Inlet and outlet one-way valve of pump

Abstract

The utility model provides an inlet and outlet one-way valve of a pump. The inlet and outlet one-way valve comprises a valve seat 1 and a valve disc 2. The valve disc 2 is of an integrated structure. The contact surface between the valve disc 2 and the valve seat 1 is of a hard sealing structure, and the contact surface of the valve disc 2 and the contact surface of the valve seat 1 are coupled in pairs, are complementary in yin and yang, and are in tight contact to realize sealing; and the contact surface between the valve disc 2 and the valve seat 1 is a frustum-shaped or cambered surface. The scheme provided by the utility model has the beneficial effects that the product is simple in structure and shape and easy to manufacture; the hard sealing contact material is good in high temperature resistance; the hard sealing contact surface is wear-resistant, erosion-resistant, good in corrosion resistance and long in service life; the service life of the product is prolonged, the product quality is improved, and good social benefits are gained; and the machining difficulty is reduced, mechanization and automation are facilitated, and the product precision is improved.

Description

Technical Field

[0001] The utility model is applicable to but not limited to the technical fields of various mud pumps, oil drilling pumps, marine pumps and the like, and in particular relates to an inlet and outlet check valve of a pump. Background Art

[0002] The inlet and outlet check valves of existing pumps are soft seals between the metal of the valve seat and the rubber of the valve disc, and there are the following major problems: on the one hand, most of the check valves used in mud pumps and drilling pumps currently have rubber seals. Although they meet the sealing performance, the rubber material has poor high temperature resistance, low high strength resistance, poor wear resistance, poor compression resistance, easy edge breakage, poor aging resistance, and poor erosion resistance, which make its service life very short, only 100-200 hours, and the user cost is very high; on the other hand, the metal part on the valve disc also has hard contact with the metal of the valve seat, causing the metal sealing surface of the contact surface of the valve seat to be subjected to different contact stresses, causing the metal sealing surface of the valve seat to no longer be flush, forming grooves, causing seal failure, and then quickly causing the check valve to leak, be damaged, and lose function.

[0003] Now there is an urgent need for a technical solution with long service life and low cost. Summary of the invention

[0004] The main purpose of the utility model is to overcome the defects of the prior art and provide an inlet and outlet check valve for a pump.

[0005] The utility model provides an inlet and outlet check valve for a pump, comprising a valve seat 1 and a valve disc 2; the valve disc 2 is an integrated structure; the contact surface between the valve disc 2 and the valve seat 1 is a hard sealing structure, the contact surface of the valve disc 2 and the contact surface of the valve seat 1 are coupled in pairs, the yin and yang complement each other, and the sealing is achieved through close contact; the contact surface between the valve disc 2 and the valve seat 1 is a frustum or an arc surface.

[0006] More preferably, a spring is provided on the upper part of the valve disc 2, one end of the spring is connected to the upper part of the valve disc 2, and the other end is connected to the guide sleeve of the pump body.

[0007] Preferably, the cone angle or arc size of the contact surface is obtained by optimizing one or more of the parameters including pressure, fluid flow, diameter, fluid properties including the proportion of solid, liquid and gas components, temperature, corrosiveness, solid particle content and viscosity.

[0008] More preferably, the valve seat 1 and valve disc 2 are made of metal materials with hardness, strength, wear resistance, corrosion resistance, high temperature resistance, and easy forming and processing properties, and the contact surfaces of the valve disc and valve seat are precisely processed to achieve hard contact of metal surfaces and meet sealing requirements.

[0009] More preferably, the outer surface of the valve seat 1 is a conical surface.

[0010] More preferably, a semicircular groove is provided in the middle portion of the outer cone of the valve seat 1 for accommodating a positioning clamp ring.

[0011] More preferably, the semicircular groove in the middle part of the outer cone of the valve seat 1 is provided with sealing ring grooves above and below.

[0012] The beneficial effects of the technical solution of the utility model are as follows:

[0013] 1) The product has a simple structure and shape and is easy to manufacture;

[0014] 2) The material in contact with the hard seal has good high temperature resistance;

[0015] 3) The surface of the hard seal contact has good wear resistance, erosion resistance, corrosion resistance and long service life;

[0016] 4) Extend product life, improve product quality, and gain good social benefits;

[0017] 5) Reduce machining difficulty, facilitate mechanization and automation, and improve product precision. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model will be further described in the form of exemplary embodiments, which will be described in detail by way of the accompanying drawings. These embodiments are not restrictive, and in these embodiments, the same number represents the same structure.

