Metering pump head

Abstract

The utility model discloses a metering pump head which comprises a pump body, threaded holes are formed in the upper end and the lower end of the pump body, a step is arranged at the starting end of each threaded hole, an annular groove is formed in the surface of each step, a sealing ring is arranged in each annular groove, the bottom end of each threaded hole is connected with a first oil hole, and each first oil hole is located in the pump body. The pump body is provided with a first oil hole, the first oil hole is communicated with the threaded hole, the bottom end of the first oil hole is connected with second oil holes which are symmetrically arranged, grooves are formed in the opposite sides of the pump body, the grooves are communicated with the corresponding second oil holes, the grooves are provided with oil seal covers, and through holes used for installation are evenly distributed in the outer ring of the pump body. The double-face oil filling device is simple in structure and convenient to install, lubricating oil is convenient to fill, meanwhile, a double-face filling mode, the first oil hole with the large space and the threaded hole are adopted, a larger oil storage space can be provided, the filling frequency is reduced, the situation of lack of lubricating oil is greatly reduced, and therefore the service life is prolonged, and the maintenance cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of metering pumps, in particular to a pump head of a metering pump. Background Art

[0002] The electromagnetic metering pump uses an electromagnetic push rod to drive the diaphragm to reciprocate in the pump head, causing changes in the volume and pressure of the pump head cavity. The change in pressure causes the opening and closing of the suction valve and the discharge valve to achieve quantitative suction and discharge of liquid. The electromagnetic metering pump is driven by an electromagnet and is designed for conveying small flow and low pressure pipeline liquids. It is popular in the industry for its simple structure, low energy consumption, accurate metering and convenient adjustment. Its design principle is "simple and practical", but its disadvantage is that the metering flow is small (commonly <90 liters per hour) and the pipeline pressure requirement is relatively low, which also limits its industrial application in some aspects. The existing electromagnetic metering pump head is inconvenient to install and add lubricating oil. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a metering pump head. The utility model has a simple structure, is easy to install, and is easy to fill with lubricating oil. At the same time, a double-sided filling method and a large-space first oil hole and a threaded hole are adopted, which can provide a larger oil storage space, reduce the number of filling times, and greatly reduce the lack of lubricating oil, thereby increasing the service life and reducing the maintenance cost; and the positioning protrusion is used in conjunction with the pump head to facilitate the accurate installation of the pump body.

[0004] The purpose of the utility model is achieved through the following technical solutions: a metering pump head, including a pump body, threaded holes are opened at the upper and lower ends of the pump body, a step is provided at the starting end of the threaded hole, a ring groove is provided on the surface of the step, a sealing ring is provided in the ring groove, the bottom end of the threaded hole is connected to a first oil hole, the first oil hole is located inside the pump body, the first oil hole is connected to the threaded hole, the bottom end of the first oil hole is connected to a symmetrically arranged second oil hole, grooves are provided on opposite sides of the pump body, the grooves are connected to the corresponding second oil holes, and the grooves are provided with oil sealing covers, and the outer ring of the pump body is evenly distributed with through holes for installation.

[0005] In one preferred embodiment, a filter screen is provided at the connection point between the groove and the second oil hole.

[0006] In one preferred embodiment, the through hole is a stepped hole.

[0007] In one preferred embodiment, a positioning protrusion is provided on one side of the pump body, and the side where the positioning protrusion is provided is perpendicular to the side where the groove is provided.

[0008] The beneficial effects of the utility model are as follows: the utility model has a simple structure, is easy to install, and is easy to fill with lubricating oil. At the same time, it adopts a double-sided filling method, as well as a large-space first oil hole and a threaded hole, which can provide a larger oil storage space, reduce the number of filling times, and greatly reduce the situation of lack of lubricating oil, thereby increasing the service life and reducing the maintenance cost; and the positioning protrusion is used in conjunction with the pump head to facilitate the accurate installation of the pump body. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0010] Figure 1 This is a schematic diagram of the cross-sectional structure of the utility model;

[0011] Figure 2 for Figure 1 Enlarged structural diagram at A in the middle.

