Welding equipment for acid-resistant pump shell wax mold and sprue wax rod

Abstract

The invention discloses welding equipment for an acid-resistant pump shell wax mold and a pouring gate wax rod, and relates to the technical field of welding, the welding equipment comprises a pouring gate wax rod conveying device and a wax mold conveying device, a plurality of lifting type fixing structures are arranged on the pouring gate wax rod conveying device at equal intervals, and a plurality of stabilizing structures are arranged on the wax mold conveying device at equal intervals; the pouring gate wax rod and wax mold melting device has the advantages that the pouring gate wax rod and wax mold melting device is controlled by the lifting device to move up and down so as to be in contact with the pouring gate wax rod and the wax mold respectively, and the temperature of the pouring gate wax rod and the temperature of the wax mold melting area are maintained by the aid of the heat preservation structure; and then the lifting type fixing structure drives the pouring gate wax rod to move to be in contact with the wax mold to complete welding, the problem of waste caused by the fact that the hot knife melts more materials on the surfaces of the pouring gate wax rod and the wax mold is solved, the situation that temperature is transmitted into the wax mold to affect the quality of the wax mold is avoided, and therefore the problem that the production quality of the acid-resistant pump is affected is solved.

Description

Technical Field

[0001] The invention relates to the technical field of welding, and in particular to welding equipment for an acid-resistant pump casing wax mold and a pouring wax rod. Background Art

[0002] An acid-resistant pump is a pump developed and produced based on a pump using materials with acid-resistant properties. During production, it is usually necessary to first make a wax mold, then weld the wax mold to a sprue wax rod using welding equipment, then immerse the wax mold in the slurry to make a shell membrane, and finally pour the molten metal along the sprue to achieve the casting of the acid-resistant pump shell.

[0003] The invention patent with the existing patent publication number CN117943510A discloses an acid-resistant pump casing wax mold and a sprue wax rod welding device and its production process. The wax mold is conveniently fixed on a fixed seat by setting a pressing mechanism, thereby improving the stability of the position of the wax mold in the mounting groove, and then reducing the sliding of the wax mold in the process of the hydraulic cylinder driving the hot knife to heat the wax mold, which is conducive to improving the efficiency of the hot knife welding the wax mold and the sprue wax rod.

[0004] However, this invention patent still has the following problems: the position of the hot knife is fixed, and after the gate wax rod and the wax mold are in contact, the hot knife contacts the intersection of the gate wax rod and the wax mold, so that the hot knife will cut in from the sides of the gate wax rod and the wax mold, resulting in more melting of the gate wax rod or the surface of the wax mold and waste, and since the position height of the gate wax rod and the wax mold will deviate when they are fixed, it will further lead to welding deviation, that is, more of the gate wax rod or the surface of the wax mold will be melted, not only wasting more material, but also the temperature will easily be transferred to the inside of the wax mold and affect the quality of the wax mold, thereby affecting the production quality of the acid-resistant pump. Summary of the invention

[0005] The purpose of the present invention is to provide a welding device for an acid-resistant pump casing wax mold and a sprue wax rod, which solves the problems raised in the above-mentioned background technology.

[0006] In order to solve the above technical problems, the present invention specifically provides the following technical solutions:

[0007] A welding device for an acid-resistant pump casing wax mold and a sprue wax rod, comprising a sprue wax rod conveying device and a wax mold conveying device, wherein the sprue wax rod conveying device is located directly above the wax mold conveying device, a plurality of lifting fixing structures for fixing the sprue wax rod are arranged at equal intervals on the sprue wax rod conveying device, and the lifting fixing structures can drive the sprue wax rod to move in a direction perpendicular to the conveying surface of the sprue wax rod conveying device, a plurality of stabilizing structures for fixing the wax mold are arranged at equal intervals on the wax mold conveying device, a bracket is arranged on one side of the wax mold conveying device, a positioning structure and a heat preservation structure are arranged on the bracket, a mounting frame is arranged at one end of the wax mold conveying device, a lifting device is arranged on the mounting frame, a connecting seat is arranged on the lifting device, a telescopic device moving along the conveying direction of the wax mold conveying device is arranged on the connecting seat, a knife holder is arranged at the end of the telescopic device, and a hot knife for welding is arranged on the knife holder;

[0008] The positioning structure is used to limit the distance that the tool holder moves in the vertical direction, and the heat preservation structure is used to maintain the temperature of the welding area.

