CN214489246U - Electronic reciprocal pump body water tank crack welding set of wheel dephosphorization - Google Patents

Abstract

The utility model discloses an electronic reciprocal pump body water tank crackle welding set of wheel dephosphorization, it includes the base, can dismantle the fixed steel sheet of back connection that sets up in base upper surface rear side, can dismantle respectively that the interval sets up two bevel face fixed arm-tie in base upper surface front side and can dismantle respectively with fixed steel sheet of back connection and two bevel face fixed arm-tie and be connected fixed top board. The utility model also provides a repair technology of the electronic reciprocal pump body water tank crackle welding set of wheel dephosphorization, to the problem that exists in the background art, the utility model provides a repair technology of the electronic reciprocal pump body water tank crackle welding set of wheel dephosphorization. Use the utility model discloses can implement fast and accomplish electronic reciprocal cast iron pump body water tank crack welding restoration, reduce purchase and maintenance cost, reduce the loss of shutting down for a long time, provide the guarantee for the various domestic and foreign wheels of reasonable group's steel rolling production.

Description

Electronic reciprocal pump body water tank crack welding set of wheel dephosphorization

Technical Field

The utility model belongs to the technical field of the welding, a repair technology of electronic reciprocal pump body water tank crackle welding set of wheel dephosphorization is related to.

Background

The dephosphorization of wheel blanks after rolling and heating in a wheel production line of a horse steel rail transit material science and technology limited company generally uses a 32MPa horizontal plunger electric reciprocating pump, the quality of the dephosphorization effect directly influences the rolling quality of wheel products, the working principle is that a motor is connected with an input shaft of a speed reducer through a coupler, an output shaft of the speed reducer drives a crankshaft to rotate, a connecting rod, a crosshead and a plunger are driven to rotate to drive the connecting rod, the crosshead and the plunger to do reciprocating motion, the plunger is sealed by a filler, and the purpose of sucking and discharging high-pressure water is achieved under the matching of a suction valve and a discharge valve. The water tank of the pump body of the horizontal plunger electric reciprocating pump is used for taking away heat of high-temperature lubricating oil in the pump body so as to prevent the lubricating oil from being ultrahigh in temperature in the working process. After some horizontal plunger electric reciprocating pumps are used for a long time, irregular penetrating cracks with different lengths (such as 1M length) can appear in a water tank of a pump body, cooling water for cooling lubricating oil flows away along the cracks and cannot cool the lubricating oil, the lubricating oil cannot be cooled in time, heat generated between friction pairs of moving parts cannot be taken away by the lubricating oil at all in the operation process of the pump, meanwhile, the lubricating oil is deteriorated due to high oil temperature, the lubricating effect is influenced, and abrasion between the motion pairs is increased. If the horizontal plunger electric reciprocating pump continues to operate without replacement or repair, the whole horizontal plunger electric reciprocating pump can be quickly damaged during movement, and even the pump cannot be continuously used due to thermal deformation between matching surfaces of pump bodies. However, if the pump is replaced with a new one, not only the purchase cycle is long, but also the purchase cost of the 32MPa horizontal plunger electric reciprocating pump is high, which will affect the production. In order to restore production as soon as possible, the pump body water tank cracks need to be repaired.

SUMMERY OF THE UTILITY MODEL

To the problem that exists in the background art, the utility model provides an electronic reciprocal pump body water tank crack welding set's of wheel dephosphorization repair process can implement fast after using and accomplish electronic reciprocal cast iron pump body water tank crack welding and repair, reduces purchase and maintenance cost, reduces the long-time loss of shutting down, provides the guarantee for the various domestic and foreign wheels of reasonable group's steel rolling production.

The utility model provides a technical problem's technical scheme as follows:

the utility model relates to an electronic reciprocal pump body water tank crackle welding set of wheel dephosphorization, it includes the base, can dismantle the fixed steel sheet of back connection that sets up in base upper surface rear side perpendicularly, can dismantle the interval setting perpendicularly respectively at two bevel face fixed arm-tie of base upper surface front side and can dismantle perpendicularly respectively with fixed steel sheet of back connection and two bevel face fixed arm-tie and be connected fixed top board.

