Reciprocating piston pump springless valve body assembly

Abstract

This utility model relates to the field of plunger pump technology, providing a springless valve body assembly for a reciprocating plunger pump, including a valve body and a valve core. The valve core consists of two sets of repulsive magnetic components and guide bolts, with the magnetic components slidably fitted onto the guide bolts. This springless design effectively reduces wear, significantly improving pump stability and service life. It also reduces installation and disassembly frequency, making it more convenient to use. The magnetic components are reusable, reducing maintenance costs and extending service life. The second magnetic component uses a planar assembly method with the valve plate, effectively reducing the risk of high-temperature deformation of the valve plate, thereby greatly improving sealing performance. Made of high-strength materials, it possesses excellent pressure resistance and corrosion resistance.

Description

Technical Field

[0001] This utility model relates to the field of plunger pump technology and provides a springless valve body assembly for a reciprocating plunger pump. Background Technology

[0002] A reciprocating piston pump is a positive displacement pump that transports liquid by the reciprocating linear motion of a piston within a pump cylinder. Its working principle is as follows: a drive mechanism (such as a motor or engine) drives the piston to reciprocate periodically, changing the volume of the pump cylinder. This creates negative pressure during the suction stroke to draw in liquid, and pressurizes the pump during the discharge stroke to discharge the liquid. Its characteristics include high output pressure and adjustable flow rate, but it suffers from flow pulsation.

[0003] A reciprocating piston pump mainly consists of the following components:

[0004] Drive mechanism: Provides power, and common forms include electric motors, internal combustion engines, or hydraulic motors.

[0005] Crankshaft / cam mechanism: converts rotary motion into reciprocating linear motion of the piston.

[0006] Piston: The core component that reciprocates within the pump cylinder, responsible for changing volume.

[0007] Pump cylinder (cylinder body): A sealed cavity that houses the plunger and works with the plunger to form the working chamber.

[0008] Suction valve and discharge valve: Both are one-way valves, controlling the direction of liquid intake and discharge.

[0009] Suction valve: Opens during the plunger's return stroke to draw in liquid.

[0010] Discharge valve: Opens when the plunger advances to discharge high-pressure liquid.

[0011] Sealing components: prevent liquid leakage, such as stuffing boxes or mechanical seals.

[0012] Springs: typically used to assist in valve closure or plunger reset.

[0013] Reciprocating piston pumps are widely used in the following scenarios due to their high-pressure output characteristics:

[0014] Industrial sector:

[0015] High-pressure cleaning equipment (such as car wash machines and industrial pipeline cleaning).

[0016] Hydraulic systems (such as injection molding machines and presses).

[0017] Petrochemical industry (water injection, grouting, chemical metering and transportation).

[0018] In the agricultural sector: pesticide spraying and irrigation systems.

[0019] Medical field: High-pressure infusion pumps (such as for CT contrast agent injection).

[0020] Energy sector: Water injection in oil fields and coalbed methane extraction.

[0021] Food processing: Quantitative delivery of high-viscosity liquids (such as jam and oil).

[0022] Springs in reciprocating piston pumps mainly perform the following key functions:

[0023] Valve control:

[0024] Auxiliary closing mechanism for suction and discharge valves: Springs provide elastic force to ensure timely valve closure when the plunger reverses direction, preventing liquid backflow.

[0025] Maintaining a tight seal: Under high pressure conditions, the spring force can enhance the fit between the valve and the valve seat, reducing leakage.

[0026] Plunger reset:

[0027] In a single-acting pump, the plunger return stroke (suction stroke) relies on the spring force to reset, without the need for external power drive (as in a double-acting pump, it resets through reverse pressure).

[0028] Buffering vibration and shock:

[0029] Springs can absorb the inertial impact during piston movement, reduce mechanical vibration and noise, and extend equipment life.

[0030] In the design of various plunger pumps, the check valve is a crucial component. Its primary function is to ensure that fluid flows in only one direction, preventing backflow or reverse flow. This is essential for maintaining stable operation and improving the efficiency of the plunger pump. By precisely controlling the flow direction, the check valve helps ensure that the plunger pump can continuously and efficiently output the required pressure and flow rate. Therefore, the selection and configuration of check valves are critical aspects that cannot be ignored in the design and manufacturing process of plunger pumps.

