Throw-in type liquid level transmitter line protection layer connecting structure

Abstract

The utility model relates to a throw-in type liquid level transmitter line protection layer connecting structure, which is designed by taking a corrugated pipe protection layer as a starting point and combining a corrugated pipe structure, and comprises a connecting seat of which two ends can be connected, one end is connected with the corrugated pipe, and the other end is connected with a sensor. And meanwhile, the locking structure for fixing the circuit is arranged in the connecting seat, so that the circuit can be prevented from loosening in the corrugated pipe, synchronous load bearing of the corrugated pipe and the circuit on the sensor can be realized, and better integrity is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of sensors, in particular to a circuit protection layer connection structure of an immersion type liquid level transmitter. Background Art

[0002] The liquid level transmitter is an extension and development of the pressure transmitter technology. It is based on the principle that the pressures generated by liquids of different specific gravities at different heights are in a linear relationship. It can accurately measure and transmit the volume, liquid height and weight of water, oil and paste.

[0003] The immersion level transmitter is the most widely used type of level transmitter at present. When in use, it is immersed in the liquid to be measured, and the pressure sensor is used as the measuring element. After the amplification and processing circuit, the gauge pressure or absolute pressure of the measured medium is converted into a standard circuit or current signal. The immersion level transmitter needs a line to connect when in use, and generally uses a gas-conducting cable to transmit the signal. In actual use, the composition of the measured medium varies. Some will cause damage to the line during the liquid level change process, affecting the service life of the overall equipment. There are now related solutions to set up protective layer structures such as bellows on the outside of the line, but the key point that is more difficult to solve is the connection between the protective layer and the line and the sensor. It is necessary to protect the line, ensure that the protective layer fixes the line and the sensor, and take into account a certain degree of sealing. This is a difficult problem encountered in the current protective layer solution. Summary of the invention

[0004] The utility model is a connection structure for a circuit protection layer of an immersion liquid level transmitter, which is a connection structure designed based on a bellows-like protection layer and in combination with the structure of the bellows. It includes a connection seat with both ends that can be connected, one end is connected to the bellows, and the other end is connected to the sensor. At the same time, a locking structure for fixing the circuit is arranged in the connection seat, which can prevent the circuit from loosening in the bellows and can also realize the synchronous load-bearing of the bellows and the circuit on the sensor, thereby achieving better integrity.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A circuit protection layer connection structure for a submersible liquid level transmitter comprises a connection seat, an end cap arranged on the upper part of the connection seat, and an intermediate seat arranged on the lower part of the connection seat; the connection seat as a whole is a tubular structure penetrating from top to bottom, and an annular boss is arranged at the inner center of the connection seat; a bellows is inserted into the connection seat above the boss, and a bellows sealing ring is arranged between the bellows and the connection seat, the end cap is an annular structure, and the end cap presses the bellows sealing ring so that it fills between the bellows and the connection seat; an internal thread is arranged on the inner wall of the connection seat at the lower part of the boss, the upper part of the intermediate seat is connected to the connection seat at the lower part of the boss, and the lower part of the intermediate seat is connected to a sensor; the intermediate seat is also a hollow structure, and the circuit passes through the bellows, passes through the connection seat and the intermediate seat, and is connected to the sensor.

[0007] A mounting ring is also provided at the bottom of the bellows, the outer portion of the mounting ring matches the inner wall of the connecting portion, a spiral head extending upward is provided at the center of the mounting ring, and the spiral head is screwed into the bellows; the bellows sealing ring supports the mounting ring.

[0008] Furthermore, the end face of the mounting ring is a U-shaped structure, and the bellows sealing ring is a stepped structure; the bellows is screwed into the mounting ring, the lower half of the bellows sealing ring is inserted between the bellows and the mounting ring, and the upper half of the bellows sealing ring corresponds to between the bellows and the inner wall of the connecting seat.

[0009] The top and bottom of the bellows sealing ring are both provided with inclined chamfers.

[0010] A circuit sealing ring is also provided between the intermediate seat and the circuit.

[0011] A step portion is provided in the middle seat, the line sealing ring is an L-shaped structure, the bottom of the line sealing ring is supported to the step portion, a gap is left between the line sealing ring and the middle seat, and a locking ring is provided in the gap.

[0012] The lower part of the locking ring is inserted between the line sealing ring and the middle seat, and an annular support plate is provided on the upper part of the locking ring, and the support plate corresponds to the top of the middle seat; the support plate is provided with evenly distributed locking teeth, and the locking teeth are distributed in a ring shape around the line sealing ring on the support plate, and the top of the locking teeth is flush with the top of the line sealing ring; the bottom of the boss is provided with an inclined slope, and the middle seat supports the support plate and the locking ring upward so that the locking teeth are close to the center to press the line sealing ring to achieve locking and sealing of the line.

