CN204805198U - Wear -resisting case of environmental protection and hydrovalve - Google Patents

Abstract

The utility model relates to an environment-friendly and wear-resistant valve core and a hydraulic valve, wherein the environment-friendly and wear-resistant valve core includes a valve core substrate, and the valve core substrate is provided with a wear-resistant and anti-corrosion alloy layer, and the wear-resistant and anti-corrosion alloy layer is nickel Phosphorus iron chromium alloy layer. The utility model adopts a nickel-phosphorus-iron-chromium alloy layer, and compared with the alloy layer in the prior art, the utility model has high wear resistance and anticorrosion performance, low cost of raw materials, environmental protection and no pollution. The hydraulic valve provided by the utility model includes the above-mentioned environment-friendly and wear-resistant valve core.

Description

An environmentally friendly wear-resistant spool and hydraulic valve

technical field

The utility model relates to the field of hydraulic equipment, in particular to an environment-friendly wear-resistant valve core and a hydraulic valve.

Background technique

Environmental protection is the development direction of hydraulic valves. As a key component of the spool, green manufacturing is an inevitable trend. At present, the surface treatment methods of the valve core are mainly three types: high-frequency quenching, nitrocarburizing, and hard chrome plating. Among them, although high-frequency quenching has high production efficiency, its anti-rust effect is poor; although nitrocarburizing has good anti-rust effect, its production efficiency is low, and it is only suitable for mass production; hard chrome plating is currently the most widely used surface The treatment method, although the anti-rust effect is good, but the hexavalent chromium ion produced in the production is a carcinogen, which is harmful to the health of the operators, and also produces waste gas and waste water containing cyanide, which seriously endangers people's physical and mental health. Healthy and ecological environment, and only suitable for mass production.

In the prior art, in view of performance requirements such as wear resistance and corrosion resistance on the surface of the valve core, it is also proposed to use techniques such as thermal spraying to strengthen the surface of the valve core. Unfortunately, although these solutions can improve the performance of the spool, the process is complicated and the cost is high, which is limited to experimental research and is not conducive to industrialization.

With the gradual implementation of the national green environmental protection policy, the requirements for the green manufacturing of valve cores are getting higher and higher. At the same time, the needs of customers are becoming more and more diverse, and the valve core is required to be suitable for small batch and large batch production. To sum up, how to realize the green environmental protection of the spool while improving its wear-resistant and anti-corrosion performance, which is suitable for large and small batch production, is a technical problem to be solved by those skilled in the art.

Utility model content

The purpose of the utility model is to provide an environment-friendly wear-resistant spool and a hydraulic valve, wherein the environment-friendly wear-resistant spool has better wear resistance, is environmentally friendly and has low cost.

In order to achieve the above purpose, the utility model provides an environmentally friendly and wear-resistant valve core, which includes a valve core base, on which a wear-resistant and anti-corrosion alloy layer is arranged, and the wear-resistant and anti-corrosion alloy layer is nickel phosphorus iron chromium alloy layer.

In a preferred or optional embodiment, the valve core base is made of No. 45 steel.

In order to achieve the above purpose, the utility model also provides a hydraulic valve, which includes the environmentally friendly and wear-resistant valve core in any one of the above embodiments.

In a preferred or optional embodiment, the hydraulic valve further includes a valve body, a spring and an end cover, the environmentally friendly and wear-resistant spool is installed in the spool hole inside the valve body, and the environmentally friendly and wear-resistant valve One end of the core is connected to the spring, and the other end of the environmentally friendly and wear-resistant valve core is connected to the end cover.

Based on the above technical solution, the utility model has at least the following beneficial effects:

The utility model adopts a nickel-phosphorus-iron-chromium alloy layer, and compared with the alloy layer in the prior art, the utility model has high wear resistance and anticorrosion performance, low cost of raw materials, environmental protection and no pollution.

In a preferred or optional embodiment, No. 45 steel is used as the base material to make the valve core. Compared with the 42CrMo valve core material, the cost is greatly reduced under the condition of the same strength.

Description of drawings

The drawings described here are used to provide a further understanding of the utility model and constitute a part of the application. The schematic embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute improper limitations to the utility model. In the attached picture:

Fig. 1 is a structural schematic diagram of one of the schematic embodiments of the environmentally friendly wear-resistant valve core provided by the utility model;

Fig. 2 is a B-B cross-sectional schematic diagram of one of the schematic embodiments of the environmentally friendly and wear-resistant valve core provided by the utility model.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present utility model.

In describing the present invention, it should be understood that the terms "central", "longitudinal", "transverse", "front", "rear", "left", "right", "vertical", "horizontal" , "top", "bottom", "inner", "outer" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, rather than indicating Or imply 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 limiting the protection scope of the present utility model.

As shown in Figure 1 and Figure 2, it is one of the schematic embodiments of the environmentally friendly wear-resistant valve core provided by the utility model. In this schematic embodiment, the environmentally friendly wear-resistant valve core includes a valve core base 1, a valve core base 1 is provided with a wear-resistant and anti-corrosion alloy layer, and the wear-resistant and anti-corrosion alloy layer is a nickel-phosphorus-iron-chromium alloy layer 2, wherein the content of nickel in the nickel-phosphorus-iron-chromium alloy layer 2 ranges from about 40% to 70%, and the content of phosphorus The ratio range is about 5%-20%, the iron content ratio range is about 20%-40%, and the chromium content ratio range is about 5%-10%.

