Sealing structure and coating pump

Abstract

The utility model belongs to the technical field of pump body sealing, and particularly relates to a sealing structure and a coating pump, the sealing structure comprises a working cavity, a sealing assembly is arranged in the working cavity, a sealing cavity is arranged in the sealing assembly, and a plurality of sealing rings are arranged in the sealing cavity; the volume rod is arranged in the sealing cavity in a sliding mode, and the side wall of the volume rod keeps the extrusion state of the sealing ring, so that a gap between the volume rod and the working cavity is sealed; in short, the sealing assembly is arranged in the working cavity, the sealing point of the volume rod and the working cavity is transferred into the sealing cavity, the sealing assembly is matched with the sealing ring in the sealing cavity to seal the gap between the volume rod and the sealing cavity, contact between the sealing ring and liquid medicine can be reduced, friction between the sealing ring and the volume rod is reduced, and therefore abrasion of the sealing ring is reduced; and the liquid medicine is not easy to pollute.

Description

Technical Field

[0001] The utility model belongs to the technical field of pump body sealing, and particularly relates to a sealing structure and a coating pump. Background Art

[0002] During the perovskite slit coating process, it is necessary to rely on a pump to supply liquid to make the coating film of the coater uniform. A seal is provided at the end of the volume rod of the existing pump. Since the seal is in direct contact with the liquid medicine, liquid is likely to accumulate at the seal, resulting in an increase in the friction force between the seal and the cavity, and the seal is easily worn and remains in the cavity, contaminating the liquid medicine and affecting the coating effect.

[0003] Therefore, how to avoid contamination of the liquid medicine is a technical problem that needs to be urgently solved in this field. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a sealing structure and a coating pump.

[0005] To solve the above technical problem, the utility model provides a sealing structure, including: a working cavity, in which a sealing component is arranged, a sealing cavity is arranged in the sealing component, and a plurality of sealing rings are arranged in the sealing cavity; a volume rod, which is slidably arranged in the sealing cavity, and the side wall of the volume rod keeps the sealing rings in a squeezed state, so that the gap between the volume rod and the working cavity is sealed.

[0006] Preferably, the sealing component includes an installation ring and a pair of abutting rings, and the through holes of the installation ring and the abutting rings are the sealing cavity; an abutting groove is formed in the inner wall of the abutting ring, and the sealing rings are arranged in the abutting groove.

[0007] Preferably, the abutting rings are mirror-image arranged on the end face of the installation ring, and the abutting groove penetrates through the end face of the abutting ring, so that the sealing rings are pressed between the abutting groove and the installation ring.

[0008] Preferably, the edge of the abutting groove near the through hole of the abutting ring is provided with an avoidance chamfer, so that when the sealing rings are squeezed by the volume rod, the sealing rings can deform towards the avoidance chamfer.

[0009] Preferably, a strengthening groove is formed in the end face of the sealing ring, and a plurality of elastic members are arranged in the strengthening groove, so that the side walls of the strengthening groove respectively push the volume rod and the abutting ring towards both sides.

[0010] Preferably, an installation counterbore is arranged in the working cavity, the sealing component is arranged in the installation counterbore, and a pressing plate is arranged at the tail end of the sealing component.

[0011] Preferably, a sealing ring is arranged on the outer wall of the sealing component, so that the gap between the sealing component and the installation counterbore is sealed.

[0012] Preferably, the volume rod is in clearance fit with the working cavity.

[0013] The present utility model also provides a coating pump, comprising: a driving mechanism; a pumping mechanism, the pumping mechanism including a working block; and any one of the above sealing structures, the working cavity being formed in the working block, one end of the working cavity being a liquid outlet, and a liquid inlet being provided on the side wall of the working cavity, the distance from the sealing assembly to the liquid outlet being greater than the distance from the sealing assembly to the liquid inlet, so that the volume rod can slide to communicate the liquid inlet with the working cavity.

[0014] Preferably, a balancing mechanism is further included, and the balancing end of the balancing mechanism and the extending end of the volume rod are connected to the moving end of the driving mechanism through a connecting member.

[0015] The beneficial effects of the present utility model are as follows:

[0016] A sealing assembly is provided in the working cavity, transferring the sealing point between the volume rod and the working cavity to the sealing cavity. Cooperating with the sealing ring in the sealing cavity, the gap between the volume rod and the sealing cavity is sealed, which can reduce the contact between the sealing ring and the liquid medicine, reduce the friction between the sealing ring and the volume rod, thereby reducing the wear of the sealing ring and preventing the liquid medicine from being easily contaminated.

[0017] Other features and advantages of the present utility model will be described in the subsequent specification, and will, in part, be obvious from the specification, or can be understood by implementing the present utility model.

