High-performance metering pump plunger sealing structure

Abstract

The utility model discloses a high-performance metering pump plunger sealing structure, which relates to the field of metering pumps and comprises a sealing seat, a first extrusion sheet is mounted on the outer wall of the sealing seat, the upper end of the first extrusion sheet abuts against a first rubber ring, and the upper end of the first rubber ring abuts against a second extrusion sheet. The upper end of the second extrusion sheet abuts against a second rubber ring, and the upper end of the second rubber ring abuts against a third extrusion sheet. The sealing seat and the first rubber ring are arranged, the sealing seat is tightly attached to the first rubber ring, when the device is used, the sealing seat can be conveniently and rapidly installed, the usability of the device is improved, the plunger body and the sealing seat are arranged, the plunger body is used for fixing the sealing seat in a threaded mode, and therefore the sealing effect of the device is improved. And when the device is used, the arrangement of the plunger body facilitates extrusion adjustment of the first rubber ring, and the usability of the device is improved.

Description

Technical Field

[0001] The utility model relates to the field of metering pumps, in particular to a high-performance metering pump plunger sealing structure. Background Technique

[0002] A metering pump is also called a dosing pump or a proportional pump. A metering pump is a special positive displacement pump that can meet the needs of various strict process flows, and its flow rate can be steplessly adjusted within the range of 0-100%, and is used to transport liquids (especially corrosive liquids); a metering pump is a kind of fluid conveying machinery. Since a plunger metering pump transports the medium through the reciprocating motion of the plunger, the sealing of the plunger is particularly crucial. Therefore, a high-performance metering pump plunger sealing structure is required.

[0003] In the prior art, a patent document with the publication number of CN218816932U provides a high-performance metering pump plunger sealing structure, which relates to the technical field of the sealing structure of the hydraulic end of a metering pump. The key points of its technical solution are: including a metering pump head and a stuffing box arranged at the end of the metering pump head. A cylindrical cavity is arranged inside the stuffing box. A first rubber gasket, a second rubber gasket, a first connecting part and a second connecting part are arranged in the cavity. An elastic member is arranged between the first connecting part and the second connecting part. The second rubber gasket is arranged on one side of the second connecting part, and the first rubber gasket is arranged on one side of the first connecting part. A gland is detachably arranged at one end of the stuffing box. A pressing member is arranged between the inner surface of the gland and the second rubber gasket, and this pressing member is used to make the elastic member in a contracted state. The effect is that the metering pump has better sealing performance. However, when the technology of CN218816932U is in operation, it is not convenient to quickly replace the device parts, not convenient to adjust and tighten the worn sealing parts again, and not convenient to prevent the fixed parts from loosening. For this reason, a high-performance metering pump plunger sealing structure is urgently needed. Content of the Utility Model

[0004] Based on this, the purpose of the present utility model is to provide a high-performance metering pump plunger sealing structure to solve the problems that when the existing high-performance metering pump plunger sealing structure is in use, it is not convenient to quickly replace the device parts, not convenient to adjust and tighten the worn sealing parts again, and not convenient to prevent the fixed parts from loosening.

[0005] To achieve the above purpose, the present utility model provides the following technical solution: A high-performance metering pump plunger sealing structure includes a sealing seat. A first pressing piece is installed on the outer wall of the sealing seat. The upper end of the first pressing piece abuts against a first rubber ring. The upper end of the first rubber ring abuts against a second pressing piece. The upper end of the second pressing piece abuts against a second rubber ring. The upper end of the second rubber ring abuts against a third pressing piece.

[0006] The outer wall of the sealing seat is fixedly connected with a plunger body.

[0007] The outer wall of the plunger body is fixedly connected with a lock washer. The lower end of the lock washer abuts against a pressure sleeve, and the lower end of the pressure sleeve abuts against a limit sleeve.

[0008] Preferably, the sealing seat is movably connected with a first pressing piece, and the inner wall of the first pressing piece is designed with openings.

[0009] Preferably, the inner wall of the first rubber ring is closely attached to the outer wall of the sealing seat, and the outer wall of the first rubber ring is closely attached to the outer wall of the second pressing piece.