Further, the base comprises a bottom plate and a plurality of supporting legs arranged at the bottom of the bottom plate.

Furthermore, the upper pressing plate and the back surface are fixedly connected with the upper ends of the fixed steel plates and the two bevel face fixed pull plates, and the bottom plate and the back surface are fixedly connected with the lower ends of the fixed steel plates and the two bevel face fixed pull plates through bolts.

Furthermore, a plurality of triangular fixing plates are welded between the supporting legs and the bottom plate.

Furthermore, the bottom plate is also provided with a pump body supporting leg

Furthermore, the upper pressure plate and the bottom plate are provided with limit holes and/or limit grooves.

The utility model provides a technical problem's another technical scheme as follows:

based on above-mentioned technical scheme repair technology of electronic reciprocal pump body water tank crackle welding set of wheel dephosphorization for the welding repair of electronic reciprocal pump body water tank crackle, set up V type groove along electronic reciprocal pump body water tank crackle earlier, then erect the base, place the electronic reciprocal pump body at the base, and install back connection fixed steel sheet and two fixed arm-tie of bevel face respectively in the front and back side of base, ensure to treat to weld prosthetic water tank crackle and be located between the fixed arm-tie of two bevel face, install the top board at last and implement the welding after fixing the electronic reciprocal pump body, the step is as follows:

step one, preparing before welding;

1.1), welding equipment: the HT400D digital control inversion type manual direct current welding machine is characterized in that a Z308 welding rod is adopted as a welding material, and the welding rod is baked for 2 hours at the temperature of 200-250 ℃ and then is kept at a constant temperature and taken at any time;

1.2), welding position: vertical welding;

1.3), cleaning before welding: removing water and oil inside and outside the groove by using oxyacetylene flame, and then polishing and derusting by using a sand cloth or a grinding wheel machine;

1.4), welding requirements: the welding technology of single-side welding and double-side forming fuses the base material of the overlaying layer, thereby preventing white spots and hardening structures.

1.5), weldment material: casting iron;

1.6), auxiliary facilities: a heat-preserving barrel, a sample plate, a temperature measuring instrument, a magnifier and heat-preserving cotton. Face mask, gloves, scarfing cinder hammer, chisel, file, wire brush, abrasive paper, steel ruler, level bar, activity wrench, straight mill, angle grinder. Wire cutters, hacksaw blades, labor protection supplies;

1.7), welding parameters: determining welding parameters according to welding equipment, welding materials and welding requirements;

step two, welding and repairing;

considering the particularity of welding repair of ferrous metal cast iron materials of a water tank of an electric reciprocating pump body, uniformly preheating a V-shaped groove and two sides of the V-shaped groove to reach a preheating temperature, then welding a bottom layer, performing welding along the same direction of a crack from bottom to top, adopting a regular triangle strip conveying method for welding rods, forming an included angle of 60-90 degrees between the welding rods and a vertical surface of a welding seam, adopting arc extinguishing operation to achieve single-side welding and double-side forming, adopting an air shovel to hammer welding meat after the welding of the bottom layer is completed, enabling the welding meat to be uniformly distributed with small pits, and then detecting to ensure that the welding seam does not have any welding defects; the filling layer and the cover surface layer adopt a multilayer and multi-pass welding method, in order to reduce heat loss and prevent an operator from being radiated by high temperature, the rest parts except the welding part are covered by heat insulation materials, welding rods are used for carrying out linear or small circle type strip conveying, welding is carried out by adopting a medium arc length of 5-8 mm, the welding seam of each section is not suitable to be overlong, each section is welded, the welding meat is hammered by a pneumatic shovel immediately to be welded, small pockmarks are uniformly distributed in the welding meat, then the welding meat on the upper surface of the welding bead is polished by a grinding wheel, the interlayer temperature is controlled to be not lower than 250 ℃, and then the next section is welded; and each layer of the filling layer and the cover surface layer is detected to ensure that no welding defect exists, after welding is finished, the temperature of the water tank of the electric reciprocating pump body is uniformly raised to 650-900 ℃ at the speed of 150 DEG/h, then the box body is covered by a heat-insulating cotton bundle and slowly cooled to room temperature, finally the box body which is welded is machined to meet the assembly size, and the box body is delivered for use after being detected to be qualified.