[0019] Figure 1 Schematic diagram of the closed state of the one-way valve of the utility model;

[0020] Figure 2 Schematic diagram of the one-way valve of the utility model in the open state;

[0021] Figure 3 Schematic diagram of integrated structure valve disc;

[0022] Figure 4 Schematic diagram of installation and application of the one-way valve of the utility model;

[0023] Figure 5 Schematic diagram of the installation and application of the one-way valve of the utility model at the hydraulic end of the pump;

[0024] Figure 6 Schematic diagram of the functions of various parts of the valve seat of the one-way valve of the utility model;

[0025] Figure 7 Partial schematic diagram of the closed arc contact between the valve seat and the valve disc. DETAILED DESCRIPTION

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the following is a brief introduction to the drawings required for the description of the embodiments. Obviously, the drawings described below are only some examples or embodiments of the utility model. The technical features of each embodiment can be combined with each other to form a practical solution to achieve the purpose of the invention. For ordinary technicians in this field, the utility model can also be applied to other similar scenarios based on these drawings without creative work. Unless it is obvious from the language environment or otherwise explained, the same reference numerals in the figures represent the same structure or operation.

[0027] It should be understood that the "system" and "unit" used herein are a method for distinguishing different components, elements, parts, parts or assemblies at different levels. However, if other words can achieve the same purpose, the words can be replaced by other expressions. In addition, the "system" and "unit" can be implemented by software or hardware, and can be a physical or virtual name for the functional part.

[0028] The present invention uses a flow chart to illustrate the operations performed by the system according to the embodiments of the present invention. It should be understood that the preceding or following operations are not necessarily performed precisely in order. On the contrary, the various steps may be processed in reverse order or simultaneously. At the same time, other operations may be added to these processes, or one or more operations may be removed from these processes. The technical solutions in the various embodiments may be combined with each other to achieve the purpose of the present invention.

[0029] like Figure 1 As shown, a schematic diagram of the closed state of the inlet and outlet check valves of a pump of the utility model, the valve seat 1 and the valve disc 2 are closed; Figure 2 As shown, this is a schematic diagram of the one-way valve of the present invention in an open state, with the valve seat 1 and the valve disc 2 being open.

[0030] The utility model provides an inlet and outlet check valve for a pump, comprising a valve seat 1 and a valve disc 2; the valve disc 2 is an integrated structure; the contact surface between the valve disc 2 and the valve seat 1 is a hard sealing structure, the contact surface of the valve disc 2 and the contact surface of the valve seat 1 are coupled in pairs, the yin and yang complement each other, and the sealing is achieved through close contact; the contact surface between the valve disc 2 and the valve seat 1 is a frustum straight surface or an arc surface.

[0031] When the cone or arc surface of the valve disc 2 is in close contact with the cone straight surface or arc surface of the valve seat 1, automatic alignment and centering are achieved according to the principle of taper or arc action.

[0032] The valve disc contact surface and the valve seat contact surface appear in pairs, but they are not paired with the same shape and size. They are a product design pairing guided by the philosophical concept of yin and yang complementarity. The complementarity of the cone table surface of the valve disc 2 and the cone ring surface of the valve seat 1, or the complementarity of the arc surface structure, can achieve self-repair compensation for the wear resistance of the sealing surface, that is, after the valve disc 2 and the valve seat 1 are worn out during use, their contact surfaces can perform self-repair compensation functions, thereby obtaining excellent sealing performance and long service life.

[0033] The contact surface between the valve disc 2 and the valve seat 1 is a hard seal structure. The contact surface is precisely machined to achieve hard contact between metal surfaces and meet the sealing requirements of the application. When it is actually used in the pump, its service life reaches 500-600 hours, which greatly reduces the user cost. As the manufacturing process becomes more mature and complete, its service life still has a lot of room for improvement, and the goal is to reach about 2000 hours.

