Side flange connection structure of PP-lined magnetic level gauge

Abstract

The utility model discloses a side flange connection structure of a PP-lined magnetic level gauge, comprising a measuring cylinder assembly and a level gauge display panel, wherein the level gauge display panel is arranged at the front side of the measuring cylinder assembly, the measuring cylinder assembly comprises a steel pipe, a head, a bottom flange, a side guide pipe and a side flange, the head is fixedly connected to the top end of the steel pipe, the bottom flange is fixedly sleeved on the outer side of the bottom end of the steel pipe, and the side guide pipe is symmetrically arranged on the rear side of the steel pipe, thereby increasing the welding strength and leaving a larger space for the weld between the PP guide pipe and the PP main pipe, so that the number of weld passes is changed from the original single pass to 2 passes, thereby ensuring the close fit of the two welding rings, so that the position force of the PP guide pipe can be transmitted to the outer steel guide pipe, thereby reducing the risk of cracking of the PP guide pipe, changing the connection mode between the PP guide pipe and the welding ring, eliminating the influence of welding on the sealing surface, improving the product appearance, avoiding the risk of cracks caused by grinding the sealing surface after welding, and improving the sealing reliability.

Description

Technical Field

[0001] The utility model relates to the technical field of magnetic level gauges, in particular to a side flange connection structure of a PP-lined magnetic level gauge. Background Art

[0002] When selecting a magnetic level gauge, for hydrochloric acid with a concentration lower than 33%, or when the medium contains weakly acidic corrosive components and the temperature and pressure are not high, we may recommend to users the use of a stainless steel lined PP (polypropylene) type magnetic level gauge, which has the characteristics of light structure and low cost compared to PTFE (polytetrafluoroethylene) lined or precious metal type products;

[0003] The existing technology has the following defects: the root diameter of the stainless steel lead pipe is small, so the opening of the main pipe is small, resulting in only one layer of weld bead being applied to the weld between the PP lead pipe and the main pipe, and the weld strength is low; when the outer diameter of the flange is large, the lead pipe needs to be lengthened to allow the welding gun to reach the root position of the weld between the lead pipe and the main pipe, otherwise the weld may not be fused; during use, when the liquid level is high, the weight of the product plus the weight of the liquid in the measuring cylinder of the liquid level gauge may cause the weld of the lower lead pipe to be stressed, and cracks may occur after a long time;

[0004] After welding is completed, a water pressure test will be carried out, but it is impossible to completely detect fine cracks. Once cracks appear during use, the medium will penetrate into the interlayer between the PP pipe and the stainless steel pipe, corrode the outer stainless steel pipe, and then leak into the external environment, causing pollution or chemical damage.

[0005] Currently, no effective solution has been proposed for the problems in the related technologies. Utility Model Content

[0006] In view of the problems in the related technology, the utility model proposes a side flange connection structure of a PP-lined magnetic level gauge to overcome the above-mentioned technical problems existing in the existing related technology.

[0007] To this end, the specific technical solutions adopted by the utility model are as follows:

[0008] The side flange connection structure of the lined PP type magnetic level gauge includes a measuring cylinder assembly and a liquid level gauge display panel. The liquid level gauge display panel is arranged on the front side of the measuring cylinder assembly. The measuring cylinder assembly includes a steel pipe, a head, a bottom flange, a side guide pipe, and a side flange. The head is fixedly connected to the top end of the steel pipe, the bottom flange is fixedly sleeved on the outside of the bottom end of the steel pipe, the side guide pipe is symmetrically arranged on the rear side of the steel pipe, and the side flanges are respectively sleeved on the rear ends of the side guide pipes. A clamp is provided on the outside of the liquid level gauge display panel, and is connected to the outside of the steel pipe through the clamp. The bottom end of the steel pipe is connected to a drain valve.

[0009] Preferably, bolts are respectively connected to the top end and the bottom flange of the drain valve, and a flat gasket is fitted between the input end of the drain valve and the bottom flange.

[0010] Preferably, the steel pipe comprises a steel main pipe and a PP main pipe, and the steel main pipe is sleeved and fixed on the outer wall of the PP main pipe.

[0011] Preferably, the side flange comprises a PP welding ring and a steel welding ring, the PP welding ring is embedded and connected to the outside of the steel welding ring, and the side guide pipe comprises a PP guide pipe and a steel guide pipe, and the steel guide pipe is sleeved on the outside of the PP guide pipe.

