Universal automatic alignment plunger connecting structure

Abstract

The utility model belongs to the field of fluid machinery, and discloses a universal automatic alignment plunger connecting structure which comprises a fixing seat, a plunger and a connecting assembly used for connecting the fixing seat and the plunger, and the connecting assembly comprises a first universal part, a second universal part and a pressing part. The second universal part comprises a first universal spherical surface part and a first universal connecting part which are connected in a matched mode, the first universal connecting part is connected with the plunger, the first universal part is located between the fixing base and the first universal spherical surface part and matched with the first universal spherical surface part through a spherical surface structure, the pressing part is connected with the fixing base, and the second universal part is located between the first universal spherical surface part and the second universal spherical surface part. And the second universal part and the first universal part are tightly pressed on the fixed seat by the pressing mechanism. The plunger is connected with the fixed seat through the first universal part, the second universal part, the pressing part and the like, and the first universal part is matched with the second universal part through the spherical surface, so that automatic centering and universal alignment are realized, and the coaxiality of the plunger is ensured.

Description

Technical Field

[0001] The utility model relates to the field of fluid machinery, in particular to a universal automatic alignment plunger connection structure. Background Art

[0002] A metering pump is a type of fluid conveying machinery, and its outstanding feature is that it can maintain a constant flow rate that is independent of the discharge pressure. The use of a metering pump can simultaneously complete the functions of conveying, metering and regulation, thereby simplifying the production process. Using multiple metering pumps, several media can be input into the process flow in an accurate proportion for mixing. Due to its own prominence, metering pumps have now been widely used in various industrial fields such as petrochemicals, pharmaceuticals, and food. A metering pump generally includes a worm gear drive mechanism, an eccentric rotary mechanism, a plunger reciprocating mechanism, and a pump head mechanism. The worm gear drive mechanism drives the eccentric rotary mechanism to move, and the eccentric wheel of the eccentric rotary mechanism drives the plunger in the plunger reciprocating mechanism to reciprocate. The plunger changes the pump chamber volume of the pump head mechanism, thereby achieving the purpose of conveying the medium.

[0003] In order to improve the pumping capacity of the metering pump, the applicant thought of using a main shaft to drive two plungers to move in and out, and the two plungers are coaxially arranged. The problem is that there may be processing and assembly errors between the plungers and the cylinder body, making it difficult to ensure the coaxiality of the two plungers.

[0004] Based on the above problems, the applicant proposes a universal automatic alignment plunger connection structure. Utility Model Content

[0005] The utility model aims to provide a universal automatic alignment plunger connection structure to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A universal automatic alignment plunger connection structure includes a fixed seat, a plunger and a connection assembly for connecting the fixed seat and the plunger, the connection assembly includes a first universal part, a second universal part and a clamping part, the second universal part includes a first universal spherical part and a first universal connecting part that are matched and connected, the first universal connecting part is connected to the plunger, the first universal part is located between the fixed seat and the first universal spherical part, the first universal part and the first universal spherical part are matched through a spherical structure, and the clamping part is connected to the fixed seat, which presses the second universal part and the first universal part onto the fixed seat.

[0008] Furthermore, the first universal member is a ball seat structure having a first concave spherical surface thereon, and the first universal spherical portion is a ball head structure having a first convex spherical surface thereon for matching with the first concave spherical surface.

[0009] Furthermore, the first universal connection portion is threadedly engaged with the plunger.

[0010] Furthermore, a fixing seat installation cavity for accommodating the first universal member and the second universal member is provided on the fixing seat.

[0011] Furthermore, the connection assembly also includes a third universal member, which is clamped between the second universal member and the pressing member, and the third universal member is matched with the second universal member through a spherical structure.

[0012] Furthermore, the third universal joint is an annular ball seat structure having a second concave spherical surface, and the first universal spherical portion is a ball head structure having a second convex spherical surface for matching with the second concave spherical surface.

[0013] Furthermore, the fixing seat and the pressing member are connected via a fastener.

[0014] Compared with the prior art, the beneficial effect of the utility model is that the plunger and the fixed seat of the utility model are connected by a first universal joint, a second universal joint, a clamping member and other structures, wherein the first universal joint and the second universal joint are matched through a spherical surface, thereby realizing automatic centering and universal alignment, and ensuring the coaxiality of the plunger. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model is a schematic diagram of the cross-sectional structure of the metering pump used in the present invention.

[0016] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0017] Figure 3 This is a schematic diagram of the structure of the first universal member in the utility model.

[0018] Figure 4 This is a schematic diagram of the structure of the second universal member in the utility model.

[0019] Figure 5 This is a schematic diagram of the structure of the third universal member in the utility model.

[0020] In the figure: the plunger 3, the fixing seat 4, the fixing seat mounting cavity 400, the first universal member 10, the first concave spherical surface 1000, the second universal member 11, the first universal spherical portion 1100, the first universal connecting portion 1101, the first convex spherical surface 1102, the second convex spherical surface 1103, the third universal member 12, the second concave spherical surface 1200, and the clamping member 13. 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-Figure 5 A universal automatic alignment plunger connection structure includes a fixed seat 4, a plunger 3 and a connection assembly for connecting the fixed seat 4 and the plunger 3. Rollers and bearings are arranged on the fixed seat 4. The rollers and bearings cooperate with the cam on the main shaft to drive the plunger 3 to reciprocate. The connection assembly includes a first universal member 10, a second universal member 11 and a clamping member 13. The second universal member 11 includes a first universal spherical portion 1100 and a first universal connecting portion 1101 that are matched and connected. The first universal connecting portion 1101 is connected to the plunger 3. The first universal member 10 is located between the fixed seat 4 and the first universal spherical portion 1100. The first universal member 10 cooperates with the first universal spherical portion 1100 through a spherical structure. The clamping member 13 is connected to the fixed seat 4, which presses the second universal member 11 and the first universal member 10 onto the fixed seat 4.