[0010] Preferably, the third pressing piece is movably connected with the sealing seat, and the inner wall of the third pressing piece is designed with openings.

[0011] Preferably, the plunger body is threadedly connected with the sealing seat, and the inner wall of the plunger body is provided with threads.

[0012] Preferably, the plunger body is threadedly connected with the pressure sleeve, and the outer wall of the plunger body and the inner wall of the pressure sleeve are both provided with threads.

[0013] Preferably, the limit sleeve is snap-fitted with the plunger body, and the inner diameter of the limit sleeve is larger than the outer diameter of the plunger body.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] 1. Through the sealing seat and the first rubber ring provided by the present utility model, the sealing seat plays a role of closely fitting the first rubber ring. When using the device, the sealing seat is convenient for quick installation of the sealing seat, increasing the usability of the device;

[0016] 2. Through the plunger body and the sealing seat provided by the present utility model, the plunger body plays a role of threadedly fixing the sealing seat. When using the device, the plunger body is convenient for extrusion adjustment of the first rubber ring, increasing the usability of the device;

[0017] 3. Through the limit sleeve and the plunger body provided by the present utility model, the limit sleeve plays a role of snap-fitting and fixing the plunger body. When using the device, the limit sleeve is convenient for fixing and preventing loosening of the device parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is the front view of the present utility model;

[0019] Figure 2 is the exploded structural schematic diagram of the front view of the present utility model;

[0020] Figure 3This is a schematic structural diagram of the combination of the sealing seat, the first extrusion sheet, the first rubber ring and the second extrusion sheet of the present utility model;

[0021] Figure 4 This is a schematic structural diagram of the combination of the plunger body and the limit sleeve parts of the present utility model.

[0022] In the figure: 1. Sealing seat; 2. First extrusion sheet; 3. First rubber ring; 4. Second extrusion sheet; 5. Second rubber ring; 6. Third extrusion sheet; 7. Plunger body; 8. Locking sleeve; 9. Pressing sleeve; 10. Limit sleeve. Specific embodiments

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation of the present utility model.

[0024] Next, the embodiments of the present utility model will be described according to the overall structure of the present utility model.

[0025] Please refer to Figures 1-4 , a high-performance metering pump plunger sealing structure, including a sealing seat 1. A first extrusion sheet 2 is installed on the outer wall of the sealing seat 1. The sealing seat 1 is movably connected to the first extrusion sheet 2, and the inner wall of the first extrusion sheet 2 is designed with openings. The upper end of the first extrusion sheet 2 abuts against a first rubber ring 3. The inner wall of the first rubber ring 3 is closely attached to the outer wall of the sealing seat 1, and the outer wall of the first rubber ring 3 is closely attached to the outer wall of the second extrusion sheet 4. The upper end of the first rubber ring 3 abuts against the second extrusion sheet 4. The upper end of the second extrusion sheet 4 abuts against a second rubber ring 5. The upper end of the second rubber ring 5 abuts against a third extrusion sheet 6. The third extrusion sheet 6 is movably connected to the sealing seat 1, and the inner wall of the third extrusion sheet 6 is designed with openings. By setting the sealing seat 1, it plays a role of closely fitting the first rubber ring 3. When using the device, the setting of the sealing seat 1 facilitates the quick installation of the sealing seat 1 and increases the usability of the device.

[0026] Please refer to Figures 1-4 , a high-performance metering pump plunger sealing structure, the outer wall of the sealing seat 1 is fixedly connected to a plunger body 7. The plunger body 7 is threadedly connected to the sealing seat 1, and the inner wall of the plunger body 7 is provided with threads. By setting the plunger body 7, it plays a role of threadedly fixing the sealing seat 1. When using the device, the setting of the plunger body 7 facilitates the extrusion adjustment of the first rubber ring 3 and increases the usability of the device.