[0018] To make the above objects, features, and advantages of the present utility model more obvious and understandable, the following specific preferred embodiments are given, and in conjunction with the accompanying drawings, the detailed description is as follows. Description of the Drawings

[0019] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 is a perspective view of a preferred embodiment of the coating pump of the present utility model;

[0021] Figure 2 is a front view of a preferred embodiment of the coating pump of the present utility model;

[0022] Figure 3 is Figure 2 a cross-sectional view at A in

[0023] Figure 4 is Figure 3 The enlarged view of part B in

[0024] In the figure:

[0025] 1. Pumping mechanism;

[0026] 11. Working block; 11a. Working cavity; 11b. Mounting counterbore; 11c. Pressing plate; 11d. Liquid outlet; 11e. Liquid inlet;

[0027] 12. Sealing assembly; 12a. Sealing cavity; 12b. Sealing ring; 12b1. Reinforcing groove; 12c. Mounting ring; 12d. Supporting ring; 12e. Supporting groove; 12f. Avoiding chamfer; 12g. Sealing ring;

[0028] 13. Volume rod;

[0029] 2. Driving mechanism;

[0030] 3. Balancing mechanism. Specific embodiments

[0031] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0032] As Figures 1 to 4 shown, at least one embodiment provides a sealing structure, including: a working cavity 11a, in which a sealing assembly 12 is arranged, a sealing cavity 12a is arranged in the sealing assembly 12, and a plurality of sealing rings 12b are arranged in the sealing cavity 12a; a volume rod 13, which is slidably arranged in the sealing cavity 12a, and the side wall of the volume rod 13 keeps the sealing rings 12b in a compressed state, so that the gap between the volume rod 13 and the working cavity 11a is sealed; in short, by arranging the sealing assembly 12 in the working cavity 11a, the sealing point between the volume rod 13 and the working cavity 11a is transferred to the sealing cavity 12a, and the gap between the volume rod 13 and the sealing cavity 12a is sealed by cooperating with the sealing rings 12b in the sealing cavity 12a, which can reduce the contact between the sealing rings 12b and the liquid medicine, reduce the friction between the sealing rings 12b and the volume rod 13, thereby reducing the wear of the sealing rings 12b and making the liquid medicine not easily contaminated.

[0033] In some embodiments, the sealing assembly 12 includes a mounting ring 12c and a pair of abutting rings 12d. The through holes of the mounting ring 12c and the abutting rings 12d form a sealing cavity 12a. An abutting groove 12e is formed in the inner wall of the abutting ring 12d, and the sealing ring 12b is arranged in the abutting groove 12e. Briefly speaking, the mounting ring 12c and the abutting rings 12d are annular, and their through holes form the sealing cavity 12a. The volume rod 13 is inserted into the sealing cavity 12a. By arranging the sealing ring 12b on the inner wall of the abutting ring 12d, the volume rod 13 can slide in the sealing cavity 12a in a sealed manner, reducing the residue of the liquid medicine on the sealing ring 12b.

[0034] In some embodiments, the abutting rings 12d are arranged in a mirror image on the end face of the mounting ring 12c, and the abutting groove 12e penetrates through the end face of the abutting ring 12d, so that the sealing ring 12b is pressed between the abutting groove 12e and the mounting ring 12c. Briefly speaking, the abutting rings 12d clamp the mounting ring 12c from both ends, and the abutting groove 12e penetrates through the end face of the abutting ring 12d, which can complete the clamping of the sealing member, and the structure is simple and reliable.

[0035] In some embodiments, a relief chamfer 12f is provided at the edge of the abutting groove 12e near the through hole of the abutting ring 12d, so that when the sealing ring 12b is pressed against the volume rod 13, the sealing ring 12b can deform towards the relief chamfer 12f. Briefly speaking, since the sealing ring 12b always presses against the volume rod 13, the provision of the relief chamfer 12f can provide a deformation space for the sealing ring 12b, preventing the sealing ring 12b from being damaged by extrusion.

[0036] In some embodiments, reinforcing grooves 12b1 are formed in the end face of the sealing ring 12b, and a number of elastic members are arranged in the reinforcing grooves 12b1, so that the side walls of the reinforcing grooves 12b1 respectively push the volume rod 13 and the abutting ring 12d towards both sides. Briefly speaking, by arranging elastic members to push the sealing ring 12b, the sealing performance between the volume rod 13 and the sealing cavity 12a is improved, preventing the leakage of the liquid medicine.

[0037] In some embodiments, mounting counterbores 11b are provided in the working cavity 11a, the sealing assembly 12 is arranged in the mounting counterbores 11b, and a pressing plate 11c is provided at the tail end of the sealing assembly 12. Briefly speaking, the pressing plate 11c can press the abutting ring 12d and the mounting ring 12c to complete the installation of the sealing assembly 12.

[0038] In some embodiments, a sealing ring 12g is provided on the outer wall of the sealing assembly 12 to seal the gap between the sealing assembly 12 and the mounting counterbore 11b. Briefly speaking, the sealing ring 12g can seal the gap between the sealing assembly 12 and the mounting counterbore 11b, preventing the leakage of the liquid medicine.