[0009] As a preferred solution of the present invention, the positioning structure includes a support plate arranged on a bracket and parallel to the conveying surface of the wax model conveying device, a vertical plate perpendicular to the conveying surface of the wax model conveying device is arranged on the support plate, a moving device moving along the vertical direction is arranged on the vertical plate, a connecting plate slidably connected to the vertical plate is arranged on the moving device, two mutually parallel positioning plates are arranged on the connecting plate, and both of the positioning plates are parallel to the conveying surface of the wax model conveying device.

[0010] As a preferred solution of the present invention, one side of the vertical plate is provided with two extension rods parallel to the positioning plate, and the two positioning plates are located between the two extension rods, the two extension rods are commonly connected with a plurality of sliding rods, and the plurality of sliding rods are commonly slidably connected with a slide plate connected to the connecting plate, one side of the slide plate is provided with two arc-shaped guard plates, the inner side walls of the two arc-shaped guard plates are both provided with elastic scrapers for cleaning the surface of the hot knife, and when the two elastic scrapers are not in contact with the hot knife, the ends of the two elastic scrapers are in contact with each other, the inner side wall of one of the arc-shaped guard plates is concave and is provided with a discharge pipe, and the discharge pipe is located on the side of the elastic scraper away from the mounting frame;

[0011] The two arc-shaped guard plates are located on both sides of the horizontal plane where the midpoint of the center line of the two positioning plates is located. The outer arc surfaces of the two arc-shaped guard plates are away from the tool holder, the inner arc surface of one of the arc-shaped guard plates faces the inner arc surface of the other arc-shaped guard plate, and the discharge pipe is located on the lower arc-shaped guard plate.

[0012] As a preferred solution of the present invention, the two arc-shaped guard plates are staggered with each other, and the distance between the upper arc-shaped guard plate and the mounting frame is smaller than the distance between the lower arc-shaped guard plate and the mounting frame.

[0013] As a preferred solution of the present invention, a rotating device is arranged on the outer side of the wax model conveying device, an elastic connecting rod is connected to the rotating device, and a knocking ball for knocking the discharge pipe is arranged on the elastic connecting rod.

[0014] As a preferred solution of the present invention, the discharge pipe is connected to a ventilation pipe for providing warm air, and heating elements are provided on the two arc-shaped guard plates.

[0015] As a preferred solution of the present invention, the thermal insulation structure includes a top plate arranged on a bracket, two side plates are arranged at the bottom of the top plate, electric heating elements are arranged on the opposite sides of the two side plates, blowing devices are arranged on the opposite sides of the two side plates, and each of the side plates is provided with a through hole for air flow to pass through.

[0016] As a preferred solution of the present invention, the electric heating element and the blowing device are provided in plurality, and the plurality of electric heating elements and the plurality of blowing devices are evenly divided into a plurality of groups from top to bottom, and the plurality of groups of the electric heating elements correspond one to one with the plurality of groups of blowing devices.

[0017] As a preferred solution of the present invention, the lifting fixed structure includes a base arranged on the gate wax stick conveying device, the base is provided with a slot for placing the gate wax stick, a two-way drive assembly is arranged on the top of the base, two arc-shaped clamping plates are arranged on the two-way drive assembly, and a pushing device is arranged at the bottom of the slot.

[0018] As a preferred solution of the present invention, the stabilizing structure includes a fixed seat arranged on the wax model conveying device, the fixed seat is provided with a workpiece groove for placing the wax model, a pressure plate is slidably connected in the workpiece groove, a clamping screw is arranged on one side of the pressure plate, and one end of the clamping screw passes through the workpiece groove to the outside of the fixed seat.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present invention controls the up and down movement of the hot knife through a lifting device to contact the gate wax rod and the wax mold respectively, and maintains the temperature of the melting area of ​​the gate wax rod and the wax mold through a heat preservation structure, and then the lifting fixed structure drives the gate wax rod to move until it contacts the wax mold to complete the welding, thereby avoiding the problem of waste caused by the hot knife melting more materials on the surface of the gate wax rod and the wax mold, and avoiding the temperature from being transferred to the inside of the wax mold to affect the quality of the wax mold, thereby avoiding the problem of acid-resistant pump production quality being affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0022] Figure 1 A structural schematic diagram of a first-view device for welding an acid-resistant pump casing wax mold and a sprue wax rod is provided for an embodiment of the present invention;