Furthermore, a Z308 welding rod with the diameter of 3.2mm is adopted as the bottom layer, the welding current is 80-95A, the voltage is 22 +/-1V, and the welding speed is 15 +/-1 cm/min; the filling layer and the cover layer adopt a Z308 welding rod with phi of 4.0mm, the welding current is 90-130A, the voltage is 23 +/-1V, and the welding speed is 15 +/-1 cm/min.

Further, before the first layer of backing welding, oxygen-acetylene flame, coal gas heating or electric heater is adopted for baking, and the two sides of the groove are preheated to 350 ℃.

Compared with the prior art, a repair technology of electronic reciprocal pump body water tank crackle welding set of wheel dephosphorization, not only safe easy operation, welding quality is stable, investment cost is lower, can satisfy on-the-spot actual demand, work efficiency is high, moreover greatly reduced cost of maintenance, reduced the rolling loss of shutting down of wheel, produced for reasonable various specification wheel and provided the guarantee.

Drawings

FIG. 1 is a schematic structural view of a crack welding device for a water tank of a wheel dephosphorization electric reciprocating pump body of the utility model;

FIG. 2 is a schematic view of the wheel dephosphorization electric reciprocating pump body water tank crack welding device during welding;

in the figure: 1. an electrically reciprocating pump body; 2. a base; 21. a base plate; 22. supporting legs; 23. a triangular fixing plate; 24. supporting feet of the pump body; 3. an upper pressure plate; 4. the back is connected with a fixed steel plate; 5. fixing a pulling plate on the bevel face; 6. a bolt; 7. a limiting hole; 8. a limiting groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The terms "upper", "lower", "left", "right", "front", "rear", and the like used in the specification and claims of the present disclosure are used only to indicate relative positional relationships, and when the absolute position of a described object is changed, the relative positional relationships are changed accordingly.

Example 1:

as shown in fig. 1 and fig. 2, the utility model relates to a wheel dephosphorization electric reciprocating pump body water tank crack welding device, which comprises a base 2, a back connection fixed steel plate 4 vertically detachably arranged at the rear side of the upper surface of the base 2, two bevel face fixed pull plates 5 respectively vertically detachably arranged at the front side of the upper surface of the base 2 at intervals, and an upper press plate 3 respectively vertically detachably connected and fixed with the back connection fixed steel plate 4 and the two bevel face fixed pull plates 5; the base 2 comprises a bottom plate 21 and a plurality of supporting legs 22 arranged at the bottom of the bottom plate 21; the upper pressing plate 3 and the back surface are fixedly connected with the upper ends of the fixed steel plate 4 and the two bevel face fixed pulling plates 5, and the bottom plate 21 and the back surface are fixedly connected with the lower ends of the fixed steel plate 4 and the two bevel face fixed pulling plates 5 through bolts 6. In this example, the shapes and the fixed positions of the bottom plate 21, the upper pressure plate 3, the back connection fixed steel plate 4 and the bevel face fixed pulling plate 5 in the welding device can be adjusted and manufactured according to the specifications of the fixed electric reciprocating pump body, so as to be suitable for the fixation of various electric reciprocating pump bodies and facilitate the welding repair of cracks on the electric reciprocating pump bodies. In this embodiment, the upper plate 3, the bottom plate 21 and the back connection fixing steel plate 4 are all made of 50mm steel plates, and the upper plate 3 and the bottom plate 21 can be provided with the limiting holes 7 and/or the limiting grooves 8 according to the specifications of the electric reciprocating pump body 1 to be placed, for example, the water tank of the electric reciprocating pump 1 in fig. 2 has a convex upper opening and a convex lower opening, so that the limiting holes 7 and/or the limiting grooves 8 can be correspondingly formed in the upper plate 3 and the bottom plate 21, and the electric reciprocating pump body 1 can be conveniently positioned and fixed in application, and therefore, the electric reciprocating pump body is convenient and practical. The supporting legs 22 are made of 50mm square steel; the bevel face fixed pull plate 5 is formed by cutting 10mm flat steel, and a welding port is formed between the two bevel face fixed pull plates 5, so that the welding operation is convenient. A plurality of triangular fixing plates 23 are welded between the supporting legs 22 and the bottom plate 21, and the triangular fixing plates 23 are formed by cutting 30mm steel plates; in this embodiment, the bottom plate 21 may further be provided with a pump body support leg 24 according to actual needs to support the water tank of the electric reciprocating pump 1, and the pump body support leg 24 may be made of a 50mm steel plate according to design. In this embodiment, the size, position, etc. of each component of the welding device can be adjusted appropriately according to the specification of the fixed electric reciprocating pump body 1 to meet the welding requirement.

