Compact plastic connecting block

Abstract

The invention relates to a compact plastic connecting block which comprises a lining plate and a plastic-coated shell, the lining plate comprises a main body, a large through hole, a first screw hole, a second screw hole and a fixing hole. The plastic-coated shell wraps the surface of the lining plate through a plastic coating process, and comprises a shell body, a small through hole formed in the shell body, at least four first open holes formed in the four corner positions of the shell body respectively, and at least four second open holes formed in one sides of the four first open holes respectively; and the cavity is formed in the shell. According to the compact plastic connecting block, an original I-shaped connecting block is changed into the linear connecting block, the connecting strength between the diaphragm pump and the upper cover is guaranteed, meanwhile, the size of the plastic connecting block is reduced, and the occupied space of a pump body is effectively reduced. The small through holes serve as internal flow channels, flowing liquid is isolated from the lining plate, the lining plate is prevented from being corroded and rusted, and therefore the service life of the connecting block is prolonged.

Description

Technical Field

[0001] This invention relates to the field of diaphragm pump assembly technology, and in particular to a compact plastic connecting block. Background Technology

[0002] A diaphragm pump is a positive displacement pump that transports liquids by changing the volume of its working chamber through the reciprocating deformation of a diaphragm. It is primarily used in chemical, ceramic, and wastewater treatment industries. The diaphragm pump cover is a crucial component of the pump body, forming a sealed chamber with the diaphragm to prevent leakage. Therefore, the connection between the diaphragm pump cover and the diaphragm is extremely important. Figure 4 As shown, currently, the connection between the diaphragm pump cover and the diaphragm pump is mostly achieved using... Figure 4 The I-shaped connecting block is used for connection. This connecting block can be connected and fixed to the diaphragm pump cover and the diaphragm pump respectively through the screw holes on the two end plates, while the through hole in the middle is used for the passage of liquid medium. However, the current connecting block is not only large in size, increasing the center of gravity of the pump body and increasing the space occupied by the pump body, but also has low structural strength, resulting in unstable structural strength at the connection of the pump body. Summary of the Invention

[0003] In view of this, the present invention provides a compact plastic connecting block to solve the above problems.

[0004] A compact plastic connector includes a liner and a plastic-coated shell surrounding the liner. The liner includes a main body, a large through-hole in the middle section of the main body, at least four first screw holes at the four corners of the main body, at least four second screw holes on one side of each of the four first screw holes, and a plurality of fixing holes spaced around one side of the through-hole. The plastic-coated shell is wrapped around the surface of the liner using a plastic coating process. The plastic-coated shell includes a housing, a small through-hole in the housing, at least four first openings at the four corners of the housing, at least four second openings on one side of each of the four first openings, and a cavity inside the housing. The diameter of the small through-hole is smaller than the diameter of the large through-hole, the diameter of the first openings is larger than the diameter of the first screw holes, and the diameter of the second openings is larger than the diameter of the second screw holes.

[0005] Furthermore, the main body is housed within the cavity, and its surface is in close contact with the surface of the cavity.

[0006] Furthermore, a plurality of fixing posts are respectively provided in the cavity at the positions corresponding to the plurality of fixing holes.

[0007] Furthermore, the fixing post is inserted into the fixing hole, and the outer circumferential wall of the fixing post is in close contact with the inner circumferential wall of the fixing hole.

[0008] Furthermore, a circular groove is formed on both sides of the housing, the center of the circular groove is the same as the center of the small through hole, and is arranged around the outside of the small through hole.

[0009] Furthermore, multiple grooves are provided on both sides of the housing to reduce its own weight.

[0010] Compared with existing technologies, the compact plastic connecting block provided by this invention replaces the original I-shaped connecting block with a straight-line plastic connecting block. While ensuring the connection strength between the diaphragm pump and the diaphragm pump cover, it also reduces the volume of the plastic connecting block, effectively reducing the space occupied by the pump body. The plastic shell can further reduce the weight of the compact plastic connecting block itself, thereby lowering the center of gravity of the pump body and improving the overall stability of the pump body. The liner can strengthen the structural strength of the compact plastic connecting block and improve its tensile and shear resistance. The small through hole serves as an internal flow channel, isolating the flowing liquid from the liner to prevent corrosion and rust, thereby improving the service life of the connecting block. The countersunk hole formed by the first and second screw holes allows the compact plastic connecting block to be pre-fastened to one part using countersunk screws and nuts, and then another part can be directly fixed with screws, thus simplifying the assembly steps and improving assembly efficiency. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of the compact plastic connecting block provided by the present invention.