[0031] In traditional plunger pump valve assemblies, springs are widely used to achieve the opening and closing of the valve. Over long-term use, springs are prone to performance degradation or even damage due to factors such as fatigue, temperature, and corrosion, thus affecting the normal operating efficiency and stability of the plunger pump. Frequent spring replacements not only increase maintenance costs and downtime but also reduce the overall lifespan of the equipment. Therefore, a new technical solution is needed to address these problems. Utility Model Content

[0032] The purpose of this invention is to address the shortcomings of existing technologies by proposing a springless valve body assembly for a reciprocating plunger pump. This assembly utilizes the principle of repulsion between like magnetic poles to replace the traditional spring, thereby improving the reliability, stability, and service life of the valve body assembly and reducing maintenance costs.

[0033] To achieve the above objectives, the present invention adopts the following technical solution:

[0034] A springless valve body assembly for a reciprocating plunger pump, comprising a valve body and a valve core, characterized in that the valve core consists of two sets of repulsive magnetic components and guide bolts, wherein each magnetic component is slidably fitted onto the guide bolts. Further, the magnetic components are a magnetic sleeve and a magnetic base.

[0035] Furthermore, one end of the magnetic sliding sleeve is provided with a limiting ring platform, the bottom surface of the limiting ring platform is provided with a ring groove, and a magnet is embedded in the ring groove.

[0036] Furthermore, the top surface of the magnetic base is provided with a semi-groove, and a magnet is embedded in the semi-groove.

[0037] Furthermore, the upper part of the guide bolt is provided with an external hexagonal limiting ring platform.

[0038] Furthermore, the valve body is made of a non-magnetic metal material. Furthermore, the valve body is made of stainless steel.

[0039] Furthermore, the magnet is a samarium cobalt magnet.

[0040] The beneficial effects of this utility model are as follows:

[0041] The springless design effectively reduces wear, significantly improving pump stability and lifespan. It reduces installation and disassembly frequency, making it more convenient to use; the reusable magnet assembly lowers maintenance costs and extends service life. The second magnet assembly uses a flat-plane assembly with the valve plate, effectively reducing the risk of valve plate deformation at high temperatures, thus greatly improving sealing performance. Made of high-strength materials, it possesses excellent pressure resistance and corrosion resistance. Attached Figure Description

[0042] Figure 1 It is a schematic diagram of a three-dimensional structure;

[0043] Figure 2 This is a schematic diagram of the top view structure;

[0044] Figure 3 This is a frontal view of the structural diagram;

[0045] Figure 4 yes Figure 2 Schematic diagram of the cross-sectional structure at point AA;

[0046] In the picture:

[0047] 1. Valve body, 2. First sealing gasket, 3. Magnetic seat, 4. Second sealing gasket, 5. Magnetic sliding sleeve, 6. Guide bolt. Detailed Implementation

[0048] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0049] like Figures 1-4 A springless valve body 1 assembly for a reciprocating piston pump mainly consists of a valve body 1, a guide bolt 6, a magnetic sleeve 5, a magnetic seat 3, and a sealing ring.

[0050] The valve body 1 is a waisted column shape with flat top and bottom surfaces. A threaded hole is opened in the center of the top surface, and several axial through holes are opened around the central axis. Several axial blind holes are opened around the bottom surface near the outer wall, and several radial blind holes are opened around the waist. The number of axial blind holes and radial blind holes are the same and correspond one-to-one, and they are interconnected at the bottom.

[0051] One end of the guide bolt 6 is provided with a first limiting ring platform in the shape of an external hexagon, and the other end is threaded to a threaded hole. The top of the magnetic sliding sleeve 5 is provided with a protruding second limiting ring platform. The bottom surface of the second limiting ring platform is provided with an annular groove, and a circular magnet is embedded in the annular groove. The circular magnet is fixed by adhesive bonding and is flush with the lower end surface of the second limiting ring platform.

[0052] The top surface of the magnetic base 3 has an annular semi-groove, and a circular magnet is also embedded in the annular semi-groove. This magnet repels the magnet in the magnetic sliding sleeve 5.