Example 2:

based on embodiment 1, a repair process of a wheel dephosphorization electric reciprocating pump body water tank crack welding device is used for welding repair of electric reciprocating pump body water tank cracks, the welding device carries out blanking manufacture according to the model size of an electric reciprocating pump body 1 to be repaired, firstly, a V-shaped groove 7 is formed along the electric reciprocating pump body 1 water tank cracks, then a base 2 is erected, the electric reciprocating pump body 1 is placed on the base 21, a back connection fixing steel plate 4 and two bevel face fixing pull plates 5 are respectively arranged on the front side and the back side of the base 21, it is ensured that the water tank cracks to be welded and repaired are located between the two bevel face fixing pull plates 5, finally, an upper pressure plate 3 is arranged to fix the electric reciprocating pump body 1, and then welding is carried out, and the steps are as follows:

step one, preparing before welding;

1.1, welding equipment: HT400D digital control inversion type manual direct current welding machine, wherein welding materials adopt Z308 welding rods with the diameter of 3.2mm and the diameter of 4.0mm, and the welding rods are baked for 2 hours at the temperature of 200-250 ℃ and then are kept at constant temperature and taken at any time;

1.2, welding position: vertical welding;

1.3, cleaning before welding: the welding position area and the welding rod are not required to have oil stain, an oxide layer, moisture and the like, the metallic luster is exposed, oxyacetylene flame is used for removing the moisture and the oil inside and outside the groove, and then the groove is polished by using abrasive cloth or a grinding wheel machine for derusting;

1.4, welding requirement: the single-side welding and double-side forming welding technology is adopted, and a surfacing layer fuses base materials to prevent white spots and hardening tissues;

1.5, weldment material: casting iron;

1.6, auxiliary facilities: a heat-preserving barrel, a sample plate, a temperature measuring instrument, a magnifier and heat-preserving cotton. Face mask, gloves, scarfing cinder hammer, chisel, file, wire brush, abrasive paper, steel ruler, level bar, activity wrench, straight mill, angle grinder. Wire cutters, hacksaw blades, labor protection items (work clothes, shoes, hats, planoscopes);

1.7, welding parameters: determining welding parameters according to welding equipment, welding materials and welding requirements;

manual shielded metal arc welding process parameters

Step two, welding and repairing;