[0012] Figure 2 for Figure 1 A schematic diagram of the liner plate of the compact plastic connecting block.

[0013] Figure 3 for Figure 1 A cross-sectional schematic diagram of the plastic-coated shell of the compact plastic connector block.

[0014] Figure 4 This is a schematic diagram of the structure of an I-shaped connecting block in the prior art.

[0015] Reference numerals: liner 10, main body 11, large through hole 12, first screw hole 13, second screw hole 14, fixing hole 15, plastic shell 20, shell 21, small through hole 22, first opening 23, second opening 24, chamber 25, fixing post 26, circular groove 27, groove 28. Detailed Implementation

[0016] The following provides a more detailed description of specific embodiments of the present invention. It should be understood that the description of the embodiments of the present invention herein is not intended to limit the scope of protection of the present invention.

[0017] like Figure 1 The diagram shows a structural schematic of the compact plastic connecting block provided by the present invention. The compact plastic connecting block includes a liner 10 and a plastic-coated shell 20 that surrounds the liner 10. It is conceivable that the compact plastic connecting block also includes other functional modules, such as the plastic coating process, a diaphragm pump, a diaphragm pump cover, etc., which are technologies known to those skilled in the art and will not be described in detail here.

[0018] It should be noted that the compact plastic connecting block is used to connect the elbow (not shown) on the diaphragm pump cover to the column (not shown) on the diaphragm pump, so as to strengthen the connection between the two and improve the stability of the product.

[0019] The liner 10 includes a main body 11, a large through hole 12 in the middle section of the main body 11, at least four first screw holes 13 respectively opened at the four corners of the main body 11, at least four second screw holes 14 respectively opened on one side of the four first screw holes 13, and a plurality of fixing holes 15 opened around and spaced on one side of the through hole 12.

[0020] The main body 11 can be a steel plate with certain tensile and shear strength to improve the connection strength between the elbow and the column. The four corners of the main body 11 can be set according to the shape of the column to match the column.

[0021] The first screw hole 13 is fixedly connected to the column by a screw, and the second screw hole 14 is fixedly connected to the elbow by a screw. The fixing hole 15 can strengthen the connection between the liner 10 and the plastic shell 20, thereby improving the structural strength of the plastic connecting block.

[0022] The plastic-coated shell 20 is a plastic layer wrapped on the surface of the liner 10 by a plastic coating process. It includes a shell 21, a small through hole 22 opened on the shell 21, at least four first openings 23 respectively opened at the four corners of the shell 21, at least four second openings 24 respectively opened on one side of the four first openings 23, and a cavity 25 opened inside the shell 12.

[0023] The housing 21 completely encloses the surface of the body 11, the body 11 is housed in the chamber 25, and its surface is in close contact with the surface of the chamber 25.

[0024] The diameter of the small through hole 22 is smaller than that of the large through hole 12. When the compact plastic connecting block is installed between the column and the elbow, the small through hole 22 serves as an internal flow channel, isolating the flowing liquid from the liner 10 to prevent the liner 10 from corroding and rusting.

[0025] The diameter of the first opening 23 is larger than the diameter of the first screw hole 13, and the diameter of the second opening 24 is larger than the diameter of the second screw hole 14. This allows the ends of the first and second screw holes 13 and 14 to be exposed, forming a countersunk hole. During installation, countersunk screws are first used to install the compact plastic connecting block onto the diaphragm pump column through the first screw hole 13, the first opening 23, and the diaphragm pump column, using nuts to ensure the flatness of the surface of the housing 21 away from the column. Then, screws are used to tighten the diaphragm pump cover onto the compact plastic connecting block through the second opening 24 and into the second screw hole 14, thus fixing the diaphragm pump and the diaphragm pump cover together. This simplifies the assembly process and improves assembly efficiency. It is conceivable that the diaphragm pump column and the elbow of the diaphragm pump cover have through holes corresponding to the positions of the first and second screw holes 13 and 14 to allow screws to pass through.