[0027] Please refer to Figures 1-4, A high-performance metering pump plunger sealing structure. An anti-loosening sleeve 8 is fixedly connected to the outer wall of the plunger body 7. The lower end of the anti-loosening sleeve 8 abuts against a pressing sleeve 9. The plunger body 7 is threadedly connected to the pressing sleeve 9, and both the outer wall of the plunger body 7 and the inner wall of the pressing sleeve 9 are thread-shaped. The lower end of the pressing sleeve 9 abuts against a limiting sleeve 10. The limiting sleeve 10 is snap-fitted with the plunger body 7, and the inner diameter of the limiting sleeve 10 is larger than the outer diameter of the plunger body 7. By providing the limiting sleeve 10, it plays a role in snap-fixing the plunger body 7. When using the device, the setting of the limiting sleeve 10 facilitates the fixing, anti-detachment and anti-loosening of the device parts.

[0028] Working principle: When in use, take out the device and place it at the designated position. Then snap-fix the sealing seat 1 to the first pressing piece 2. Then put the first rubber ring 3 on the outer wall of the sealing seat 1. Then snap-fix the second pressing piece 4 to the sealing seat 1. Then put the second rubber ring 5 on the outer wall of the sealing seat 1. Then snap-fix the third pressing piece 6 to the sealing seat 1. Then thread-rotate the plunger body 7 to the sealing seat 1, press the plunger body 7 against the third pressing piece 6 to tighten the sealing seat 1. Then put the limiting sleeve 10 on the plunger body 7, snap the limiting sleeve 10 to the sealing seat 1. Then thread-fix the anti-loosening sleeve 8 to the plunger body 7. Then thread-fix the pressing sleeve 9 to the plunger body 7. Finally, fixedly connect the plunger body 7 inside the metering pump. In this way, the use process of the device is completed. The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0029] The orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of simplifying the description of the present invention, 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 thus cannot be understood as a limitation to the protection content of the present invention.

[0030] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A high-performance metering pump plunger sealing structure, comprising a sealing seat (1), characterized in that: The outer wall of the sealing seat (1) is provided with a first extrusion sheet (2), the upper end of the first extrusion sheet (2) abuts against a first rubber ring (3), the upper end of the first rubber ring (3) abuts against a second extrusion sheet (4), the upper end of the second extrusion sheet (4) abuts against a second rubber ring (5), and the upper end of the second rubber ring (5) abuts against a third extrusion sheet (6); The outer wall of the sealing seat (1) is fixedly connected with a plunger body (7); The outer wall of the plunger body (7) is fixedly connected with an anti-loosening sleeve (8), the lower end of the anti-loosening sleeve (8) abuts against a pressing sleeve (9), and the lower end of the pressing sleeve (9) abuts against a limiting sleeve (10).

2. A high performance metering pump plunger sealing structure according to claim 1, characterized in that: The sealing seat (1) is movably connected to the first extrusion sheet (2), and the inner wall of the first extrusion sheet (2) is of open-hole design.

3. A high performance metering pump plunger sealing structure according to claim 1, characterized in that: The inner wall of the first rubber ring (3) is tightly fitted with the outer wall of the sealing seat (1), and the outer wall of the first rubber ring (3) is tightly fitted with the outer wall of the second extrusion sheet (4).

4. A high performance metering pump plunger sealing structure according to claim 1, characterized in that: The third extrusion sheet (6) is movably connected to the sealing seat (1), and the inner wall of the third extrusion sheet (6) is of open-hole design.

5. A high performance metering pump plunger sealing structure according to claim 1, characterized in that: The plunger body (7) is threadedly connected to the sealing seat (1), and the inner wall of the plunger body (7) is threadedly arranged.

6. A high performance metering pump plunger sealing structure according to claim 1, characterized in that: The plunger body (7) is threadedly connected to the pressing sleeve (9), and the outer wall of the plunger body (7) and the inner wall of the pressing sleeve (9) are both threadedly arranged.

7. A high performance metering pump plunger sealing structure according to claim 1, characterized in that: The limiting sleeve (10) is snap-connected with the plunger body (7), and the inner wall diameter of the limiting sleeve (10) is greater than the outer wall diameter of the plunger body (7).

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