Filtering device for resin pump liquid inlet pipeline of nodular cast iron pipe core making machine

Abstract

The utility model discloses a resin pump liquid inlet pipeline filtering device of a nodular cast iron pipe core making machine, and belongs to the technical field of resin pump pipeline filtering devices. A resin pump is arranged at the front end of the box body, a curing agent pump is arranged on one side of the resin pump, a liquid inlet is formed in the front end face of the box body, the resin pump and the curing agent pump are fixedly connected with the liquid inlet through a liquid inlet pipe, a filter is arranged on the liquid inlet pipe, and the filter is a Y-shaped flushing and deslagging filter. The filter comprises a water conveying main pipe and a filter pipe, and the filter pipe is located at the lower end of the water conveying main pipe and communicated with the water conveying main pipe. The resin pump solves the problems that a liquid inlet of a resin pump of existing equipment is formed in the back face of a box body, an oil suction pipeline is long and narrow, air suction is caused by too large liquid resistance, cavitation is formed, internal parts of a gear pump are damaged, the fault rate of the gear pump is high, and the service life of the gear pump is short, the liquid inlet of the resin pump is moved to the front face of the box body, the length of the liquid inlet pipeline is shortened, and liquid suction resistance is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of resin pump pipeline filtering devices, in particular to a ductile iron pipe core machine resin pump liquid inlet pipeline filtering device. Background Art

[0002] The resin pump currently used in the ductile iron pipe core machine is a hydraulic gear pump, model CB-BNS4. When working, the gear pump extracts the resin in the box according to the flow rate, mixes it with the molding sand to form a sand core material, and then injects it into the core box. Then, triethylamine is blown in to solidify the core sand, thereby obtaining a sand core with a smooth surface and precise size.

[0003] However, the prior art also has the following defects:

[0004] 1. The liquid inlet of the resin pump of the existing equipment is set on the back of the box, and the oil suction pipeline is narrow and long (about 3 meters in length). Excessive liquid resistance will cause suction, resulting in cavitation and damage to the internal parts of the gear pump. The gear pump has a high failure rate and a short service life.

[0005] 2. The resin pump inlet of the existing equipment is equipped with a hydraulic oil filter with a filtration accuracy of 20 microns. The purpose is to filter impurities in the resin component to reduce parts wear and ensure the life of the gear pump. In actual use, there are many impurities in the resin liquid, and the viscosity is high, which is easy to solidify. However, the filter element with a filtration accuracy of 20um is very easy to clog, which makes the gear pump inlet liquid resistance greater, the gear pump is damaged more frequently, and the resin flow stability is also correspondingly worse. The frequent replacement of the resin pump and the filter element has a great impact on the maintenance cost and the stability of production and process. Utility Model Content

[0006] The utility model aims to provide a ductile iron pipe core machine resin pump liquid inlet pipeline filtering device, which eliminates the drawbacks of frequent filter blockage and frequent damage to the hydraulic pump caused by the previous use of hydraulic filters, improves the service life of the pump, stabilizes the pump output flow, and accurately mixes the sand, thereby solving the problems in the prior art.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a ductile iron pipe core machine resin pump liquid inlet pipeline filtering device, comprising a box body, a resin pump is arranged at the front end of the box body, a curing agent pump is arranged on one side of the resin pump, a liquid inlet is arranged on the front end surface of the box body, the resin pump and the curing agent pump are both fixedly connected to the liquid inlet through a liquid inlet pipe, a filter is arranged on the liquid inlet pipe, the filter is a Y-type flushing and slag discharge filter, the filter comprises a water supply main pipe and a filter pipe, the filter pipe is located at the lower end of the water supply main pipe, and the filter pipe is connected to the water supply main pipe, and a first filter screen and a second filter screen are respectively arranged inside the filter pipe.

[0008] Preferably, a first fixed pipe is provided on one side of the water main pipe, and a second fixed pipe is provided on the other side of the water main pipe, and both the second fixed pipe and the first fixed pipe are fixedly connected to the water main pipe via a fastening flange.

[0009] Preferably, the fastening flanges at both ends of the water supply main pipe are fixedly connected by fastening bolts, and the fastening bolts are located outside the water supply main pipe.

