Multi-section diaphragm pump guide rod structure

Abstract

The utility model discloses a multi-section diaphragm pump guide rod structure, which comprises a guide rod sleeve, a middle guide rod and a front guide rod which have the same section size and are coaxially connected, one end of the middle guide rod is coaxially provided with a screw rod, the other end of the middle guide rod is coaxially provided with a connecting rod, the guide rod sleeve is fixedly sleeved on the connecting rod, one end of the front guide rod is coaxially provided with a screw hole, and the other end of the front guide rod is fixedly sleeved on the connecting rod. The front guide rod is sleeved on the screw rod through the screw hole in a screw-thread fit manner; wherein one end, close to the middle guide rod, of the guide rod sleeve is provided with a containing groove, and a magnetic ring is embedded in the containing groove. According to the utility model, a multi-section structure is adopted, the universal guide rod sleeve and the middle guide rod are made of non-magnetic steel, and the replaceable front guide rod is made of carbon steel, so that the cost of the guide rod is reduced, the processing manufacturability is good, the processing difficulty is reduced, the weight is light, the bending resistance is good, the service life of the guide rod is prolonged, the cost of spare parts of users is reduced, the universality is better, and standardization is easy to realize.

Description

Technical Field

[0001] The utility model relates to the technical field of diaphragm pump guide rods, and in particular to a multi-section diaphragm pump guide rod structure. Background Art

[0002] During the operation of the diaphragm pump, the guide rod provides guidance for the movement of the diaphragm. A magnetic ring is installed on the guide rod. The electromagnetic oil replenishment and discharge system determines the position of the guide rod magnetic ring to issue the oil replenishment and discharge command. This requires that the guide rod material on both sides of the guide rod magnetic ring be made of non-magnetic steel to avoid signal interference. However, the hydraulic pipe and diaphragm chamber of large diaphragm pumps are relatively large. When the electromagnetic oil replenishment and discharge system is used, the required length of the guide rod becomes longer accordingly. If all non-magnetic steel is used for processing, not only will the processing be difficult, but the cost will also be relatively high. At the same time, the demand for large-flow and high-pressure diaphragm pumps in the current diaphragm pump market is increasing, and it has gradually become the choice trend of diaphragm pumps. Therefore, it is imperative to develop a diaphragm pump guide rod with low processing difficulty and low cost. Utility Model Content

[0003] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a multi-section diaphragm pump guide rod structure to solve the problems of high difficulty and high cost in machining the diaphragm pump guide rod in the prior art.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is as follows: a multi-stage diaphragm pump guide rod structure, including a guide rod sleeve, an intermediate guide rod and a front guide rod with the same cross-sectional size and coaxially connected, one end of the intermediate guide rod is coaxially provided with a screw rod, and the other end is coaxially provided with a connecting rod, the guide rod sleeve is fixedly sleeved on the connecting rod, one end of the front guide rod is coaxially provided with a screw hole, and the front guide rod is threadedly sleeved on the screw rod through the screw hole; wherein, the guide rod sleeve is provided with a receiving groove at one end close to the intermediate guide rod, and a magnetic ring is embedded in the receiving groove, and the magnetic ring is sleeved on the connecting rod with the guide rod sleeve, and the end face of the guide rod sleeve is in contact with the end face of the intermediate guide rod.

[0005] As an optimization, a limiting convex ring is provided in the inner hole of the guide rod sleeve, a screw hole is opened at the end of the connecting rod along its axial direction, and a locking bolt is passed through the inner hole of the limiting convex ring. The end of the locking bolt facing away from the nut passes through the inner hole of the convex ring and is threadedly connected with the screw hole of the connecting rod, and the nut fits with the side of the convex ring facing away from the connecting rod.

[0006] As an optimization, gaskets are provided on both sides of the magnetic ring.

[0007] As an optimization, a concave arc transition structure is provided at the connection between the connecting rod and the intermediate guide rod.

[0008] As an optimization, the front guide rod is a hollow structure.

