A superimposed flat spring check valve

Abstract

The utility model discloses a superimposed flat spring non-return valve, which is formed by superimposing two non-return valves with the valve body itself as a connecting body, and forming a double-layer valve body. The upper and lower valve cores are connected in series as a whole. Under the condition that the two valve bodies are connected by bolts with good sealing performance, a guide valve plate bottom plate and a lower valve core guide tube are added, and the guide valve plate bottom plate is connected with the valve plate at the bottom of the upper valve core, so that the guide valve plate bottom plate and the upper valve core become a firm whole; and the lower valve core guide tube is connected with both the lower valve core push rod and the guide valve plate bottom plate, and the upper valve core and the lower valve core are cleverly connected as a whole through the connection of the valve plate at the bottom of the upper valve core, the guide valve plate bottom plate and the lower valve core guide tube in sequence, so as to realize the superposition of the valves.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic system components and relates to a superimposed one-way valve. Background Art

[0002] The working principle of the stacking valve is exactly the same as that of the ordinary hydraulic valve, but each has its own characteristics in the specific structure and connection method, so it forms its own series. In the system, each stacking valve not only plays the function of a control element, but also acts as a channel body. The stacking valves of the same diameter, including various pressure valves, flow valves, directional valves, etc., form a series. The oil port position, screw hole position, and connection size of various valves in the same series are the same. As long as the valves are stacked in a certain order, various typical hydraulic systems can be formed. Hydraulic systems composed of stacking valves, such as injection molding machine hydraulic systems, CNC machine tool hydraulic systems, filter press feed systems, etc., are widely used in various industries.

[0003] The one-way valve of the existing filter press feeding system is a split structure, one front and one rear distributed on both sides of the plunger pump body, which occupies a large area and has low space utilization. The system has a high probability of material leakage when feeding the filter press, which is inconvenient for daily inspection and maintenance and increases the labor intensity of workers. Utility Model Content

[0004] The purpose of the utility model is to overcome the above defects, solve the corresponding technical problems, and provide a superimposed flat spring one-way valve, with the valve body itself as a connector, the upper and lower valve cores connected in series, and the lower valve core using the upper valve core to complete the guidance.

[0005] The technical solution adopted by the utility model to solve the above-mentioned technical problems is: a superimposed flat spring one-way valve, characterized in that the front and rear valve bodies are superimposed and moved to the front of the pump body, and the upper and lower valve cores are connected in series using guide members, and the push rods of the upper and lower valve cores are connected using a guide valve plate bottom plate and a lower valve core guide tube.

[0006] Furthermore, a superimposed flat spring one-way valve is provided. On the basis of the original two one-way valves, valve bodies are superimposed to form a unified integral valve, and the valves are no longer scattered; secondly, the upper and lower valve cores are connected in series as a whole. When the two valve bodies are connected by bolts with good sealing performance, the original structure of the valve is not changed, and a guide valve plate bottom plate and a lower valve core guide tube are added. The guide valve plate bottom plate and the bottom valve plate of the upper valve core are connected, so that the guide valve plate bottom plate and the upper valve core become a solid whole; and the lower valve core guide tube is connected to both the lower valve core push rod and the guide valve plate bottom plate. The bottom valve plate of the upper valve core, the guide valve plate bottom plate, and the lower valve core guide tube are connected in sequence, so that the upper valve core and the lower valve core are cleverly connected as a whole, thereby realizing the superposition of valves.

[0007] The utility model provides a flat spring one-way valve, which has the advantages of compact structure, flexible design, reduced system leakage probability, convenient maintenance and improved enterprise production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 The utility model is a schematic diagram of the cross-sectional structure of a superimposed flat spring one-way valve.

[0009] Figure 2 This is the general assembly diagram of a superimposed flat spring one-way valve of the utility model.

[0010] Figure numerals: 1-feed pipe, 2-lower valve body, 3-lower valve core, 4-pump body connecting flange, 5-guide member, 6-upper valve core, 7-upper valve body, 8-valve cover, 9-valve rod, 10-spring, 11-discharge port, 51-guide valve plate bottom plate, 52-lower valve core guide tube. Specific implementation plan

[0011] The following is a description of the technical solution in the embodiment of the utility model in conjunction with the drawings in the embodiment of the superimposed flat spring one-way valve of the utility model. The described embodiment is only a part of the preferred embodiments of the utility model, not all embodiments. Based on the embodiment of the utility model, all other embodiments without creativity made by those skilled in the art belong to the protection scope of the utility model. Example

[0012] A superimposed flat spring one-way valve is composed of two one-way valves superimposed with the valve body itself as a connecting body to form a double-layer valve body. The centers of the two valve bodies are in a straight line. The upper valve core 6 and the lower valve core 3 are connected by a guide member 5, and the guide member is composed of a guide valve plate bottom plate 51 and a lower valve core guide tube 52; the entire double-layer one-way valve is composed of a lower valve body 2, a lower valve core 3, an upper valve body 7, an upper valve core 6, a guide member 5, a valve cover 8, a valve rod 9, a feed pipeline 1, a discharge port 11 and a pump body connecting flange 4. The lower valve core 3 is fixed in the lower valve body 2, and the upper valve core 6 is fixed inside the upper valve body. The two valve bodies are superimposed up and down to form a double-layer valve body, and the key to keeping the two coaxial is the guide member 5, which connects the upper and lower valve cores in series.

[0013] When feeding, the plunger connected to the pump body connecting flange 4 is lifted up, and negative pressure is generated in the inner cavity of the lower valve body. The material enters from the feed pipe 1. At the same time, the negative pressure sucks the upper valve core spring up and compresses the spring 10; when the plunger rises to the right position and presses down, the feed check valve is pressed dead, the discharge check valve opens, the spring rebounds, and the material is discharged. As the spring rebounds, the upper and lower valve cores fall down by their own weight, and the plunger resumes to rise again, and performs the next repeated action, and operates reciprocatingly in sequence.

Claims

1. A superimposed flat spring check valve, characterized in that: The front and rear valve bodies are superimposed, and the valve cores of the two valve bodies are in a straight line. The upper and lower valve cores are connected in series into one by a guide member. The guide member includes a guide valve plate bottom plate and a lower valve core guide tube. The guide valve plate bottom plate is connected to the bottom valve plate of the upper valve core, so that the guide valve plate bottom plate and the upper valve core become a solid whole; the lower valve core guide tube is connected to both the lower valve core push rod and the guide valve plate bottom plate, and the upper valve core and the lower valve core are connected in sequence through the bottom valve plate of the upper valve core, the guide valve plate bottom plate, and the lower valve core guide tube, so that the upper valve core and the lower valve core are connected into a whole, thereby realizing the superposition of the valves.

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