[0013] Furthermore, the locking teeth are of a sheet-like structure, and are arranged on the support plate to be tilted to one side as a whole; when the locking ring moves upward as a whole, under the limitation of the slope, the locking teeth are stacked layer by layer to press the outer edge of the line sealing ring.

[0014] The utility model adopts the above technical solution to achieve the following beneficial effects:

[0015] The upper and lower parts of the connection structure of the device are connected to the bellows and the sensor respectively to achieve a reliable connection between the two. The arrangement of the mounting ring and the bellows sealing ring makes the connection of the bellows both firm and has a good sealing effect; the line sealing ring and the corresponding locking ring structure also fix and seal the line and the connecting seat. This structure can prevent the line from loosening in the bellows, and can also achieve synchronous load-bearing of the bellows and the line on the sensor, thereby achieving better integrity. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the utility model.

[0017] Figure 2 It is a cross-sectional view of the utility model.

[0018] Figure 3 It is a disassembly schematic diagram of the utility model.

[0019] Figure 4 for Figure 3 It is a cross-sectional view.

[0020] Figure 5 Schematic diagram of line sealing ring and locking ring. DETAILED DESCRIPTION

[0021] The present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be clear that the following embodiments are only one or more manifestations of the present invention and are not intended to be a complete limitation of the invention described in this application. Any improvements known to those skilled in the art made on the basis of the invention or technical solutions described in this application should fall within the scope of protection claimed in this application.

[0022] like Figure 1-Figure 5 The circuit protection layer connection structure of a submersible liquid level transmitter shown in the figure comprises a connection seat 1, an end cap 2 arranged on the upper part of the connection seat 1, and an intermediate seat 3 arranged on the lower part of the connection seat 1; the connection seat 1 is a tubular structure that penetrates from top to bottom as a whole, and an annular boss 101 is provided at the inner center of the connection seat 1; the bellows 4 is inserted into the connection seat 1 above the boss 101, and a bellows sealing ring 401 is provided between the bellows 4 and the connection seat 1, the end cap 2 is an annular structure, and the end cap 2 presses the bellows sealing ring 401 so that it fills between the bellows 4 and the connection seat 1; an internal thread is provided on the inner wall of the connection seat 1 below the boss 101, the upper part of the intermediate seat 3 is connected to the connection seat 1 below the boss 101, and the lower part of the intermediate seat 3 is connected to the sensor 5; the intermediate seat 3 is also a hollow structure, and the line 6 passes through the bellows 4, passes through the connection seat 1 and the intermediate seat 3 and is connected to the sensor 5.

[0023] A mounting ring 402 is also provided at the bottom of the bellows 4, the outer portion of the mounting ring 402 cooperates with the inner wall of the connecting portion 1, and a spiral head 403 extending upward is provided at the center of the mounting ring 402, and the spiral head 403 is screwed into the bellows 4; the bellows sealing ring 401 supports the mounting ring 402.

[0024] Furthermore, the end face of the mounting ring 402 is a U-shaped structure, and the bellows sealing ring 401 is a stepped structure; the bellows 4 is screwed into the outside of the spiral head 403 on the mounting ring 402, the lower half of the bellows sealing ring 401 is inserted between the bellows 4 and the mounting ring 402, and the upper half of the bellows sealing ring 401 corresponds to between the bellows 4 and the inner wall of the connecting seat 1.

[0025] The top and bottom of the bellows seal ring 401 are both provided with inclined chamfers.

[0026] A line sealing ring 601 is also provided between the intermediate seat 3 and the line 6 .

[0027] The intermediate seat 3 is provided with a step portion 301, and the line sealing ring 601 is an L-shaped structure. The bottom of the line sealing ring 601 is supported by the step portion 301. A gap is left between the line sealing ring 601 and the intermediate seat 3, and a locking ring 602 is provided in the gap.

[0028] The lower part of the locking ring 602 is inserted between the line sealing ring 601 and the intermediate seat 3. The upper part of the locking ring 602 is provided with an annular support plate 603, and the support plate 603 corresponds to the top of the intermediate seat 3; the support plate 603 is provided with evenly distributed locking teeth 604, and the locking teeth 604 are distributed in a ring shape around the line sealing ring 601 on the support plate 603, and the top of the locking teeth 604 is flush with the top of the line sealing ring 601; the bottom of the boss 101 is provided with an inclined slope, and the intermediate seat 3 supports the support plate 603 and the locking ring 602 upward so that the locking teeth 604 are close to the center to press the line sealing ring 601 to achieve locking and sealing of the line 6.

