Plug-in type liquid level meter diaphragm welding seam protection device

Abstract

The invention relates to the technical field of engineering, in particular to a plug-in type liquid level meter diaphragm welding seam protection device which comprises a liquid level meter and further comprises a plug-in cylinder, one end of the plug-in cylinder is communicated with the liquid level meter, and the other end of the plug-in cylinder is provided with a connecting part. And the protection unit is arranged on the outer side of the connecting part in a sleeving manner, and the protection unit is welded to the connecting part, so that the interior of the protection unit and the insertion cylinder form a closed cavity, and the effect of protecting the connecting part is achieved. Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects that the material cost is low; the welding difficulty and the welding reliability of dissimilar materials are reduced; the thickness of the anti-corrosion structure is increased by more than 10 times; the service life of a diaphragm welding seam is effectively prolonged; the production process is low in difficulty and basically has no influence on the measurement precision of the liquid level meter; the method is suitable for welding seam protection of thin materials and thick materials.

Description

Technical Field

[0001] The invention relates to the field of engineering technology, and in particular to a diaphragm weld protection device for an insertion type liquid level gauge. Background Art

[0002] In order to extend the service life of the heterogeneous material insertion level gauge; the existing method adopts the method of welding the pressure ring and the diaphragm together, wherein the material of the pressure ring is the same as the barrel of the insertion tube, and the diaphragm is a special material metal with higher cost; it is difficult to determine the specific composition of the weld after the two materials are melted, and the corrosion resistance is generally between the two materials; since the diaphragm itself is relatively thin at about 0.08mm, the welding power / current cannot be too high, and the thickness of the anti-corrosion weld is about 0.15mm, so the existing technology cannot well achieve the protection of the weld. Summary of the invention

[0003] The purpose of the present invention is to solve the deficiencies of the prior art and provide a protective device with low material cost, which can effectively delay the corrosion of the diaphragm weld caused by the medium, thereby increasing the overall service life of the insertion type liquid level meter.

[0004] To achieve the above object, the present invention provides an insertion type liquid level gauge diaphragm weld protection device, comprising a liquid level gauge, and also comprising

[0005] An insertion tube, one end of which is connected to the liquid level meter, and the other end of which is provided with a connecting portion;

[0006] The protection unit is sleeved on the outside of the connecting portion, and the protection unit is welded to the connecting portion, so that the interior of the protection unit and the insertion tube form a closed cavity, thereby protecting the connecting portion.

[0007] Preferably, the connecting portion is in the shape of a boss, and a first groove is formed on the surface of the boss.

[0008] Preferably, the protection unit comprises a first protection unit and a second protection unit, and the first protection unit and the second protection unit are both fitted with the connecting portion to form a sealed cavity.

[0009] Preferably: the first protection unit includes a base, which is a flat cylindrical structure with a hole, one end of the base is embedded in the first groove, that is, one end of the base is nested in the first groove, a second groove is opened in the middle of the outer circle of the base surface, and a sealing ring is installed on the surface of the second groove.

[0010] Preferably, the other end of the base is a corrugated surface, an isolation diaphragm is attached to the surface of the corrugated surface, and the isolation diaphragm is welded to the base.

[0011] Preferably, the second protection unit comprises a protection pressure ring, which is sleeved on the outside of the first protection unit and cooperates with the first protection unit through the sealing ring.

[0012] Preferably, the second protection unit further comprises a sealing gasket, which is arranged on an outer end surface of the isolation diaphragm away from the liquid level gauge, and the sealing gasket is located inside the protection pressure ring.

[0013] Preferably, the protective pressure ring extends toward one side of the connecting portion, and the protective pressure ring fits with the boss of the connecting portion, and then the protective pressure ring and the connecting portion are welded after fitting to form a sealed cavity.

[0014] Compared with the prior art, the technical solution proposed in this application has the following beneficial effects:

[0015] 1) Low material cost;

[0016] 2) Reduce the difficulty and reliability of welding of dissimilar materials;

[0017] 3) The thickness of the anti-corrosion structure is increased by more than 10 times;

[0018] 4) Effectively extend the service life of the diaphragm weld;

[0019] 5) The production process is relatively easy and has little impact on the measurement accuracy of the liquid level meter;

[0020] 6) Suitable for weld protection of thin and thick materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0022] Figure 1 This is a structural diagram of the diaphragm weld protection device of the insertion type liquid level gauge of the present invention;

[0023] Figure 2 It is an application process diagram of the present invention;

[0024] In the figure: 1. Protective pressure ring, 2. Sealing gasket, 3. Isolation diaphragm, 4. Base, 5. Sealing ring, 6. Sealing groove, 7. Insert cylinder, 8. Connecting part, 9. Liquid level meter. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe and discuss the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings of the present invention. Obviously, what is described here is only a part of the examples of the present invention, not all the examples. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0026] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a component centered. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a component centered. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a component centered. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0028] See also Figure 1 The present embodiment provides an insertion type liquid level gauge diaphragm weld protection device, including a liquid level gauge, and also includes: an insertion tube, one end of the insertion tube is connected to the liquid level gauge, and the other end of the insertion tube is provided with a connecting portion; a protection unit, the protection unit is sleeved on the outside of the connecting portion, and the protection unit is welded to the connecting portion, so that the interior of the protection unit and the insertion tube form a closed cavity, thereby achieving the effect of protecting the connecting portion.