[0010] Preferably, a drain trough is provided below the filter tube, and the drain trough is connected to the filter tube flange.

[0011] Preferably, the mesh diameter of the first filter is 2.5 mm, and the mesh diameter of the second filter is 1 mm.

[0012] Preferably, the first fixed pipe and the second fixed pipe are both in communication with the water main pipe, and the first fixed pipe and the second fixed pipe are both provided with connecting flanges at one end away from the water main pipe.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0014] 1. The utility model discloses a ductile iron pipe core machine resin pump liquid inlet pipeline filtering device, which shortens the liquid inlet pipeline length and reduces the liquid suction resistance by moving the resin pump liquid inlet to the front of the box.

[0015] 2. The utility model is a ductile iron pipe core machine resin pump inlet pipeline filtering device, by changing the hydraulic filter into a Y-type flushing and slag removal filter. By setting two layers of filter screens, the outer layer has a mesh size of 2.5 mm, and the inner layer has a mesh size of 1 mm, the two layers of filter screens separate the slag and liquid, and ensure the cleanliness of the gear pump inlet liquid. The filtered residue can be flushed and discharged by opening the bypass ball valve, which is convenient and fast, and also saves the cost of replacing the filter element. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure in which the liquid inlet of an existing resin pump is located on the back of a box;

[0017] Figure 2 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 3 This is a schematic diagram of the filter structure of the utility model;

[0019] Figure 4 This is a schematic diagram of the internal structure of the filter of the present utility model.

[0020] In the figure: 1, box body; 2, resin pump; 3, curing agent pump; 4, filter element; 5, liquid inlet pipe; 6, filter; 7, liquid inlet; 601, water supply main pipe; 602, fastening flange; 603, fastening bolts; 604, first fixed pipe; 605, second fixed pipe; 606, filter pipe; 607, sewage tank; 6061, first filter screen; 6062, second filter screen. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1 A ductile iron pipe core machine resin pump liquid inlet pipeline filtering device comprises a box body 1, a resin pump 2 is arranged at the front end of the box body 1, a curing agent pump 3 is arranged on one side of the resin pump 2, a liquid inlet 7 is arranged on the rear end face of the box body 1, the resin pump 2 and the curing agent pump 3 are both fixedly connected to the liquid inlet 7 through a liquid inlet pipe 5, and a filter element 4 is arranged on the liquid inlet pipe 5.

[0023] In order to solve the technical problems in the prior art, such as the narrow and long oil suction pipeline, excessive liquid resistance causing suction, cavitation damage to the internal parts of the gear pump, high gear pump failure rate, short service life, and easy clogging of the filter element, please refer to Figure 2-4 , providing the following technical solutions:

[0024] In the present embodiment, a ductile iron pipe core machine resin pump liquid inlet pipeline filtering device comprises a housing 1, a resin pump 2 is arranged at the front end of the housing 1, a curing agent pump 3 is arranged on one side of the resin pump 2, a liquid inlet 7 is arranged on the front end face of the housing 1, the resin pump 2 and the curing agent pump 3 are both fixedly connected to the liquid inlet 7 through a liquid inlet pipe 5, a filter 6 is arranged on the liquid inlet pipe 5, the filter 6 is a Y-type flushing and slag discharge filter, the filter 6 comprises a water supply main pipe 601 and a filter pipe 606, the filter pipe 606 is located at the lower end of the water supply main pipe 601, and the filter pipe 606 is connected to the water supply main pipe 601, and the inside of the filter pipe 606 is respectively provided with a first filter screen 6061 and a second filter screen 6062, by moving the liquid inlet 7 of the resin pump 2 to the front of the housing 1, the length of the liquid inlet pipeline is shortened, the liquid suction resistance is reduced, and the two layers of filter screens separate the slag and liquid, thereby ensuring the cleanliness of the gear pump liquid inlet.

[0025] In this embodiment, a first fixed pipe 604 is provided on one side of the water main pipe 601 , and a second fixed pipe 605 is provided on the other side of the water main pipe 601 . Both the second fixed pipe 605 and the first fixed pipe 604 are fixedly connected to the water main pipe 601 via a fastening flange 602 .