[0029] Furthermore, the locking teeth 604 are of a sheet-like structure, and are arranged on the support plate 603 to be tilted to one side as a whole; when the locking ring 604 moves upward as a whole, under the limitation of the slope, the locking teeth 604 are stacked layer by layer to press the outer edge of the line sealing ring 601.

[0030] When the device is in use, the bellows and the sensor are respectively installed above and below the connecting seat, the spiral head on the mounting ring is screwed into the end of the bellows, and then the bellows and the mounting ring are inserted together to the top of the connecting seat, and the bellows sealing ring is inserted between the connecting seat and the bellows, and then the end cap is screwed in, and the bellows sealing ring is pressed downward to make the sealing ring fill, seal and connect between the mounting ring and the bellows and between the connecting seat and the bellows.

[0031] Then pass the line through the corrugated tube, and then pass through the line sealing ring, locking ring and intermediate seat and connect with the sensor. Screw the intermediate seat to the bottom of the connecting seat. As the intermediate seat rises, its top pushes up the locking ring, so that the locking teeth tilt toward the center under the limit of the slope inside the connecting seat and press the line sealing ring. The line sealing ring fits to the surface of the line. As the intermediate seat continues to be screwed in, the line sealing ring also locks the line. Then install the sensor at the bottom of the intermediate seat.

[0032] The locking teeth are arranged as an inclined sheet structure, which will overlap and surround the outside of the line sealing ring when they are gathered inwards, so as to achieve a better surrounding and tightening effect on the line sealing ring.

Claims

1. A circuit protection layer connection structure for a submersible liquid level transmitter, characterized in that: It includes a connecting seat, an end cap arranged on the upper part of the connecting seat, and an intermediate seat arranged on the lower part of the connecting seat; the connecting seat as a whole is a tubular structure penetrating from top to bottom, and an annular boss is arranged at the inner center of the connecting seat; the bellows is inserted into the connecting seat above the boss, and a bellows sealing ring is arranged between the bellows and the connecting seat, the end cap is an annular structure, and the end cap presses the bellows sealing ring so that it fills the space between the bellows and the connecting seat; an internal thread is arranged on the inner wall of the connecting seat under the boss, the upper part of the intermediate seat is connected to the connecting seat under the boss, and the lower part of the intermediate seat is connected to the sensor; the intermediate seat is also a hollow structure, and the line passes through the bellows, passes through the connecting seat and the intermediate seat and is connected to the sensor.

2. The circuit protection layer connection structure of a submersible liquid level transmitter according to claim 1 is characterized in that: A mounting ring is also provided at the bottom of the bellows, the outer portion of the mounting ring matches the inner wall of the connecting portion, a spiral head extending upward is provided at the center of the mounting ring, and the spiral head is screwed into the bellows; the bellows sealing ring supports the mounting ring.

3. The circuit protection layer connection structure of a submersible liquid level transmitter according to claim 2 is characterized in that: The end face of the mounting ring is a U-shaped structure, and the bellows sealing ring is a stepped structure; the bellows is screwed into the mounting ring, the lower half of the bellows sealing ring is inserted between the bellows and the mounting ring, and the upper half of the bellows sealing ring corresponds to between the bellows and the inner wall of the connecting seat.

4. The circuit protection layer connection structure of a submersible liquid level transmitter according to claim 3 is characterized in that: The top and bottom of the bellows sealing ring are both provided with inclined chamfers.

5. The circuit protection layer connection structure of a submersible liquid level transmitter according to claim 4 is characterized in that: A circuit sealing ring is also provided between the intermediate seat and the circuit.

6. The circuit protection layer connection structure of a submersible liquid level transmitter according to claim 5, characterized in that: A step portion is provided in the middle seat, the line sealing ring is an L-shaped structure, the bottom of the line sealing ring is supported to the step portion, a gap is left between the line sealing ring and the middle seat, and a locking ring is provided in the gap.

7. The circuit protection layer connection structure of a submersible liquid level transmitter according to claim 6 is characterized in that: The lower part of the locking ring is inserted between the line sealing ring and the middle seat, and an annular support plate is provided on the upper part of the locking ring, and the support plate corresponds to the top of the middle seat; the support plate is provided with evenly distributed locking teeth, and the locking teeth are distributed in a ring shape around the line sealing ring on the support plate, and the top of the locking teeth is flush with the top of the line sealing ring; the bottom of the boss is provided with an inclined slope, and the middle seat supports the support plate and the locking ring upward so that the locking teeth are close to the center to press the line sealing ring to achieve locking and sealing of the line.

8. The circuit protection layer connection structure of a submersible liquid level transmitter according to claim 7, characterized in that: The locking teeth are of sheet-like structure and are arranged on the support plate to one side as a whole; when the locking ring moves upward as a whole, under the limitation of the slope, the locking teeth are stacked layer by layer to press the outer edge of the line sealing ring.

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