[0029] The connecting portion is in the shape of a boss, and a first groove is provided on the surface of the boss. The protection unit includes a first protection unit and a second protection unit, and the first protection unit and the second protection unit are both fitted with the connecting portion to form a sealed cavity. The first protection unit includes a base, which is a flat cylindrical structure with holes, and one end of the base is embedded in the first groove. The first groove is marked in the figure, that is, one end of the base is embedded in the first groove, and a second groove is provided in the middle of the outer circle of the surface of the base. In this embodiment, the second groove is a sealing groove, and a sealing ring is installed on the surface of the second groove. The other end of the base is a corrugated surface, and an isolation diaphragm is attached to the surface of the corrugated surface, and the isolation diaphragm is welded to the base. The second protection unit includes a protective pressure ring, which is sleeved on the outside of the first protection unit and cooperates with the first protection unit through a sealing ring. The second protection unit also includes a sealing gasket, which is arranged on the outer end face of the isolation diaphragm away from the liquid level gauge, and the sealing gasket is located inside the protective pressure ring. The protective pressure ring extends to one side of the connecting part, and the protective pressure ring is fitted with the boss of the connecting part, and then the protective pressure ring and the connecting part are welded after fitting to form a sealed cavity.

[0030] It should be noted that: the protective pressure ring is a hollow annular cover structure, which can cover the base and can be inserted into the boss on the left side of the insertion tube body; the sealing gasket is a circular thin film structure, and the material is polytetrafluoroethylene or fluororubber; the isolation diaphragm is a circular corrugated thin film structure, which can basically coincide with the corrugated surface on the left side of the base; the base is a flat cylindrical structure with holes, which can be partially embedded in the groove on the left side of the insertion tube, and can be completely covered by the protective pressure ring, with an annular groove in the middle of the outer circle; the sealing ring is a circular ring structure, and the material is fluororubber; the insertion tube body is a circular tubular structure, and the left side is processed with a boss that fits with the protective pressure ring and a groove that fits with the base, and the overall length can be processed as needed.

[0031] See also Figure 2 The protective device assembly process provided in this embodiment is as follows:

[0032] a. Stick the isolation diaphragm to the corrugated surface on the left side of the base, and weld the outer edge formed by the two (using argon arc welding) to form a circular weld with a thickness of about 0.15mm (the weld to be protected);

[0033] b. Insert the right side boss of the base with the isolation diaphragm into the left side groove of the insertion tube, and weld the outer edge formed by the two parts (using argon arc welding) in a circle to form a circular weld (protected weld) with a thickness of about 1.5 mm;

[0034] c. Install the sealing ring into the groove (sealing groove) of the outer circle of the base, and cooperate with the protective pressure ring as the second anti-corrosion measure after the anti-corrosion weld fails;

[0035] d. Place the sealing gasket on the surface of the assembled isolation diaphragm, flush with the outer edge weld, and cooperate with the protective pressure ring as the leftmost anti-corrosion protection measure;

[0036] e. Put the protective pressure ring onto the boss on the left side of the insert cylinder body after the above steps, and after it fits with the bottom of the boss, weld the outer edge formed by the two (using argon arc welding) in a circle. After welding, a circular weld with a thickness of about 1.5mm is formed as an anti-corrosion protection measure on the far right.

[0037] The protective device of this embodiment forms a closed cavity to protect the thin weld, thereby achieving the weld protection effect; a thin weld outer protective shell is formed to achieve the effect of delaying corrosion; and the base can be replaced with a common material that is more reliable for welding with other components, while reducing material costs and reducing the difficulty of producing heterogeneous material insertion tubes; a thicker anti-corrosion layer is added outside the diaphragm weld, which effectively delays the possible corrosion of the diaphragm weld by the medium, thereby increasing the overall service life of the insertion level meter.

[0038] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and one or more of the above embodiments are combined into one embodiment. Those skilled in the art can make various changes or modifications or combinations within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other at will.

Claims

1. An insertion type liquid level gauge diaphragm weld protection device, comprising a liquid level gauge, characterized in that: Also includes An insertion tube, one end of which is connected to the liquid level meter, and the other end of which is provided with a connecting portion; The protection unit is sleeved on the outside of the connecting portion, and the protection unit is welded to the connecting portion, so that the interior of the protection unit and the insertion tube form a closed cavity, thereby protecting the connecting portion.

2. The insertion type liquid level gauge diaphragm weld protection device according to claim 1, characterized in that: The connecting portion is in a boss shape, and a first groove is formed on the surface of the boss.

3. The insertion type liquid level gauge diaphragm weld protection device according to claim 2, characterized in that: The protection unit includes a first protection unit and a second protection unit, and the first protection unit and the second protection unit are both fitted with the connecting portion to form a sealed cavity.

4. The insertion type liquid level gauge diaphragm weld protection device according to claim 3, characterized in that: The first protection unit includes a base, which is a flat cylindrical structure with a hole. One end of the base is embedded in the first groove, that is, one end of the base is nested in the first groove. A second groove is opened in the middle of the outer circle of the base surface, and a sealing ring is installed on the surface of the second groove.

5. The insertion type liquid level gauge diaphragm weld protection device according to claim 4, characterized in that: The other end of the base is a corrugated surface, an isolation diaphragm is attached to the surface of the corrugated surface, and the isolation diaphragm is welded to the base.

6. The insertion type liquid level gauge diaphragm weld protection device according to claim 5, characterized in that: The second protection unit includes a protection pressure ring, which is sleeved on the outside of the first protection unit and cooperates with the first protection unit through the sealing ring.

7. The insertion type liquid level gauge diaphragm weld protection device according to claim 6, characterized in that: The second protection unit further comprises a sealing gasket, which is arranged on an outer end surface of the isolation diaphragm away from the liquid level gauge, and the sealing gasket is located inside the protection pressure ring.

8. The insertion type liquid level gauge diaphragm weld protection device according to claim 7, characterized in that: The protective pressure ring extends toward one side of the connecting portion, and the protective pressure ring is fitted with the boss of the connecting portion. After fitting, the protective pressure ring and the connecting portion are welded to form a sealed cavity.

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