considering the particularity of welding repair of ferrous metal cast iron materials of the water tank of the electric reciprocating pump body 1, before backing welding of the first layer, uniformly preheating the V-shaped groove 7 and two sides of the V-shaped groove to reach a preheating temperature of about 350 ℃, wherein oxygen-acetylene flame, gas heating or an electric heater can be used for roasting, and the temperature is required to rise uniformly during preheating so as to avoid nonuniform high-temperature heating to cause microcracks in the parent metal; then, welding a bottom layer, wherein welding is carried out along the same direction of a crack from bottom to top, the welding rod adopts a regular triangle strip conveying method, an included angle of 60-90 degrees is formed between the welding rod and the vertical surface of a welding seam, and arc extinguishing operation is adopted for achieving the double-sided forming of single-sided welding due to the fact that the groove gaps are different in size; after the welding of the bottom layer is finished, the welding meat is hammered by an air shovel to be uniformly distributed with small pits, so that crystal grains can be elongated, the structure is compact, partial welding stress is eliminated, and then the welding seam is ensured to have no welding defect through visual inspection and detection of a 5-time magnifier; the filling layer and the cover layer adopt a multilayer and multi-pass welding method, in order to reduce heat loss and prevent an operator from being irradiated by high temperature, the rest parts except the welding part are covered by asbestos plates or other heat insulation materials, and meanwhile, welding is not carried out in a place with cross wind; when the filling layer and the cover surface layer are welded, the welding rod is used for carrying out straight line or small-circle-drawing conveying, welding is carried out by adopting a medium arc length of 5-8 mm, each section of welding line is not longer, one section of welding line is generally 100-150mm, each section of welding line is welded, the welding meat is hammered by using a pneumatic shovel immediately to enable the welding meat to be uniformly distributed with small pits, crystal grains are elongated, the structure is compact, part of welding stress is eliminated, then the welding meat on the upper surface of the welding path is polished by using a grinding wheel, the temperature between layers is controlled to be optimal but can not be lower than 250 ℃, and then the next section is welded; each layer of the filling layer and the cover surface layer needs to be detected to ensure that no welding defect exists, after welding is completed, the water tank of the electric reciprocating pump body 1 is uniformly heated to 650-900 ℃ at a speed of 150 DEG/h to reduce the hardening degree and avoid embrittlement, then the box body is covered by a heat-insulating cotton bale and slowly cooled to room temperature, finally the welded box body is machined to meet the assembly size, the requirements of installation of the whole cast iron box body and other rolling assemblies and die holders are completely met through on-site actual sample plate inspection and acceptance, delivery and use are realized, and the mechanical performance using effect is achieved through periodic wheel dephosphorization rolling operation inspection.

The above is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope defined by the claims.

Claims (6)

1. The utility model provides an electronic reciprocal pump body water tank crack welding set of wheel dephosphorization, its characterized in that, it includes base (2), can dismantle perpendicularly and set up back connection fixed steel sheet (4) at base (2) upper surface rear side, can dismantle perpendicularly respectively that the interval sets up two bevel face fixed arm-tie (5) at base (2) upper surface front side and with back connection fixed steel sheet (4) and two bevel face fixed arm-tie (5) can dismantle perpendicularly respectively and connect fixed top board (3).

2. The crack welding device for the water tank of the wheel dephosphorization electric reciprocating pump body according to the claim 1, characterized in that the base (2) comprises a bottom plate (21) and a plurality of supporting feet (22) arranged at the bottom of the bottom plate (21).

3. The wheel dephosphorization electric reciprocating pump body water tank crack welding device according to claim 2, characterized in that the upper pressure plate (3) and the back connection fixing steel plate (4) and the upper ends of the two bevel face fixing pulling plates (5) as well as the bottom plate (21) and the back connection fixing steel plate (4) and the lower ends of the two bevel face fixing pulling plates (5) are fixedly connected through bolts (6).

4. The device for welding the cracks on the water tank of the wheel dephosphorization electric reciprocating pump body according to the claim 2 or 3, characterized in that a plurality of triangular fixing plates (23) are welded between the supporting legs (22) and the bottom plate (21).

5. The wheel dephosphorization electric reciprocating pump body water tank crack welding device according to claim 4, characterized in that a pump body supporting foot (24) is further arranged on the bottom plate (21).

6. The device for welding the cracks of the water tank of the wheel dephosphorization electric reciprocating pump body according to claim 4, wherein the upper pressure plate (3) and the bottom plate (21) are further provided with a limiting hole (7) and/or a limiting groove (8).

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