[0012] Preferably, the outer walls of the rear ends of the PP lead pipe and the steel lead pipe are respectively provided with thread grooves, and the PP lead pipe and the steel lead pipe are respectively threadedly sleeved with the inner holes of the PP welding ring and the steel welding ring through the thread grooves, and the rear end of the PP lead pipe is fixedly connected with the PP main pipe.

[0013] Preferably, a loose flange is sleeved on the outer wall of the rear end of the steel guide pipe, the rear end of the steel guide pipe is sleeved and fixed on the inner hole of the steel welding ring, and the front end of the steel guide pipe is fixedly connected to the outer wall of the steel main pipe, and a limiting ring is sleeved between the inner hole of the loose flange and the outer wall of the steel guide pipe.

[0014] The beneficial effects of the utility model are as follows: the pressure-bearing and sealing properties of the sewage valve and the measuring tube assembly after connection can be ensured, the steel main pipe can be matched well, the welding strength can be increased, and a larger space can be reserved for the weld between the PP lead pipe and the PP main pipe, so that the number of welds is changed from the original single pass to 2 passes, thereby increasing the weld strength between the PP lead pipe and the PP main pipe. The PP welding ring and the steel welding ring adopt a concave-convex surface connection method, thereby ensuring that the two welding rings fit tightly, so that the position force of the PP lead pipe can be transmitted to the outer steel lead pipe, thereby reducing the risk of cracking of the PP lead pipe, thereby changing the connection method between the PP lead pipe and the welding ring, thereby eliminating the influence of welding on the sealing surface, thereby improving the product appearance, thereby avoiding the risk of cracks caused by grinding the sealing surface after welding, and thereby improving the sealing reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the overall structure of the side flange connection structure of the lined PP type magnetic level gauge according to an embodiment of the utility model;

[0017] Figure 2It is a side structural cross-sectional schematic diagram of the side flange connection structure of the lined PP type magnetic level gauge according to an embodiment of the utility model;

[0018] Figure 3 The utility model is a schematic diagram of the cross-sectional structure of the side guide pipe and the side flange of the side flange connection structure of the lined PP type magnetic level gauge according to the embodiment of the utility model.

[0019] In the figure:

[0020] 1. Measuring cylinder assembly; 2. Liquid level gauge display board; 3. Steel pipe; 4. End cap; 5. Bottom flange; 6. Side guide pipe; 7. Side flange; 8. Clamp; 9. Drain valve; 10. Bolt; 11. Flat washer; 12. Steel main pipe; 13. PP main pipe; 14. PP welding ring; 15. Steel welding ring; 16. PP guide pipe; 17. Steel guide pipe; 18. Threaded groove; 19. Loose flange; 20. Limit ring. DETAILED DESCRIPTION

[0021] To further illustrate each embodiment, the present invention provides drawings, which are part of the disclosure of the present invention and are mainly used to illustrate the embodiments. They can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, ordinary technicians in the field should be able to understand other possible implementation methods and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0022] According to an embodiment of the utility model, a side flange connection structure of a PP-lined magnetic level gauge is provided. Example

[0023] like Figure 1-3 As shown, the side flange connection structure of the lined PP type magnetic level gauge according to the embodiment of the utility model includes a measuring cylinder assembly 1 and a level gauge display panel 2. The level gauge display panel 2 is arranged on the front side of the measuring cylinder assembly 1. The measuring cylinder assembly 1 includes a steel pipe 3, a head 4, a bottom flange 5, a side guide pipe 6, and a side flange 7. The head 4 is fixedly connected to the top of the steel pipe 3, the bottom flange 5 is fixedly sleeved on the outside of the bottom end of the steel pipe 3, the side guide pipe 6 is symmetrically arranged on the rear side of the steel pipe 3, and the side flanges 7 are respectively sleeved on the rear ends of the side guide pipes 6 A clamp 8 is provided on the outside of the liquid level gauge display panel 2, and is connected to the outside of the steel pipe 3 through the clamp 8. A drain valve 9 is connected to the bottom end of the steel pipe 3. Bolts 10 are respectively connected to the top of the drain valve 9 and the bottom flange 5. A flat gasket 11 is fitted between the input end of the drain valve 9 and the bottom flange 5. The input end of the drain valve 9 is connected and fixed to the bottom flange 5 by bolts 10, and a flat gasket 11 is fitted between the input end of the drain valve 9 and the bottom flange 5, which can ensure the pressure bearing and sealing performance of the drain valve 9 after being connected to the measuring cylinder assembly 1. Example