[0034] In the present utility model, the shape and angle of the contact between the valve disc 2 and the valve seat 1 can be an arc or a frustum straight surface. The shape and size of the arc surface are not spherical, and the arc does not reach the large arc of the spherical surface. It only has a certain small arc compared with the straight surface, and the arc is between the arc of the straight surface and the arc of the spherical surface. The spherical surface contact is difficult to process initially, and the contact surface cannot be self-repaired and compensated after wear after use. The wear results of the spherical surface of the valve disc and the valve seat in the application are different. The spherical surface size and shape of the valve disc and the valve seat will soon differ, and there will no longer be good contact, so the seal will soon fail, and there is actually no practical application value. The radius of curvature of the arc is not necessarily equal, it may be a variable diameter, or it may conform to a curve function relationship such as a parabola. The contact area of ​​the valve seat 1 and the valve disc 2 in the closed state forms an arc surface (line) or a straight surface (line), but is not limited to the above-mentioned contact shape. Figure 7 A partial schematic diagram of the closed arc surface contact between the valve seat and the valve disc, wherein the contact surface 15 is an arc surface, and the arc size can be adjusted.

[0035] The cone angle or arc size of the contact surface is optimized by pressure, fluid flow, diameter, fluid properties including the proportion of solid, liquid and gas, temperature, corrosiveness, solid particle content, viscosity and other parameters. The contact cone angle includes various possible angles to achieve the purpose of reliable sealing, wear resistance, impact resistance, corrosion resistance, erosion resistance and long service life.

[0036] like Figure 3The integrated structure valve disc (2) shown in the figure, the "integrated" mentioned here can be made by forging, casting, or by welding, bonding, spraying, plating, etc. The contact force of the whole is the attraction between molecules, rather than relying on mechanical fixing force to assemble the structure. The integrated manufacturing has high strength and good concentricity. The one-way valve with an integrated structure solves the problem of increasing the service life, which can reach a service life of 500-600 hours, and the benefit is significantly increased.

[0037] like Figure 4 As shown in the figure, the schematic diagram of the installation and application of the one-way valve is shown. A one-way valve is installed at the inlet and outlet ends respectively. The valve disc 2 moves away and approaches along the inner hole of the valve seat 1. When the outer cone surface 4 of the valve disc 2 is in close contact with the inner cone surface 5 of the valve seat 1, the valve disc 2 is subjected to fluid pressure, and the sealing surface of the contact part is subjected to huge stress. When the valve disc 2 is separated from the valve seat 1 and reaches the fully open state, the space formed between the outer cone surface 4 of the valve disc and the inner cone surface 5 of the valve seat 1 is the fluid channel 11, and its cone surface is subjected to the destructive effects of high-speed erosion, abrasion, corrosion, cavitation, etc. of the fluid.

[0038] like Figure 5 As shown, a spring 12 is provided on the upper part of the valve disc 2, one end of the spring 12 is connected to the upper part of the valve disc 2, and the other end is connected to the pump body guide sleeve 13. The initial effect of the spring 12 on the valve disc 2 improves the transient response parameters of the one-way valve at the moment of opening and closing, improves the one-way valve after it is worn in use, and plays a compensatory role in promoting the contact repair between the valve disc 2 and the valve seat 1, thereby extending the service life.

[0039] like Figure 5 , Figure 6 As shown, the outer surface of the valve seat 1 is a conical surface 9, and the outer conical surface 9 of the valve seat 1 cooperates with the conical hole of the pump hydraulic end base 14, which can automatically center and align, and position it securely according to the conical angle of the self-locking angle.

[0040] A semicircular groove 6 is provided in the middle of the outer cone of the valve seat 1 for accommodating a positioning clamp ring so that the positioning clamp ring can be installed repeatedly and consistently when the pump base 14 is installed, and can be easily pulled out when the valve seat 1 is replaced.

[0041] The semicircular groove in the middle part of the outer cone of the valve seat 1 is provided with sealing ring grooves above and below for accommodating the sealing ring, and the two O-ring sealing grooves provide two external sealing guarantees.

[0042] like Figure 6 As shown, the inner conical surface 5 and the outer conical surface 9 of the valve seat 1 are manufactured in an integrated manner, and have high strength and good concentricity.

[0043] Special metal materials with good wear resistance, high strength resistance, high temperature resistance, high hardness, good corrosion resistance and easy forming and processing are used. After precision processing and heat treatment process, hard contact of metal surfaces is achieved to meet the sealing requirements of valve seat 1 and valve disc 2, thereby eliminating rubber sealing rings; the surface of hard seal contact is wear-resistant, erosion-resistant, and corrosion-resistant, with a long service life, and wins good social benefits. The difficulty of machining is reduced, mechanization and automation are facilitated, and product precision is improved; special materials are mainly obtained by screening and optimizing the content of carbon, silicon, manganese, sulfur, phosphorus, nickel, chromium, molybdenum, niobium, tantalum, copper, iron and other components and their mutual proportions through experimental verification. Special materials can improve the organization through heat treatment process to obtain high strength and high hardness performance.