[0053] Both the top and bottom surfaces of the magnetic base 3 are equipped with sealing rings, with the sealing ring on the bottom of the magnetic base 3 being a thickened design that covers the through hole on the valve body 1.

[0054] The valve body 1, magnetic sleeve 5 and magnetic base 3 are all made of non-magnetic metal materials, such as 304 and 316 stainless steel, and preferably high-strength, corrosion-resistant stainless steel 17-4.

[0055] All annular magnets are radially magnetized. Guide bolts 6 pass through axial through holes. After valve body 1, guide bolts 6, magnetic sleeves 5 and magnetic base 3 are assembled in sequence, valve body 1 and magnetic components are fastened together by guide bolts 6. Sealing rings are used to seal the gap between valve body 1 and plunger pump body.

[0056] The sealing gasket is made of a material that is resistant to high and low temperatures and corrosion, preferably a PTFE gasket.

[0057] Material selection: The valve body 1 is made of high-strength, corrosion-resistant stainless steel 17-4. The magnetic sleeve 5 and magnetic base 3 are made of high-performance permanent magnet material samarium cobalt magnet to ensure sufficient magnetic force and system stability.

[0058] Installation Procedure: First, install the magnetic sleeve 5 and magnetic base 3 onto the guide bolt 6. Next, connect the guide bolt 6 to the valve body 1, ensuring that the magnetic poles of both are aligned and the spacing meets the predetermined design parameters. During installation, avoid impacts or damage to the magnets and ensure installation accuracy to guarantee the effectiveness of the magnetic force.

[0059] Commissioning and Optimization: After installation, the valve body assembly 1 is commissioned. By adjusting parameters such as magnet spacing and magnetic pole direction, the movement of the valve core and the opening and closing pressures of the valve under different operating conditions are tested. Based on the test results, corresponding optimization adjustments are made until the design specifications are met.

[0060] The detailed explanation of the working principle is as follows: During the operation of the plunger pump, the pressure generated by the fluid acts directly on the valve core, causing it to displace accordingly. During this process, the magnetic sleeve 5 and the magnetic seat 3 generate a force opposite to the direction of valve core movement due to the repulsive effect of their like magnetic poles. This force functions similarly to a spring, effectively pushing the valve core back to its initial position, thus closing the valve. When the fluid pressure is high enough to overcome the repulsive force generated by the magnetic assembly, the valve core moves again, opening the valve and allowing smooth fluid flow. By carefully designing the magnetic pole strength, spacing, and installation position of the magnetic assembly, the movement trajectory of the valve core and the opening and closing pressures of the valve can be precisely controlled. This allows for precise adjustment and control of the valve according to different working environments and conditions, ensuring normal and efficient operation under various conditions.

[0061] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A springless valve body assembly for a reciprocating plunger pump comprising a valve body and a valve core, characterized in that, The valve core consists of two sets of repulsive magnetic components and guide bolts, with each magnetic component slidably fitted onto the guide bolts.

2. The reciprocating plunger pump springless valve body assembly according to claim 1, characterized in that, The magnetic components are a magnetic sliding sleeve and a magnetic base.

3. The reciprocating plunger pump springless valve body assembly according to claim 2, characterized in that, The magnetic sliding sleeve has a limiting ring platform at one end, and a ring groove on the bottom surface of the limiting ring platform, with a magnet embedded in the ring groove.

4. The reciprocating plunger pump springless valve body assembly according to claim 3, characterized in that, The top surface of the magnetic base is provided with a semi-groove, and a magnet is embedded in the semi-groove.

5. The reciprocating plunger pump springless valve body assembly according to claim 4, characterized in that, The upper part of the guide bolt is provided with an external hexagonal limiting ring platform.

6. The reciprocating plunger pump springless valve body assembly according to any one of claims 1-5, characterized in that, The valve body is made of a non-magnetic metal material.

7. The reciprocating plunger pump springless valve body assembly according to claim 6, characterized in that, The valve body is made of stainless steel.

8. The reciprocating plunger pump springless valve body assembly according to claim 4, characterized in that, The magnet is a samarium cobalt magnet.

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