[0026] Multiple fixing posts 26 are respectively arranged in the chamber 25 at positions corresponding to the multiple fixing holes 15. The fixing posts 26 pass through the fixing holes 15, and the outer circumferential wall of the fixing post 26 is in close contact with the inner circumferential wall of the fixing hole 15. The multiple fixing posts 26 arranged in a circumferential manner, together with the multiple fixing holes 15 arranged in a circumferential manner, enhance the structural strength between the liner 10 and the plastic-coated shell 20, so as to prevent relative displacement between the liner 10 and the plastic-coated shell 20 due to incomplete plastic coating process.

[0027] A circular groove 27 is formed on both sides of the housing 21. The center of the circular groove 27 is the same as the center of the small through hole 22 and is arranged around the outside of the small through hole 22. Since the small through hole 22 serves as an internal flow channel, even if the liquid flowing through it flows into the surface of the compact plastic connecting block, it will be blocked by the rubber ring, thereby improving the sealing between the plastic connecting block and the parts.

[0028] The shell 21 also has multiple grooves 28 on both sides to reduce its own weight.

[0029] Compared with existing technologies, the compact plastic connecting block provided by this invention replaces the original I-shaped connecting block with a straight-line plastic connecting block. While ensuring the connection strength between the diaphragm pump and the diaphragm pump cover, it also reduces the volume of the plastic connecting block, effectively reducing the space occupied by the pump body. The plastic shell 20 can further reduce the weight of the compact plastic connecting block, thereby lowering the center of gravity of the pump body and improving the overall stability of the pump body. The liner 10 can strengthen the structural strength of the compact plastic connecting block and improve its tensile and shear resistance. The small through hole 22 serves as an internal flow channel, isolating the flowing liquid from the liner 10 to prevent the liner 10 from corroding and rusting, thereby improving the service life of the connecting block. The countersunk hole formed by the first and second screw holes 13, 14 and the first and second screw holes 23, 24 allows the compact plastic connecting block to be pre-fastened to one part by the cooperation of countersunk screws and nuts, and then another part can be directly fixed by screws, thereby simplifying the assembly steps and improving assembly efficiency.

[0030] The above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions or improvements within the spirit of the present invention are covered within the scope of the claims of the present invention.

Claims

1. A compact plastic connecting block, characterized in that: The compact plastic connecting block includes a liner and a plastic-coated shell surrounding the liner. The liner includes a main body, a large through hole in the middle section of the main body, at least four first screw holes at the four corners of the main body, at least four second screw holes on one side of the four first screw holes, and a plurality of fixing holes spaced around one side of the through hole. The plastic-coated shell is wrapped around the surface of the liner using a plastic coating process. The plastic-coated shell includes a housing, a small through hole in the housing, at least four first openings at the four corners of the housing, at least four second openings on one side of the four first openings, and a cavity inside the housing. The diameter of the small through hole is smaller than the diameter of the large through hole, the diameter of the first opening is larger than the diameter of the first screw hole, and the diameter of the second opening is larger than the diameter of the second screw hole.

2. The compact plastic connecting block according to claim 1, characterized in that: The main body is housed within the cavity, and its surface is in close contact with the surface of the cavity.

3. The compact plastic connecting block according to claim 1, characterized in that: The cavity is provided with a plurality of fixing posts at the positions corresponding to the plurality of fixing holes.

4. The compact plastic connecting block according to claim 3, characterized in that: The fixing post is inserted into the fixing hole, and the outer circumferential wall of the fixing post is in close contact with the inner circumferential wall of the fixing hole.

5. The compact plastic connecting block according to claim 1, characterized in that: A circular groove is formed on both sides of the housing, the center of the groove is the same as the center of the small through hole, and it is arranged around the outside of the small through hole.

6. The compact plastic connecting block according to claim 1, characterized in that: The shell also has multiple grooves on both sides to reduce its own weight.

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