[0044] Improve strength performance through heat treatment process. Mainly through heating, heat preservation, incubation, cooling, and then heating, heat preservation and cooling to obtain the expected organization, with high strength and high hardness performance. Through appropriate heat treatment process technology solutions, the required impact resistance, wear resistance, corrosion resistance, and erosion resistance of the product are obtained, and the unique structural characteristics of the one-way valve product are obtained by using advanced sealing theory, etc., to achieve the requirements of high strength, reliable sealing, and long service life of the one-way valve.

[0045] The material and manufacturing process of the valve seat are of the same level as the valve disc, achieving a long service life.

[0046] The patented product of this utility model is applied to the one-way valve of the fluid suction port and discharge port of the hydraulic end of various mud pumps, oil drilling pumps, marine pumps, etc., as an opening and closing part to control the fluid delivery.

[0047] The utility model patented product is implemented in mud pump products. The materials of the valve seat 1 and the valve disc 2 can be selected from alloy steel, stainless steel, cast iron, cobalt-based alloy, ceramics, other hard non-metallic materials, but not limited to the above materials. The molding method can be selected from casting, forging, welding, coating, machining and other processing methods, but not limited to the above molding and processing methods. After appropriate heat treatment process, the product can achieve the required wear resistance, corrosion resistance, impact resistance, erosion resistance, cavitation resistance, high hardness, high strength and other properties.

[0048] The utility model adopts hard seal contact technology, and through the selection of appropriate materials, molding methods, heat treatment processes and mechanical processing technologies, the contact sealing surface between the valve disc 2 and the valve seat 1 has the performance of high hardness, low roughness and high strength, and achieves impact resistance, wear resistance, corrosion resistance and erosion resistance, thereby extending the service life and reducing costs.

[0049] It should be noted that different embodiments may produce different beneficial effects. In different embodiments, the beneficial effects that may be produced may be any one or a combination of the above, or any other beneficial effects that may be obtained.

[0050] The basic concepts have been described above. Obviously, for those skilled in the art, the above detailed disclosure is only an example and does not constitute a limitation of the present invention.

[0051] In addition, unless explicitly stated in the claims, the order of the processing elements and sequences, the use of alphanumeric characters, or the use of other names described in the present invention are not intended to limit the order of the processes and methods of the present invention. Although the above disclosure discusses some invention embodiments that are currently considered useful through various examples, it should be understood that such details are only for illustrative purposes, and the attached claims are not limited to the disclosed embodiments. On the contrary, the claims are intended to cover all modifications and equivalent combinations that are consistent with the essence and scope of the embodiments of the present invention.

[0052] Similarly, it should be noted that in order to simplify the description of the utility model disclosure and thus help understand one or more invention embodiments, in the above description of the utility model embodiments, multiple features are sometimes combined into one embodiment, drawing or description thereof. However, this disclosure method does not mean that the utility model object requires more features than those mentioned in the claims.

[0053] Finally, it should be understood that the embodiments described in the present invention are only used to illustrate the principles of the embodiments of the present invention. Other variations may also fall within the scope of the present invention. Therefore, as an example and not a limitation, alternative configurations of the embodiments of the present invention may be considered consistent with the teachings of the present invention. Accordingly, the embodiments of the present invention are not limited to the embodiments explicitly introduced and described in the present invention.

Claims

1. A pump inlet and outlet check valve, characterized in that: The invention comprises a valve seat (1) and a valve disc (2); the valve disc (2) is an integrated structure; the contact surface between the valve disc (2) and the valve seat (1) is a hard sealing structure, the contact surface of the valve disc (2) and the contact surface of the valve seat (1) are coupled in pairs, and a seal is achieved by close contact; the contact surface between the valve disc (2) and the valve seat (1) is a frustum straight surface or an arc surface; a spring is provided on the upper part of the valve disc (2), one end of the spring is connected to the upper part of the valve disc (2), and the other end is connected to the guide sleeve of the pump body.

2. The one-way valve according to claim 1, characterized in that: The outer surface of the valve seat (1) is a conical surface.

3. The one-way valve according to claim 1, characterized in that: A semicircular groove is provided in the middle of the outer cone of the valve seat (1) for accommodating a positioning clamp ring.

4. The one-way valve according to claim 3, characterized in that: The semicircular groove in the middle part of the outer cone of the valve seat (1) is provided with sealing ring grooves above and below.

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