[0023] Figure 2 A structural schematic diagram of a second viewing angle of a welding device for an acid-resistant pump casing wax mold and a sprue wax rod is provided for an embodiment of the present invention;

[0024] Figure 3 A partial structural schematic diagram of a welding device for an acid-resistant pump casing wax mold and a sprue wax rod from a first perspective is provided for an embodiment of the present invention;

[0025] Figure 4 A partial structural schematic diagram of a second viewing angle of a welding device for an acid-resistant pump casing wax mold and a sprue wax rod is provided for an embodiment of the present invention;

[0026] Figure 5 A schematic diagram of the structure of the positioning structure and the heat preservation structure is provided for an embodiment of the present invention;

[0027] Figure 6 A structural schematic diagram of a lifting type fixed structure is provided for an embodiment of the present invention;

[0028] Figure 7 Provided for embodiments of the present invention Figure 5 A schematic diagram of the structure enlargement of part A shown in FIG.

[0029] Figure 8 Provided for embodiments of the present invention Figure 3 The enlarged schematic diagram of the structure of part B shown in FIG.

[0030] Fig. 9 Provided for embodiments of the present invention Figure 3 An enlarged schematic diagram of the structure of part C is shown in FIG.

[0031] The numbers in the figure represent the following:

[0032] 1. Gate wax stick conveying device; 2. Wax model conveying device; 3. Bracket; 4. Positioning structure; 5. Insulation structure; 6. Lifting device; 7. Connecting seat; 8. Telescopic device; 9. Knife holder; 10. Hot knife; 11. Lifting fixed structure; 12. Stable structure; 13. Rotating device; 14. Elastic connecting rod; 15. Knocking ball; 16. Mounting frame;

[0033] 401, support plate; 402, vertical plate; 403, moving device; 404, connecting plate; 405, positioning plate; 406, extension rod; 407, sliding rod; 408, sliding plate; 409, arc-shaped guard plate; 410, elastic scraper; 411, discharge pipe; 501, top plate; 502, side plate; 503, electric heating element; 504, blowing device; 111, base; 112, slot; 113, two-way drive assembly; 114, arc-shaped clamping plate; 115, pushing device; 121, fixed seat; 122, workpiece slot; 123, pressing plate; 124, pressing screw. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] like Figures 1 to 9 As shown, the present invention provides an acid-resistant pump casing wax mold and a pouring wax rod welding device, comprising a pouring wax rod conveying device 1 and a wax mold conveying device 2, and the pouring wax rod conveying device 1 is located directly above the wax mold conveying device 2, and a plurality of lifting fixing structures 11 for fixing the pouring wax rod are evenly spaced on the pouring wax rod conveying device 1, and the lifting fixing structure 11 can drive the pouring wax rod to move in a direction perpendicular to the conveying surface of the pouring wax rod conveying device 1, and a plurality of stabilizing structures 12 for fixing the wax mold are evenly spaced on the wax mold conveying device 2, a bracket 3 is provided on one side of the wax mold conveying device 2, a positioning structure 4 and a heat preservation structure 5 are provided on the bracket 3, a mounting frame 16 is provided at one end of the wax mold conveying device 2, a lifting device 6 is provided on the mounting frame 16, a connecting seat 7 is provided on the lifting device 6, a telescopic device 8 moving along the conveying direction of the wax mold conveying device 2 is provided on the connecting seat 7, a tool holder 9 is provided at the end of the telescopic device 8, and a hot knife 10 for welding is provided on the tool holder 9.

[0036] The positioning structure 4 is used to limit the distance that the tool holder 9 moves in the vertical direction, and the heat preservation structure 5 is used to maintain the temperature of the welding area.

[0037] When the present application is implemented, the wax mold is placed on the stable structure 12 for fixation, the pouring wax stick 1 is fixed on the lifting fixed structure 11, the pouring wax stick conveying device 1 conveys multiple pouring wax sticks on the lifting fixed structure 11 to the front of the hot knife 10 in sequence, and the wax mold conveying device 2 conveys multiple wax molds on the stable structure 12 to the front of the hot knife 10 in sequence, and the wax mold is located directly below the pouring wax stick.