[0023] It can be understood that in the above technical solution, the plunger 3 of the utility model is connected to the fixed seat 3 through structures such as the first universal joint 10, the second universal joint 11, and the clamping member 13, wherein the first universal joint 10 and the second universal joint 11 are spherically matched to achieve automatic centering and universal alignment to ensure the coaxiality of the plunger 3.

[0024] Continue reading Figure 2 , Figure 3 , Figure 4 In one embodiment of the utility model, the first universal member 10 is a ball seat structure having a first concave spherical surface 1000 thereon, and the first universal spherical portion 1100 is a ball head structure having a first convex spherical surface 1102 thereon for cooperating with the first concave spherical surface 1000, and the first concave spherical surface 1000 and the first convex spherical surface 1102 are consistent in shape and size.

[0025] In another embodiment of the present invention, a convex spherical surface may be designed on the first universal member 10 , and a corresponding concave spherical surface may be designed on the first universal spherical portion 1100 .

[0026] Continue reading Figure 2 , Figure 4 , Figure 5In one embodiment of the utility model, the connection assembly further includes a third universal member 12, which is sandwiched between the second universal member 11 and the pressing member, and the third universal member 12 and the second universal member 11 are matched through a spherical structure. Specifically, the third universal member 12 is an annular ball seat structure, which has a second concave spherical surface 1200, and the first universal spherical portion 1100 has a second convex spherical surface 1103 for matching with the second concave spherical surface 1200, and the second concave spherical surface 1200 and the second convex spherical surface 1103 are consistent in shape and size.

[0027] In another embodiment of the present invention, the third universal member 12 may be designed with a convex spherical surface, and the first universal spherical portion 1100 may be designed with a corresponding concave spherical surface.

[0028] It can be understood that in the above technical solution, the provision of the third universal member 12 can further help the plunger to be positioned and aligned.

[0029] Continue reading Figure 2 and Figure 4 In one embodiment of the present invention, the first universal connection portion 1101 is a screw structure, which is threadedly engaged with the plunger 3 .

[0030] In another embodiment of the present invention, the first universal connection portion 1101 can be designed as a screw hole structure, and a screw rod can be designed on the plunger 3, and the screw rod is screwed into the screw hole.

[0031] Continue reading Figure 2 In one embodiment of the utility model, a fixing seat installation cavity 400 for accommodating the first universal member 10 and the second universal member 11 is provided on the fixing seat 4, and a clamping member 13 is partially inserted into the fixing seat installation cavity 400, and the inserted portion is clamped between the fixing seat installation cavity 400 and the outer wall of the plunger 3, and another portion of the clamping member 13 remains outside the fixing seat installation cavity 400 and is blocked with the end surface of the fixing seat 4, and this portion is connected to the fixing seat 4 by bolts.

[0032] It should be noted that the above-mentioned plunger 3, fixed seat 4, fixed seat mounting cavity 400, first universal member 10, first concave spherical surface 1000, second universal member 11, first universal spherical portion 1100, first universal connecting portion 1101, first convex spherical surface 1102, second convex spherical surface 1103, third universal member 12, second concave spherical surface 1200, and clamping member 13 are all coaxially arranged.

[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 universal automatic alignment plunger connection structure, characterized in that: The invention comprises a fixed seat (4), a plunger (3) and a connecting assembly for connecting the fixed seat (4) and the plunger (3), wherein the connecting assembly comprises a first universal member (10), a second universal member (11) and a pressing member (13), wherein the second universal member (11) comprises a first universal spherical portion (1100) and a first universal connecting portion (1101) which are matched and connected, wherein the first universal connecting portion (1101) is connected to the plunger (3), the first universal member (10) is located between the fixed seat (4) and the first universal spherical portion (1100), the first universal member (10) and the first universal spherical portion (1100) are matched via a spherical structure, and the pressing member (13) is connected to the fixed seat (4) and presses the second universal member (11) and the first universal member (10) onto the fixed seat (4).

2. A universal automatic alignment plunger connection structure according to claim 1, characterized in that: The first universal member (10) is a ball seat structure having a first concave spherical surface (1000) thereon, and the first universal spherical portion (1100) is a ball head structure having a first convex spherical surface (1102) thereon for matching with the first concave spherical surface (1000).

3. The universal automatic alignment plunger connection structure according to claim 1, characterized in that: The first universal connection portion (1101) is threadedly engaged with the plunger (3).

4. The universal automatic alignment plunger connection structure according to claim 1, characterized in that: The fixing seat (4) is provided with a fixing seat installation cavity (400) for accommodating the first universal member (10) and the second universal member (11).

5. The universal automatic alignment plunger connection structure according to claim 1, characterized in that: The connection assembly further comprises a third universal member (12), the third universal member (12) being sandwiched between the second universal member (11) and the pressing member, and the third universal member (12) and the second universal member (11) being matched via a spherical structure.

6. A universal automatic alignment plunger connection structure according to claim 5, characterized in that: The third universal member (12) is an annular ball seat structure having a second concave spherical surface (1200) thereon, and the first universal spherical portion (1100) is a ball head structure having a second convex spherical surface (1103) thereon for matching with the second concave spherical surface (1200).

7. The universal automatic alignment plunger connection structure according to claim 1, characterized in that: The fixing seat (4) and the pressing piece (13) are connected via a fastener.

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