[0012] In the figure, 1-pump body, 2-threaded hole, 3-sealing ring, 4-first oil hole, 5-second oil hole, 6-groove, 7-oil seal cover. DETAILED DESCRIPTION

[0013] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0014] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0015] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0016] In the description of the present utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model.

[0017] The terms “first”, “second”, “third”, etc. are merely used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0018] The terms "parallel", "vertical", etc. do not mean that the components must be absolutely parallel or vertical, but can be slightly tilted. For example, "parallel" only means that its direction is more parallel than "vertical", and does not mean that the structure must be completely parallel, but can be slightly tilted.

[0019] The terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal, vertical or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0020] In addition, the terms "roughly" and "basically" are intended to explain that the relevant content does not require absolute precision, but can have certain deviations. For example, "roughly equal" does not only mean absolute equality. Since it is difficult to achieve absolute "equality" in actual production and operation, there are generally certain deviations. Therefore, in addition to absolute equality, "roughly equal" also includes the above-mentioned situation with certain deviations. Taking this as an example, in other cases, unless otherwise specified, the terms "roughly" and "basically" have similar meanings to the above.

[0021] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] See also Figure 1 and Figure 2The utility model provides a technical solution: a metering pump head, including a pump body 1, the pump body 1 has threaded holes 2 at both ends, the starting end of the threaded hole 2 is provided with a step, the surface of the step is provided with an annular groove, a sealing ring 3 is provided in the annular groove, the bottom end of the threaded hole 2 is connected with a first oil hole 4, the first oil hole 4 is located inside the pump body 1, the first oil hole 4 is connected with the threaded hole 2, the bottom end of the first oil hole 4 is connected with a symmetrically arranged second oil hole 5, the opposite sides of the pump body 1 are provided with grooves 6, the grooves 6 are connected with the corresponding second oil holes 5, and the grooves 6 are provided with oil seals 7, and the outer ring of the pump body 1 is uniformly provided with through holes for installation. The utility model has a simple structure, is easy to install, and is easy to fill with lubricating oil. At the same time, the double-sided filling method, as well as the large space of the first oil hole 4 and the threaded hole 2, can provide a larger oil storage space, reduce the number of fillings, and greatly reduce the lack of lubricating oil, thereby increasing the service life and reducing the maintenance cost; and then the positioning convex block is used to cooperate with the pump head to facilitate the accurate installation of the pump body 1.

[0023] Preferably, a filter screen is provided at the connection point between the groove 6 and the second oil hole 5, so as to effectively filter impurities in the oil.

[0024] Preferably, the through hole is a stepped hole.

[0025] Preferably, a positioning protrusion is provided on one side of the pump body 1, and the side where the positioning protrusion is provided is perpendicular to the side where the groove 6 is provided, so as to facilitate accurate installation of the pump body 1.

[0026] The above is only a preferred embodiment of the utility model. It should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the technology and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.

Claims

1. A metering pump head, characterized in that: It includes a pump body, which has threaded holes at the upper and lower ends, a step at the starting end of the threaded hole, an annular groove on the surface of the step, a sealing ring in the annular groove, a first oil hole connected to the bottom end of the threaded hole, the first oil hole is located inside the pump body, the first oil hole is connected to the threaded hole, the bottom end of the first oil hole is connected to a symmetrically arranged second oil hole, grooves are arranged on opposite sides of the pump body, the grooves are connected to the corresponding second oil holes, and the grooves are equipped with oil sealing covers, and the outer ring of the pump body is evenly distributed with through holes for installation.

2. The metering pump head according to claim 1, characterized in that: A filter screen is provided at the connection point between the groove and the second oil hole.

3. The metering pump head according to claim 1, characterized in that: The through hole is a stepped hole.

4. The metering pump head according to claim 1, characterized in that: A positioning protrusion is provided on one side of the pump body, and the side where the positioning protrusion is provided is perpendicular to the side where the groove is provided.

Images