Seal structure of director radar liquid level meter

Abstract

The utility model discloses a director radar liquid level meter sealing structure which comprises a director rod, a corrugated pipe is sleeved outside the director rod, an end cover is fixedly sleeved on the corrugated pipe, a corrugated pipe gland is fixedly installed outside the end cover, a sealing shell is fixedly installed at the bottom end of the corrugated pipe gland, and a gasket is arranged between the sealing shell and the end cover. The first extrusion groove is formed in the sealing shell, the corrugated pipe penetrates through the sealing shell, media are isolated through the corrugated pipe, the media cannot leak out, the service life is greatly prolonged, the use stability is greatly improved, the use occasion of the corrugated pipe is widened, the corrugated pipe is of a double-layer composite structure, the double-protection effect is achieved, and meanwhile during installation, the sealing shell is not prone to being damaged. The corrugated pipe can be directly inserted into the reserved space to be installed, operation is easy, after installation is completed, secondary locking is directly conducted through the pressing ring, the multiple pressing blocks extrude the second extrusion groove, the corrugated pipe is kept tight, and therefore the sealing performance is guaranteed.

Description

Technical Field:

[0001] The utility model relates to the field of guided wave radar level gauges, and particularly relates to a sealing structure of a guided wave radar level gauge. Background Art:

[0002] A guided wave radar level gauge is a level measuring instrument in the chemical industry. The guided wave radar level gauge is a radar level gauge based on the time domain reflectometry (TDR) principle. The electromagnetic pulse of the radar level gauge propagates along the steel cable or the probe rod at the speed of light. When it encounters the surface of the measured medium, part of the pulse of the radar level gauge is reflected to form an echo and returns to the pulse emission device along the same path. The distance between the emission device and the surface of the measured medium is proportional to the propagation time of the pulse between them, and the liquid level height is calculated. The guided wave radar level gauge is applied to water liquid storage tanks, acid and alkali storage tanks, slurry storage tanks, solid particles, small oil storage tanks. All kinds of conductive, non-conductive media, corrosive media. Such as coal bunkers, ash bunkers, oil tanks, acid tanks, etc.

[0003] The guided wave radar level gauge mainly consists of three parts: a radar transmitter, a process seal, and a waveguide rod. The guided wave radar level gauge adopts advanced echo processing and data processing technologies. Coupled with the characteristics of the radar wave itself having a high frequency and good penetration performance, the guided wave radar level gauge has better performance than contact level gauges and similar non-contact level gauges.

[0004] At present, the process seal part of the guided wave radar level gauge adopts an ordinary static seal mode, that is, the sealing effect is achieved through an O-ring. If the O-ring fails, external leakage will occur. However, due to the characteristics of high pressure, high temperature, low temperature, or alternating use of high and low temperatures of the medium, and the reaction of the material corrosion with the O-ring, the seal often fails.

[0005] Therefore, a sealing structure that can stably maintain the seal is needed. Content of the Utility Model:

[0006] The purpose of the utility model is to provide a sealing structure of a guided wave radar level gauge.

[0007] The utility model is implemented by the following technical solutions:

[0008] A sealing structure of a guided wave radar level gauge includes a waveguide rod. A bellows is sleeved outside the waveguide rod. An end cover is fixedly sleeved on the bellows. A bellows gland is fixedly installed outside the end cover. A sealing shell is fixedly installed at the bottom end of the bellows gland. A gasket is arranged between the sealing shell and the end cover. A first extrusion groove is arranged inside the sealing shell. The bellows passes through the sealing shell, and the bellows extends into the first extrusion groove. A slot is arranged at the bottom end of the sealing shell. A flange is fixedly sleeved outside the sealing shell.

[0009] Preferably, the slot is annular in shape, a pressure ring is inserted into the slot, a plurality of second extrusion grooves are evenly arranged annularly on the inner wall of the slot, a pressing block is slidably connected in each second extrusion groove, the side wall of each pressing block is closely attached to the inner ring wall of the pressure ring, and a plurality of bolts are screwed to the bottom end of the pressure ring.