[0009] As an optimization, a pin hole is radially formed on the screw rod of the middle guide rod, and a corresponding pin hole is radially formed at one end of the front guide rod corresponding to the screw hole, and a pin is fixedly inserted into the pin hole.

[0010] As an optimization, the guide rod sleeve and the middle guide rod are made of non-magnetic steel, and the front guide rod is made of 45# steel.

[0011] Compared with the prior art, the utility model has the following advantages:

[0012] 1. The multi-segment structure is adopted, which is convenient for making with non-magnetic steel. The cost of the guide rod is low, the processing performance is good, and the segmented processing reduces the processing difficulty.

[0013] 2. Through the change of the structure, most of the materials of the diaphragm guide rod can be changed from non-magnetic steel to carbon steel, which not only reduces the weight of the guide rod by about 20%, reduces the tearing effect of the inertia of the guide rod generated by the high-speed reciprocating motion of the diaphragm on the diaphragm, improves the bending resistance and wear resistance of the guide rod, extends the service life of the guide rod, and reduces the spare part cost of users.

[0014] 3. The guide rod sleeve and the middle guide rod are universal. For diaphragm pumps with different specifications and flow rates, only the length of the front guide rod needs to be changed to meet the requirements, which is conducive to standardization construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the utility model;

[0016] In the figure: 1 guide rod sleeve, 2 middle guide rod, 3 front guide rod, 4 screw rod, 5 connecting rod, 6 magnetic ring, 7 locking bolt, 8 pin. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0018] In order to make the purpose, technical solution and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. Therefore, the detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the present utility model to be protected, but only represents the selected 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 fall within the protection scope of the present utility model.

[0019] It should be noted that like reference numerals and letters indicate like items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. In the description of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the figures, or the orientation or positional relationship in which the product of the invention is customarily placed when in use. It 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 should not be construed as a limitation to the present invention. In addition, terms such as "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance. In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging vertically, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined. In the description of the present invention, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "connected" 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 mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can 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 circumstances.

[0020] Example 1: Refer to Figure 1, A multi-section diaphragm pump guide rod structure, including a guide rod sleeve 1, an intermediate guide rod 2, and a front guide rod 3 with the same cross-sectional dimensions and coaxially connected. The guide rod sleeve 1 and the intermediate guide rod 2 are made of non-magnetic steel, and the front guide rod 3 is made of 45 steel. One end of the intermediate guide rod 2 is coaxially provided with a screw rod 4, and the other end is coaxially provided with a connecting rod 5. The guide rod sleeve 1 is fixedly sleeved on the connecting rod 5. One end of the front guide rod 3 is coaxially provided with a threaded hole, and the front guide rod 3 is threadedly fitted and sleeved on the screw rod 4 through this threaded hole. Specifically, a limiting convex ring is provided in the inner hole of the guide rod sleeve 1. A threaded hole is axially opened at the end of the connecting rod 5. A locking bolt 7 is passed through the inner hole of the limiting convex ring. The end of the locking bolt 7 away from the nut passes through the inner hole of the convex ring and is threadedly connected with the threaded hole of the connecting rod 5. Its nut is attached to the side of the convex ring away from the connecting rod 5 to realize the connection between the guide rod sleeve 1 and the intermediate guide rod 2. Among them, in order to ensure the fitting of the end faces of the guide rod sleeve 1 and the intermediate guide rod 2 and reduce the connection gap, the length of the connecting rod 5 is slightly less than the length of the inner hole of the convex ring of the guide rod sleeve 1 close to the intermediate guide rod 2, so that a spacing of about 1 mm is maintained between the end of the connecting rod 5 and the end face of the convex ring. Thus, after installing the locking bolt 7, the end face of the guide rod sleeve 1 can be in a tightly attached state with the end face of the intermediate guide rod 2.