[0038] Then the telescopic device 8 drives the tool holder 9 to drive the hot knife 10 to move forward to the bottom of the gate wax stick, and then the lifting device 6 drives the connecting seat 7 to move upward until the hot knife 10 contacts the gate wax stick, and then the lifting device 6 drives the connecting seat 7 to move downward until the hot knife 10 contacts the wax model, and then the telescopic device 8 drives the tool holder 9 to drive the hot knife 10 to reset, and finally the lifting fixed structure 11 drives the gate wax stick downward to contact the melted part of the wax model surface, thereby completing the welding.

[0039] The heat preservation structure 5 is used to maintain the temperature of the melting area of ​​the gate wax rod and the wax mold, avoid partial solidification of the melting area of ​​the gate wax rod and the wax mold, and ensure the welding quality of the gate wax rod and the wax mold.

[0040] The positioning structure 4 limits the distance of the tool holder 9 moving up and down, thereby preventing the hot knife 10 from melting the gate wax stick and the wax mold too much, avoiding material waste and damage to the workpiece (ie, the gate wax stick and the wax mold).

[0041] In this embodiment, the gate wax stick conveying device 1 and the wax model conveying device 2 are both existing conveying devices, such as chain conveyors, etc., and the lifting device 6 and the telescopic device 8 are also existing technologies. For example, the lifting device 6 is a motor-driven screw, and the telescopic device 8 is a cylinder, etc., and the technical principles are not elaborated in detail.

[0042] After the welding of the gate wax rod and the wax mold is completed, the lifting fixed structure 11 releases the restriction on the gate wax rod, and the stabilizing structure 12 also releases the fixation of the wax mold. At this time, the welded gate wax rod and wax mold are removed, and then the gate wax rod conveying device 1 and the wax mold conveying device 2 continue to move, and then the above operation is repeated.

[0043] The positioning structure 4 includes a support plate 401 arranged on the bracket 3 and parallel to the conveying surface of the wax model conveying device 2, a vertical plate 402 perpendicular to the conveying surface of the wax model conveying device 2 is arranged on the support plate 401, a moving device 403 moving along the vertical direction is arranged on the vertical plate 402, and a connecting plate 404 slidingly connected to the vertical plate 402 is arranged on the moving device 403, and two mutually parallel positioning plates 405 are arranged on the connecting plate 404, and the two positioning plates 405 are parallel to the conveying surface of the wax model conveying device 2.

[0044] When the tool holder 9 is driven by the telescopic device 8 to move between the two positioning plates 405, the hot knife 10 is located between the gate wax rod and the wax mold. The two positioning plates 405 limit the up and down movement distance of the tool holder 9, thereby preventing the hot knife 10 from moving up and down too much and causing damage to the gate wax rod and the wax mold.

[0045] The connecting plate 404 is driven up and down by the moving device 403, so that the positions of the two positioning plates 405 in the vertical direction can be adjusted (the distance between the two positioning plates 405 remains unchanged) so as to be suitable for gate wax sticks and wax molds of different heights, that is, different sizes of wax molds can also be used.

[0046] In this embodiment, the moving device 403 is a conventional technology, such as a motor-driven screw, etc., and the technical principle will not be elaborated in detail here.

[0047] Two extension rods 406 parallel to the positioning plates 405 are provided on one side of the vertical plate 402, and the two positioning plates 405 are located between the two extension rods 406, and a plurality of sliding rods 407 are commonly connected to the two extension rods 406, and the plurality of sliding rods 407 are commonly slidably connected to a slide plate 408 connected to the connecting plate 404, and two arc-shaped guard plates 409 are provided on one side of the slide plate 408, and elastic scrapers 410 for cleaning the surface of the hot knife 10 are provided on the inner side walls of the two arc-shaped guard plates 409, and when the two elastic scrapers 410 are not in contact with the hot knife 10, the ends of the two elastic scrapers 410 are in contact with each other, and the inner side wall of one of the arc-shaped guard plates 409 is concave and is provided with a discharge pipe 411, and the discharge pipe 411 is located on the side of the elastic scraper 410 away from the mounting frame 16.