[0026] In this embodiment, the fastening flanges 602 at both ends of the water supply pipe 601 are fixedly connected by fastening bolts 603, and the fastening bolts 603 are located outside the water supply pipe 601. The fastening bolts 603 ensure the stability of the connection between the filter 6 and the liquid inlet pipe 5.

[0027] In this embodiment, a drain trough 607 is provided below the filter tube 606 and is flange-connected to the filter tube 606. The drain trough 607 facilitates cleaning of the interior of the filter tube 606, reduces accumulation of impurities on the filter tube 606, and prolongs the cleaning time interval of the filter tube 606.

[0028] The first fixed pipe 604 and the second fixed pipe 605 are both connected to the water supply pipe 601 . The first fixed pipe 604 and the second fixed pipe 605 are both provided with connecting flanges at one end away from the water supply pipe 601 for connecting to the liquid inlet pipe 5 .

[0029] The mesh diameter of the first filter 6061 is 2.5 mm, and the mesh diameter of the second filter 6062 is 1 mm. By setting two layers of filter screens, the outer layer has a 2.5 mm mesh, and the inner layer has a 1 mm mesh, the meshes with different apertures separate the slag and liquid, thereby ensuring the cleanliness of the gear pump inlet liquid.

[0030] Working principle: When in use, the resin pump 2 extracts the resin in the box 1 according to the flow rate, and passes through the Y-type flushing and slag discharge filter 6 to separate the slag and liquid, thereby ensuring the cleanliness of the liquid entering the resin pump 2. The extracted resin is mixed with the molding sand in a certain proportion to form a sand core material, which is injected into the core box, and then triethylamine is blown in to solidify the core sand, thereby obtaining a sand core with a smooth surface and precise size.

[0031] In summary, the resin pump 2 of the present invention has low failure rate and long service life, saves maintenance costs and greatly saves the maintenance cost and replacement cost of the filter element 4, and the slag discharge is simple and fast, which improves the working efficiency of the core making machine and the stability of the resin ratio.

[0032] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A ductile iron pipe core machine resin pump liquid inlet pipeline filtering device, comprising a housing (1), characterized in that: A resin pump (2) is arranged at the front end of the housing (1), a curing agent pump (3) is arranged on one side of the resin pump (2), a liquid inlet (7) is arranged at the front end surface of the housing (1), the resin pump (2) and the curing agent pump (3) are both fixedly connected to the liquid inlet (7) via a liquid inlet pipe (5), a filter (6) is arranged on the liquid inlet pipe (5), the filter (6) is a Y-type flushing and slag removal filter, the filter (6) comprises a water supply main pipe (601) and a filter pipe (606), the filter pipe (606) is located at the lower end of the water supply main pipe (601), and the filter pipe (606) is connected to the water supply main pipe (601), and a first filter screen (6061) and a second filter screen (6062) are arranged inside the filter pipe (606), respectively.

2. The ductile iron pipe core machine resin pump liquid inlet pipeline filtering device according to claim 1, characterized in that: A first fixed pipe (604) is provided on one side of the water delivery main pipe (601), and a second fixed pipe (605) is provided on the other side of the water delivery main pipe (601). The second fixed pipe (605) and the first fixed pipe (604) are both fixedly connected to the water delivery main pipe (601) via a fastening flange (602).

3. The ductile iron pipe core machine resin pump inlet pipeline filtering device according to claim 1, characterized in that: The fastening flanges (602) at both ends of the water delivery main pipe (601) are fixedly connected by fastening bolts (603), and the fastening bolts (603) are located outside the water delivery main pipe (601).

4. The ductile iron pipe core machine resin pump inlet pipeline filtering device according to claim 1, characterized in that: A sewage trough (607) is provided below the filter tube (606), and the sewage trough (607) is flange-connected to the filter tube (606).

5. The ductile iron pipe core machine resin pump inlet pipeline filtering device according to claim 1, characterized in that: The mesh diameter of the first filter (6061) is 2.5 mm, and the mesh diameter of the second filter (6062) is 1 mm.

6. The ductile iron pipe core machine resin pump inlet pipeline filtering device according to claim 2, characterized in that: The first fixed pipe (604) and the second fixed pipe (605) are both in communication with the main water pipe (601), and the first fixed pipe (604) and the second fixed pipe (605) are both provided with connection flanges at their ends away from the main water pipe (601).

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