[0010] Advantages of the present utility model: The medium is isolated by the corrugated pipe, so that the medium will not leak out, greatly improving the service life and use stability, and also broadening its application occasions. The corrugated pipe adopts a double-layer composite structure to play a dual protection role. At the same time, during installation, it can be directly inserted into the reserved space for installation, and the operation is simple. After installation, the pressure ring is directly used for secondary locking, so that a plurality of pressing blocks extrude the second extrusion groove, making the corrugated pipe keep tight, thereby ensuring the sealing performance. Description of the drawings:

[0011] Figure 1 It is a schematic diagram of the structure of the present utility model.

[0012] In the figure: the director rod 1, the corrugated pipe gland 2, the end cover 3, the corrugated pipe 4, the sealing housing 5, the first extrusion groove 6, the pressure ring 7, the slot 8, the pressing block 9, the second extrusion groove 10. Specific embodiments:

[0013] As Figure 1 shown, a sealing structure of a director radar level gauge includes a director rod 1, a corrugated pipe 4 is sleeved outside the director rod 1, an end cover 3 is fixedly sleeved on the corrugated pipe 4, a corrugated pipe gland 2 is fixedly installed outside the end cover 3, a sealing housing 5 is fixedly installed at the bottom end of the corrugated pipe gland 2, a gasket is arranged between the sealing housing 5 and the end cover 3, a first extrusion groove 6 is arranged in the sealing housing 5, the corrugated pipe 4 passes through the sealing housing 5, and the corrugated pipe 4 extends into the first extrusion groove 6. A slot 8 is arranged at the bottom end of the sealing housing 5, and a flange is fixedly sleeved outside the sealing housing 5. During installation, a slot 8 is preset in advance, so as to leave a space that can be extruded and moved, so that the corrugated pipe 4 can be directly inserted into the sealing housing 5. Before insertion, the end cover 3 and the upper part of the corrugated pipe 4 are welded, and then the end cover 3 and the corrugated pipe gland 2 are fixed, and at the same time, a gasket for sealing is sleeved to ensure sealing, and then the corrugated pipe gland 2 and the sealing housing 5 are fixed, thus completing the overall installation, and the operation is simple and convenient.

[0014] The slot 8 is in a ring shape, and a compression ring 7 is inserted into the slot 8. A plurality of second extrusion grooves 10 are evenly arranged in a ring on the inner wall of the slot 8. A pressing block 9 is slidably connected in each second extrusion groove 10. The side walls of each pressing block 9 are closely attached to the inner ring wall of the compression ring 7. A plurality of bolts are screwed to the bottom end of the compression ring 7. In order to further ensure the sealing performance, after the installation is completed, a compression ring 7 is directly inserted, so that the plurality of pressing blocks 9 are displaced, and the plurality of second extrusion grooves 10 are extruded, thereby ensuring the stability and compactness of the corrugated pipe 4, and thus ensuring the sealing performance.

[0015] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A sealing structure for a radar level gauge, characterized in that: It includes a director rod, the outer shell of the director rod is provided with a bellows, the bellows is fixedly sleeved with an end cover, a bellows gland is fixedly installed outside the end cover, a sealing shell is fixedly installed on the bottom end of the bellows gland, a gasket is arranged between the sealing shell and the end cover, a first extrusion groove is arranged in the sealing shell, the bellows passes through the sealing shell, and the bellows extends into the first extrusion groove, a slot is arranged at the bottom end of the sealing shell, and a flange is fixedly sleeved outside the sealing shell.

2. The sealing structure of the radar level gauge according to claim 1 is characterized in that: The slot is in a ring shape, a pressure ring is inserted into the slot, a plurality of second extrusion grooves are evenly arranged in a ring shape on the inner wall of the slot, a pressure block is slidably connected in each second extrusion groove, the side wall of each pressure block is tightly fitted with the inner ring wall of the pressure ring, and a plurality of bolts are screwed on the bottom end of the pressure ring.

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