[0048] The two arc-shaped guard plates 409 are located on both sides of the horizontal plane where the midpoint of the center line of the two positioning plates 405 is located. The outer arc surfaces of the two arc-shaped guard plates 409 are away from the tool holder 9, and the inner arc surface of one arc-shaped guard plate 409 faces the inner arc surface of the other arc-shaped guard plate 409. The discharge pipe 411 is located on the lower arc-shaped guard plate 409.

[0049] After the hot knife 10 melts the gate wax rod and the wax mold, the telescopic device 8 drives the hot knife 10 to reset. During the resetting process of the hot knife 10, the hot knife 10 enters the two arc-shaped guard plates 409 and squeezes the two elastic scrapers 410 to bend and deform, thereby cleaning the debris (such as wax) attached to and solidified on the surface of the hot knife 10.

[0050] After the two elastic scrapers 410 are separated from the surface of the hot knife 10, the two arc-shaped guard plates 409 limit the splashing of debris bounced by the elastic scrapers 410 and gather on the arc-shaped guard plate 409 below. The discharge pipe 411 discharges the melted material to a designated location.

[0051] The extension rod 406 is connected to the vertical plate 402, and the slide plate 408 is restricted by the slide rod 407 so that the slide plate 408 can only move in the vertical direction. Therefore, when the moving device 403 drives the connecting plate 404 to move up and down, the slide plate 408 is driven to move synchronously through the connecting plate 404, so that the two arc-shaped guard plates 409 and the two positioning plates 405 are adjusted in position synchronously to avoid interference with the ironing knife 10.

[0052] The two arc-shaped guard plates 409 are staggered with each other, and the distance between the upper arc-shaped guard plate 409 and the mounting frame 16 is smaller than the distance between the lower arc-shaped guard plate 409 and the mounting frame 16 .

[0053] The two arc-shaped guard plates 409 are offset from each other, so that the debris bounced off by the elastic scraper 410 can fall onto the lower arc-shaped guard plate 409 after contacting the upper arc-shaped guard plate 409, so that it can be collected to avoid splashing and polluting the environment.

[0054] A rotating device 13 is arranged outside the wax model conveying device 2 , and an elastic connecting rod 14 is connected to the rotating device 13 . A knocking ball 15 for knocking the discharge pipe 411 is arranged on the elastic connecting rod 14 .

[0055] The rotating device 13 drives the elastic connecting rod 14 to drive the knocking ball 15 to rotate, thereby cyclically knocking the discharge pipe 411 to assist in the discharge of debris in the discharge pipe 411.

[0056] The discharge pipe 411 is connected to a ventilation pipe for providing warm air, and heating elements are provided on both arc-shaped guard plates 409 .

[0057] Warm air is introduced into the discharge pipe 411 through the vent pipe to increase the temperature inside the discharge pipe 411. The heating element increases the surface temperature of the two arc-shaped guard plates 409, thereby avoiding the problem of debris solidifying quickly and becoming difficult to discharge.

[0058] The insulation structure 5 includes a top plate 501 arranged on the bracket 3, and two side plates 502 are arranged at the bottom of the top plate 501. Electric heating elements 503 are arranged on the opposite sides of the two side plates 502, and blowing devices 504 are arranged on the opposite sides of the two side plates 502. Each side plate 502 is provided with a through hole for air flow to pass through.

[0059] There are multiple electric heating elements 503 and multiple blowing devices 504, and the multiple electric heating elements 503 and multiple blowing devices 504 are evenly divided into multiple groups from top to bottom, and the multiple groups of electric heating elements 503 correspond to the multiple groups of blowing devices 504 one by one.

[0060] By setting up multiple groups of blowing devices 504, the heat generated by multiple groups of electric heating elements 503 is blown to the melted area of ​​the gate wax rod and the wax mold, thereby avoiding rapid solidification of the melted area of ​​the gate wax rod and the wax mold, thereby ensuring the quality of welding of the gate wax rod and the wax mold.

[0061] In this embodiment, the heating element and the electric heating element 503 are both existing technologies, such as resistance wires, etc. The blowing device 504 can be a small fan, etc., which is also existing technology. The technical principles will not be elaborated in detail here.

