of the outer sleeve beside the rear clasping mechanism is sealed and installed with the weight plug, and the wire inside the other end of the cable is electrically connected to the weight plug; At least one copper tube is arranged in the rear clasping mechanism, and the copper tube clamps the shielding layer or the conductor of the cable installed in the copper tube; At least one copper tube is arranged inside the front clamping mechanism, and the copper tube clamps the shielding layer or the conductor of the cable installed inside the copper tube; An inner sleeve is provided inside the cable holding mechanism, and the inner sleeve clamps the surface of the cable installed therein; An inner sleeve is arranged inside the outer sleeve of the probe, and the inner sleeve is clamped on the surface of the cable installed inside the inner sleeve; The cable is provided with a tensile-resistant rope inside, and a shielding layer is wrapped around the conductor and the tensile-resistant rope.

2. The radio frequency admittance cable probe according to claim 1, characterized in that: The rear clasping mechanism comprises a rear insulating pad and a rear wiring block, the rear insulating block is sleeved inside the other end of the outer sleeve, and the rear wiring block is arranged inside the outer sleeve between the rear insulating block and a heavy hammer plug which is sealed and screwed together at the other end of the outer sleeve; The other end of the cable passes through through holes formed inside the rear insulating block and the rear wiring block, and a copper tube for clamping the cable is arranged inside the rear insulating block.

3. A radio frequency admittance cable probe according to claim 1 or 2, characterized in that: The cable embracing mechanism comprises a cable embracing component and an embracing component, wherein the embracing component is arranged in a slot arranged in the cable embracing component, and the embracing component contacts with a front embracing mechanism embedded in the slot; The cable passes through the embracing cable component and the embracing component and then enters into the front embracing mechanism.

4. The radio frequency admittance cable probe according to claim 3, characterized in that: An inner sleeve is inserted into the cable-engaging component, and the inner sleeve clamps the surface of the cable inserted therein.

5. A radio frequency admittance cable probe according to claim 1, 2 or 4, characterized in that: The front clasping mechanism comprises a front wiring block, a front insulating pad, a shielding wiring block and a shielding insulating pad. The front wiring block, the front insulating pad and the shielding wiring block are arranged adjacent to each other and the end of the shielding wiring block is embedded in the shielding insulating pad. The shielding insulating pad is embedded in one end of the clasping cable mechanism. One end of the cable passes through the through holes formed inside the shielding insulation pad, the shielding wiring block, the front insulation pad and the front wiring block. Copper tubes for clamping the cable are respectively arranged inside the front wiring block and the shielding wiring block.

6. A radio frequency admittance cable probe according to claim 1, 2 or 4, characterized in that: Two opposite ends of the outer sleeve in the sensor and the outer sleeve in the probe are respectively provided with a cable connector, and the cable seal passes through the two cable connectors.

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