[0039] In some embodiments, the volume rod 13 is in clearance fit with the working chamber 11a; in short, the diameter of the volume rod 13 has a negative tolerance, and the inner diameter of the working chamber 11a has a positive tolerance, so as to reduce the friction between the volume rod 13 and the working chamber 11a and improve the service life of the volume rod 13.

[0040] At least one embodiment further provides a coating pump, including: a driving mechanism 2; a pumping mechanism 1, the pumping mechanism 1 including a working block 11; and any of the above sealing structures, the working chamber 11a is opened in the working block 11, one end of the working chamber 11a is a liquid outlet 11d, and a liquid inlet 11e is provided on the side wall of the working chamber 11a. The distance from the sealing assembly 12 to the liquid outlet 11d is greater than the distance from the sealing assembly 12 to the liquid inlet 11e, so that the volume rod 13 can slide to a position where the liquid inlet 11e communicates with the working chamber 11a; it further includes a balancing mechanism 3, and the balancing end of the balancing mechanism 3 and the extended end of the volume rod 13 are connected to the moving end of the driving mechanism 2 through a connecting member. The balancing mechanism 3 is used to balance the entire coating pump to prevent the pumping mechanism 1 from running smoothly due to unbalanced horizontal forces during the driving process of the driving mechanism 2 on the pumping mechanism 1.

[0041] In the description of the embodiments of the present invention, unless otherwise clearly defined and limited, the terms "installation", "connection", and "connection" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0042] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0043] Based on the above inspiration from the ideal embodiments of the present invention, through the above description, relevant workers can completely make various changes and modifications without departing from the technical idea of this invention. The technical scope of this invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A sealing structure, characterized in that: include: A working chamber (11a) having a sealing assembly (12) disposed therein, wherein a sealing chamber (12a) is disposed therein, and wherein a plurality of sealing rings (12b) are disposed therein; A volume rod (13) is slidably disposed in the sealing chamber (12a), and a side wall of the volume rod (13) maintains a sealing ring (12b) in an extruded state so that a gap between the volume rod (13) and the working chamber (11a) is sealed.

2. The sealing structure according to claim 1, characterized in that: The sealing assembly (12) comprises a mounting ring (12c) and a pair of supporting rings (12d), and the through holes of the mounting ring (12c) and the supporting ring (12d) are sealing cavities (12a); The inner wall of the supporting ring (12d) is provided with a supporting groove (12e), and the sealing ring (12b) is arranged in the supporting groove (12e).

3. The sealing structure according to claim 2, characterized in that: The abutting ring (12d) is mirror-imaged on the end face of the mounting ring (12c), and the abutting groove (12e) penetrates the end face of the abutting ring (12d), so that the sealing ring (12b) is pressed between the abutting groove (12e) and the mounting ring (12c).

4. The sealing structure according to claim 3, characterized in that: An edge of the supporting groove (12e) close to the through hole of the supporting ring (12d) is provided with an avoidance angle (12f), so that when the sealing ring (12b) and the volume rod (13) are squeezed, the sealing ring (12b) can be deformed towards the avoidance angle (12f).

5. The sealing structure according to claim 4, characterized in that: The end surface of the sealing ring (12b) is provided with a reinforcement groove (12b1), and a plurality of elastic members are arranged in the reinforcement groove (12b1), so that the side walls of the reinforcement groove (12b1) push the volume rod (13) and the supporting ring (12d) toward both sides respectively.

6. The sealing structure according to claim 1, characterized in that: A mounting countersunk hole (11b) is provided in the working cavity (11a), the sealing assembly (12) is provided in the mounting countersunk hole (11b), and a clamping plate (11c) is provided at the rear end of the sealing assembly (12).

7. The sealing structure according to claim 6, characterized in that: The outer wall of the sealing component (12) is provided with a sealing ring (12g) so that the gap between the sealing component (12) and the mounting countersunk hole (11b) is sealed.

8. The sealing structure according to claim 1, characterized in that: The volume rod (13) is clearance-matched with the working chamber (11a).

9. A coating pump, characterized in that: include: Driving mechanism (2); A pumping mechanism (1), the pumping mechanism (1) comprising a working block (11); And, according to the sealing structure as described in any one of claims 1 to 8, the working chamber (11a) is opened in the working block (11), one end of the working chamber (11a) is a liquid outlet (11d), and the side wall of the working chamber (11a) is provided with a liquid inlet (11e), and the distance from the sealing component (12) to the liquid outlet (11d) is greater than the distance from the sealing component (12) to the liquid inlet (11e), so that the volume rod (13) can slide to the liquid inlet (11e) and communicate with the working chamber (11a).

10. The coating pump according to claim 9, characterized in that: It also comprises a balancing mechanism (3), wherein the balancing end of the balancing mechanism (3) and the extended end of the volume rod (13) are connected to the moving end of the driving mechanism (2) via a connecting piece.

Images