[0062] The lifting fixed structure 11 includes a base 111 arranged on the gate wax stick conveying device 1, and a slot 112 for placing the gate wax stick is opened on the base 111. A two-way driving component 113 is arranged on the top of the base 111, and two arc-shaped clamping plates 114 are arranged on the two-way driving component 113. A pushing device 115 is arranged at the bottom of the slot 112.

[0063] The gate wax stick is inserted into the slot 112, and the two arc-shaped clamps 114 are driven by the bidirectional driving assembly 113 to move toward each other until they abut against the surface of the gate wax stick to fix the gate wax stick, so that the gate wax stick can be stably transported to the designated position for welding through the gate wax stick conveying device 1.

[0064] The pushing device 115 abuts against the bottom of the fixed gate wax rod. After the hot knife 10 contacts the gate wax rod and the wax mold, the pushing device 115 drives the gate wax rod to move downward until it contacts the wax mold, thereby completing welding.

[0065] Further, the pushing device 115 can be arranged at the bottom of the base 111 , that is, the pushing device 115 is arranged on the conveying surface of the sprue wax stick conveying device 1 , and the pushing device 115 is on the base 111 .

[0066] In this embodiment, the bidirectional driving component 113 and the pushing device 115 are both existing technologies. For example, the bidirectional driving component 113 is a bidirectional threaded rod driven by a motor, and the pushing device 115 can be an electric push rod or a cylinder, etc. The technical principles will not be elaborated in detail here.

[0067] The stabilizing structure 12 includes a fixed seat 121 arranged on the wax model conveying device 2, and a workpiece groove 122 for placing the wax model is opened on the fixed seat 121. A pressure plate 123 is slidably connected in the workpiece groove 122. A clamping screw 124 is arranged on one side of the pressure plate 123, and one end of the clamping screw 124 passes through the workpiece groove 122 to the outside of the fixed seat 121.

[0068] The wax model is placed on the fixing seat 121, and the pressing screw 124 is rotated so that the pressing screw 124 drives the pressing plate 123 to abut against one side of the wax model, thereby fixing the wax model to prevent the wax model from moving and affecting the welding quality.

[0069] In this embodiment, the pressing screw 124 can be driven by a motor or rotated manually.

[0070] The above embodiments are only exemplary embodiments of the present application and are not intended to limit the present application. The protection scope of the present application is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present application within the essence and protection scope of the present application, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present application.

Claims

1. A welding device for an acid-resistant pump casing wax mold and a sprue wax rod, comprising a sprue wax rod conveying device (1) and a wax mold conveying device (2), wherein the sprue wax rod conveying device (1) is located directly above the wax mold conveying device (2), and is characterized in that: The gate wax stick conveying device (1) is provided with a plurality of lifting fixing structures (11) for fixing the gate wax sticks at equal intervals, and the lifting fixing structures (11) can drive the gate wax sticks to move in a direction perpendicular to the conveying surface of the gate wax stick conveying device (1); the wax model conveying device (2) is provided with a plurality of stabilizing structures (12) for fixing the wax model at equal intervals; a bracket (3) is provided on one side of the wax model conveying device (2); a positioning structure (4) and a heat preservation structure (5) are provided on the bracket (3); a mounting frame (16) is provided at one end of the wax model conveying device (2); a lifting device (6) is provided on the mounting frame (16); a connecting seat (7) is provided on the lifting device (6); a telescopic device (8) moving along the conveying direction of the wax model conveying device (2) is provided on the connecting seat (7); a knife holder (9) is provided at the end of the telescopic device (8); a hot knife (10) for welding is provided on the knife holder (9); The positioning structure (4) is used to limit the distance that the tool holder (9) moves in the vertical direction, and the heat-insulating structure (5) is used to maintain the temperature of the welding area.

2. The welding equipment for acid-resistant pump casing wax mold and gate wax rod according to claim 1, characterized in that: The positioning structure (4) comprises a support plate (401) arranged on the bracket (3) and parallel to the conveying surface of the wax model conveying device (2); the support plate (401) is provided with a vertical plate (402) perpendicular to the conveying surface of the wax model conveying device (2); the vertical plate (402) is provided with a moving device (403) moving in a vertical direction; the moving device (403) is provided with a connecting plate (404) slidably connected to the vertical plate (402); the connecting plate (404) is provided with two mutually parallel positioning plates (405), and the two positioning plates (405) are parallel to the conveying surface of the wax model conveying device (2).