[0021] Among them, a receiving groove is opened at one end of the guide rod sleeve 1 close to the intermediate guide rod 2, and a magnetic ring 6 is embedded in the receiving groove. The magnetic ring 6 is sleeved on the connecting rod 5 along with the guide rod sleeve 1, and the end face of the guide rod sleeve 1 is in contact with the end face of the intermediate guide rod 2. In this way, after the guide rod sleeve 1 and the intermediate guide rod 2 are connected, the magnetic ring 6 is hidden in the receiving groove, thus effectively protecting the magnetic ring 6 and preventing the magnetic ring 6 from being damaged. Further, gaskets are provided on both sides of the magnetic ring 6 to prevent the magnetic ring 6 from being damaged and improve the protection effect.

[0022] An inward concave arc transition structure is provided at the connection between the connecting rod 5 and the intermediate guide rod 2 to avoid stress concentration.

[0023] The front guide rod 3 is a hollow structure to reduce the overall weight of the guide rod, reduce the tearing effect of the inertia of the guide rod generated by the high-speed reciprocating motion of the diaphragm on the diaphragm, and increase the overall bending resistance of the guide rod.

[0024] In order to improve the connection stability between the intermediate guide rod 2 and the front guide rod 3, a pin hole is radially opened on the screw rod 4 of the intermediate guide rod 2, a corresponding pin hole is radially opened at one end of the front guide rod 3 corresponding to the threaded hole, and a pin 8 is fixedly passed through the pin hole to prevent the front guide rod 3 from loosening or rotating.

[0025] In summary, the utility model adopts a multi-section structure. The universal guide rod sleeve and the intermediate guide rod are made of non-magnetic steel, and the replaceable front guide rod is made of carbon steel, which reduces the cost of the guide rod, has good processing performance, reduces the processing difficulty, is light in weight, has good bending resistance, improves the service life of the guide rod, reduces the spare part cost of users, has good versatility, and is easy to achieve standardization.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model rather than to limit the technical solutions. Those of ordinary skill in the art should understand that any modifications or equivalent replacements made to the technical solutions of the utility model without departing from the purpose and scope of the technical solutions should be covered by the scope of the claims of the utility model.

Claims

1. A multi-stage diaphragm pump guide rod structure, characterized in that: It comprises a guide rod sleeve, an intermediate guide rod and a front guide rod which have the same cross-sectional dimensions and are coaxially connected. A screw rod is coaxially arranged at one end of the intermediate guide rod, and a connecting rod is coaxially arranged at the other end. The guide rod sleeve is fixedly sleeved on the connecting rod. A screw hole is coaxially arranged at one end of the front guide rod, and the front guide rod is sleeved on the screw rod through the screw hole. A receiving groove is provided at one end of the guide rod sleeve close to the intermediate guide rod, and a magnetic ring is embedded in the receiving groove. The magnetic ring is sleeved on the connecting rod along with the guide rod sleeve, and the end face of the guide rod sleeve fits with the end face of the intermediate guide rod.

2. The multi-stage diaphragm pump guide rod structure according to claim 1, wherein: A limiting convex ring is provided in the inner hole of the guide rod sleeve, a screw hole is opened at the end of the connecting rod along its axial direction, and a locking bolt is passed through the inner hole of the limiting convex ring. The end of the locking bolt facing away from the nut passes through the inner hole of the convex ring and is threadedly connected with the screw hole of the connecting rod, and the nut fits with the side of the convex ring facing away from the connecting rod.

3. A multi-stage diaphragm pump guide rod structure according to claim 1, characterized in that: Gaskets are arranged on both sides of the magnetic ring.

4. A multi-stage diaphragm pump guide rod structure according to claim 1, characterized in that: A concave arc transition structure is provided at the connection between the connecting rod and the middle guide rod.

5. A multi-stage diaphragm pump guide rod structure according to claim 1, characterized in that: The front guide rod is a hollow structure.

6. A multi-stage diaphragm pump guide rod structure according to claim 1, characterized in that: A pin hole is opened on the screw rod of the middle guide rod along its radial direction, and a corresponding pin hole is opened on one end of the front guide rod corresponding to the screw hole along its radial direction, and a pin is fixedly penetrated in the pin hole.

7. A multi - stage diaphragm pump guide rod structure according to claim 1, characterized in that: The guide rod sleeve and the middle guide rod are made of non-magnetic steel, and the front guide rod is made of No. 45 steel.

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