[0024] like Figure 1-3As shown, according to the side flange connection structure of the lined PP type magnetic level gauge of the embodiment of the utility model, it includes a measuring cylinder assembly 1 and a liquid level gauge display board 2. The liquid level gauge display board 2 is arranged on the front side of the measuring cylinder assembly 1. The measuring cylinder assembly 1 includes a steel pipe 3, a head 4, a bottom flange 5, a side guide pipe 6, and a side flange 7. The head 4 is fixedly connected to the top of the steel pipe 3, the bottom flange 5 is fixedly sleeved on the outside of the bottom end of the steel pipe 3, the side guide pipe 6 is symmetrically arranged on the rear side of the steel pipe 3, and the side flanges 7 are respectively sleeved on the rear ends of the side guide pipes 6. A clamp 8 is provided on the outside of the liquid level gauge display board 2, and is connected to the outside of the steel pipe 3 through the clamp 8. A drain valve 9 is connected to the bottom end of the steel pipe 3. The steel pipe 3 includes a steel main pipe 12 and a PP main pipe 13. The steel main pipe 12 is sleeved and fixed on the outer wall of the PP main pipe 13. The side flange 7 includes a PP welding ring 14 and a steel welding ring 15. The PP welding ring 14 is embedded and connected to the outside of the steel welding ring 15. The side guide pipe 6 includes a PP guide pipe 16, a steel guide pipe 1 7. The steel lead pipe 17 is sleeved on the outside of the PP lead pipe 16. The outer walls of the rear ends of the PP lead pipe 16 and the steel lead pipe 17 are respectively provided with a thread groove 18. The PP lead pipe 16 and the steel lead pipe 17 are respectively threadedly sleeved with the inner holes of the PP welding ring 14 and the steel welding ring 15 through the thread groove 18, and the rear end of the PP lead pipe 16 is connected and fixedly connected with the PP main pipe 13. The outer wall of the rear end of the steel lead pipe 17 is sleeved with a loose flange 19. The rear end of the steel lead pipe 17 is sleeved and fixed on the inner hole of the steel welding ring 15, and the front end of the steel lead pipe 17 is fixedly connected with the outer wall of the steel main pipe 12. A limiting ring 20 is sleeved between the inner hole of the loose flange 19 and the outer wall of the steel lead pipe 17. The rear end of the steel lead pipe 17 is fixedly welded with the steel main pipe 12. The PP lead pipe 16 penetrates the steel lead pipe 17 and the steel main pipe 12, and then is connected and fixedly connected with the PP main pipe 13, so that the diameter of the position where the steel lead pipe 17 is connected to the steel main pipe 12 is expanded, so that it can fit the steel main pipe 12 and increase the welding strength.On the other hand, a larger space is reserved for the weld between the PP lead pipe 16 and the PP main pipe 13, so that the number of welds is changed from the original single pass to two passes, thereby increasing the weld strength between the PP lead pipe 16 and the PP main pipe 13. The PP welding ring 14 and the steel welding ring 15 are connected in a concave-convex surface manner, thereby ensuring that the two welding rings fit tightly, so that the position force of the PP lead pipe 16 can be transmitted to the outer steel lead pipe 17, thereby reducing the risk of cracking of the PP lead pipe 16. The PP lead pipe 16 is threadedly sleeved with the inner hole of the PP welding ring 14 through the thread groove 18, and then the PP welding ring 14 is welded and fixed to the PP lead pipe 16 at the back, thereby changing the connection between the PP lead pipe 16 and the steel welding ring 15. The connection mode of the welding ring eliminates the influence of welding on the sealing surface and improves the appearance of the product. On the other hand, it avoids the risk of cracks caused by grinding the sealing surface after welding and improves the sealing reliability. The limit ring 20 is arranged between the inner hole of the loose flange 19 and the outer wall of the steel lead pipe 17, which can block the loose flange 19 from shaking back and forth. The steel lead pipe 17 and the steel welding ring 15 are threadedly connected through the thread groove 18. When welding the weld seam of the PP lead pipe 16 and the back of the PP welding ring 14, the steel welding ring 15 and the side flange 7 can be pushed to the root, and then screwed out after welding, and spot welded and positioned after being tightly attached to the PP welding ring, which can effectively prevent loosening. ;