3. The welding equipment for acid-resistant pump casing wax mold and gate wax rod according to claim 2, characterized in that: Two extension rods (406) parallel to the positioning plate (405) are arranged on one side of the vertical plate (402), and the two positioning plates (405) are located between the two extension rods (406), and the two extension rods (406) are commonly connected with a plurality of sliding rods (407), and the plurality of sliding rods (407) are commonly slidably connected with a slide plate (408) connected to the connecting plate (404), and two arc-shaped guard plates (409) are arranged on one side of the slide plate (408). The inner side walls of the arc-shaped guard plates (409) are each provided with an elastic scraper (410) for cleaning the surface of the hot knife (10), and when the two elastic scrapers (410) are not in contact with the hot knife (10), the ends of the two elastic scrapers (410) are in contact with each other, and the inner side wall of one of the arc-shaped guard plates (409) is concave and provided with a discharge pipe (411), and the discharge pipe (411) is located on the side of the elastic scraper (410) away from the mounting frame (16); The two arc-shaped guard plates (409) are located on both sides of the horizontal plane where the midpoint of the center line connecting the two positioning plates (405) is located, and the outer arc surfaces of the two arc-shaped guard plates (409) are both away from the tool holder (9), and the inner arc surface of one of the arc-shaped guard plates (409) faces the inner arc surface of the other arc-shaped guard plate (409), and the discharge pipe (411) is located on the lower arc-shaped guard plate (409).

4. The welding equipment for acid-resistant pump casing wax mold and gate wax rod according to claim 3, characterized in that: The two arc-shaped guard plates (409) are arranged in a staggered manner, and the distance between the upper arc-shaped guard plate (409) and the mounting frame (16) is smaller than the distance between the lower arc-shaped guard plate (409) and the mounting frame (16).

5. The welding equipment for acid-resistant pump casing wax mold and gate wax rod according to claim 3, characterized in that: A rotating device (13) is arranged outside the wax model conveying device (2), an elastic connecting rod (14) is connected to the rotating device (13), and a knocking ball (15) for knocking the discharge pipe (411) is arranged on the elastic connecting rod (14).

6. The welding equipment for acid-resistant pump casing wax mold and gate wax rod according to claim 3, characterized in that: The discharge pipe (411) is connected to a ventilation pipe for providing warm air, and heating elements are provided on both of the arc-shaped guard plates (409).

7. The welding equipment for acid-resistant pump casing wax mold and gate wax rod according to claim 1, characterized in that: The heat-insulating structure (5) comprises a top plate (501) arranged on a bracket (3); two side plates (502) are arranged at the bottom of the top plate (501); electric heating elements (503) are arranged on opposite sides of the two side plates (502); air blowing devices (504) are arranged on opposite sides of the two side plates (502); and each side plate (502) is provided with a through hole for air flow to pass through.

8. The welding equipment for acid-resistant pump casing wax mold and gate wax rod according to claim 7, characterized in that: The electric heating element (503) and the blowing device (504) are provided in plurality, and the plurality of electric heating elements (503) and the plurality of blowing devices (504) are evenly divided into a plurality of groups from top to bottom, and the plurality of groups of the electric heating elements (503) correspond one to one with the plurality of groups of blowing devices (504).

9. The welding equipment for acid-resistant pump casing wax mold and gate wax rod according to claim 1, characterized in that: The lifting fixed structure (11) comprises a base (111) arranged on the pouring wax stick conveying device (1), a slot (112) for placing the pouring wax stick is provided on the base (111), a bidirectional driving component (113) is provided on the top of the base (111), two arc-shaped clamping plates (114) are provided on the bidirectional driving component (113), and a pushing device (115) is provided at the bottom of the slot (112).

10. The welding equipment for acid-resistant pump casing wax mold and gate wax rod according to claim 1, characterized in that: The stabilizing structure (12) comprises a fixed seat (121) arranged on the wax model conveying device (2), the fixed seat (121) is provided with a workpiece groove (122) for placing the wax model, a pressure plate (123) is slidably connected in the workpiece groove (122), a clamping screw (124) is arranged on one side of the pressure plate (123), and one end of the clamping screw (124) passes through the workpiece groove (122) to the outside of the fixed seat (121).

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