[0025] In summary, with the aid of the above technical solution of the utility model, when the device is in use, the input end of the drain valve 9 is connected and fixed to the bottom flange 5 by the bolt 10, the rear end of the steel lead pipe 17 is welded and fixed to the steel main pipe 12, the PP lead pipe 16 penetrates the steel lead pipe 17 and the steel main pipe 12, and then is connected and fixed to the PP main pipe 13, so that the position where the steel lead pipe 17 is connected to the steel main pipe 12 is enlarged, the PP welding ring 14 and the steel welding ring 15 are connected in a concave and convex manner, and the PP lead pipe 16 is connected to the PP main pipe 13 by the thread groove 18. The inner hole of the welding ring 14 is threadedly sleeved, and then the back of the PP welding ring 14 is welded and fixed to the PP lead pipe 16. The limiting ring 20 is arranged between the inner hole of the loose flange 19 and the outer wall of the steel lead pipe 17, which can block the loose flange 19 from shaking back and forth. The steel lead pipe 17 and the steel welding ring 15 are threadedly connected through the thread groove 18. When welding the weld between the PP lead pipe 16 and the back of the PP welding ring 14, the steel welding ring 15 and the side flange 7 can be pushed to the root, and then screwed out after welding, and spot welded to the PP welding ring after being tightly attached.

[0026] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A side flange connection structure of a PP-lined magnetic level gauge, comprising a measuring cylinder assembly (1) and a level gauge display panel (2), characterized in that: The liquid level gauge display panel (2) is arranged on the front side of the measuring tube assembly (1). The measuring tube assembly (1) comprises a steel pipe (3), a sealing head (4), a bottom flange (5), a side guide pipe (6), and a side flange (7). The sealing head (4) is fixedly connected to the top end of the steel pipe (3). The bottom flange (5) is fixedly sleeved on the outside of the bottom end of the steel pipe (3). The side guide pipe (6) is symmetrically arranged on the rear side of the steel pipe (3). The side flanges (7) are sleeved on the rear ends of the side guide pipes (6). A clamp (8) is provided on the outside of the liquid level gauge display panel (2) and is connected to the outside of the steel pipe (3) via the clamp (8). The bottom end of the steel pipe (3) is connected to a drain valve (9).

2. The side flange connection structure of the lined PP type magnetic level gauge according to claim 1 is characterized in that: Bolts (10) are respectively connected to the top end of the drain valve (9) and the bottom flange (5), and a flat gasket (11) is fitted between the input end of the drain valve (9) and the bottom flange (5).

3. The side flange connection structure of the lined PP type magnetic level gauge according to claim 2 is characterized in that: The steel pipe (3) comprises a steel main pipe (12) and a PP main pipe (13); the steel main pipe (12) is sleeved and fixed on the outer wall of the PP main pipe (13).

4. The side flange connection structure of the PP-lined magnetic level gauge according to claim 3 is characterized in that: The side flange (7) comprises a PP welding ring (14) and a steel welding ring (15); the PP welding ring (14) is embedded and connected to the outside of the steel welding ring (15); the side guide pipe (6) comprises a PP guide pipe (16) and a steel guide pipe (17); the steel guide pipe (17) is sleeved on the outside of the PP guide pipe (16).

5. The side flange connection structure of the PP-lined magnetic level gauge according to claim 4 is characterized in that: The rear end outer walls of the PP guide pipe (16) and the steel guide pipe (17) are respectively provided with a thread groove (18); the PP guide pipe (16) and the steel guide pipe (17) are respectively threadedly sleeved with the inner holes of the PP welding ring (14) and the steel welding ring (15) through the thread groove (18); and the rear end of the PP guide pipe (16) is connected to the PP main pipe (13) through a through-hole and fixed connection.

6. The side flange connection structure of the lined PP type magnetic level gauge according to claim 5 is characterized in that: The outer wall of the rear end of the steel guide pipe (17) is sleeved with a loose flange (19), the rear end of the steel guide pipe (17) is sleeved and fixed in the inner hole of the steel welding ring (15), and the front end of the steel guide pipe (17) is fixedly connected to the outer wall of the steel main pipe (12), and a limiting ring (20) is sleeved between the inner hole of the loose flange (19) and the outer wall of the steel guide pipe (17).

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