In the above exemplary embodiment, the valve core base 1 can be made into a corresponding shape and structure according to actual needs, and the surface of the valve core base 1 is strengthened by setting a nickel-phosphorus-iron-chromium alloy layer 2. Compared with the existing nickel-phosphorus-iron-chromium alloy layer 2 There are tungsten carbide coatings, Ni60 coatings, etc. in the art, and the cost of raw materials is low, and the degree of combination with the valve core substrate 1 is high. The bonding degree of the nickel-phosphorus-iron-chromium alloy layer 2 is above 500MPa, while the bonding degree of the tungsten carbide coating and the Ni60 coating is about 70MPa.

Moreover, the nickel-phosphorus-iron-chromium alloy layer 2 has higher wear resistance, anti-corrosion performance, and higher bonding degree than the nickel-phosphorus alloy layer, nickel-phosphorus-copper alloy layer, and nickel-phosphorus-boron alloy layer. Experiments have proved that the wear resistance of the nickel-phosphorus-iron-chromium alloy layer 2 can be increased by about one time, and the corrosion resistance can be increased by about three times compared with the nickel-phosphorus alloy layer, nickel-phosphorus-copper alloy layer and nickel-phosphorus-boron alloy layer; The bonding degree of the alloy layer, the nickel-phosphorus-copper alloy layer and the nickel-phosphorus-boron alloy layer is 200MPa-300MPa, while the bonding degree of the nickel-phosphorus-iron-chromium alloy layer 2 adopted in the utility model is above 500MPa. Compared with the electroplated chromium layer, the nickel-phosphorus-iron-chromium alloy layer 2 has no pollution and low raw material cost.

In summary, the utility model adopts the nickel-phosphorus-iron-chromium alloy layer 2 as the surface strengthening layer of the valve core base 1, which has low cost, high wear resistance and corrosion resistance, environmental protection and pollution-free, and is easy for industrial production.

In the exemplary embodiment of the environmentally friendly wear-resistant valve core provided by the utility model, the valve core base 1 is made of No. 45 steel. Compared with No. 25 steel and other materials, No. 45 steel is more suitable for the medium pressure state, and No. 45 steel is used as the valve core substrate 1, which is easy to be processed in the manufacturing process and has good comprehensive processing performance. And the utility model adopts No. 45 steel as the base material to prepare the valve core. Compared with 42CrMo, the material composition is simple and the cost is low. The 42CrMo material composition is complicated and the cost is high. In the case of the same strength, the utility model uses No. 45 steel as the The valve core base 1 greatly reduces its own cost, and the No. 45 steel is easier to combine with the nickel-phosphorus-iron-chromium alloy layer 2 .

In the schematic embodiment of the environmentally friendly and wear-resistant valve core provided by the utility model, the nickel-phosphorus-iron-chromium alloy layer 2 can be formed by soaking the valve core base 1 in a green and environment-friendly alloy plating solution (environmentally friendly special surface alloy plating solution).

In a preferred or optional embodiment, before the nickel-phosphorus-iron-chromium alloy layer 2 is prepared, the valve core substrate 1 is first cleaned with a weak acid or weak base cleaning agent. This process has no environmental pollution, and the cleaning time is about 2 minutes to 5 minutes. It can ensure the cleaning effect and production efficiency; the time for the green and environment-friendly alloy plating solution to soak the valve core substrate 1 is about 20 minutes to 40 minutes. During this time period, the bonding strength between the nickel-phosphorus-iron-chromium alloy layer 2 and the valve core substrate 1 is higher , the surface hardness and wear resistance of the nickel-phosphorus-iron-chromium alloy layer 2 can better meet the use requirements.

The utility model uses a green and environment-friendly alloy plating solution to soak the valve core substrate 1 to form a nickel-phosphorus-iron-chromium alloy layer 2, which does not require further processing, has a short process chain, low production cost, high surface finish, and small friction coefficient, which can reduce the valve core. And the friction loss of the matching parts in motion is easy for industrial production.

The utility model uses a green and environment-friendly alloy plating solution to soak the valve core substrate 1 to form a nickel-phosphorus-iron-chromium alloy layer 2. Compared with the existing thermal spraying process, the utility model has low preparation cost of the alloy layer and is easy for industrial production. Compared with the chromium layer process, the preparation process of the alloy layer of the utility model has no environmental pollution problem, and the production cost is low. And the utility model adopts No. 45 steel as the base material, which is easier to combine with the nickel-phosphorus-iron-chromium alloy layer 2, while the 42CrMo material composition in the prior art is complicated, and it is not suitable to be immersed in a green and environment-friendly alloy plating solution as the valve core base 1. Alloy layer is formed.

In addition, the utility model uses a green and environment-friendly alloy plating solution to soak the valve core substrate 1 to form the nickel-phosphorus-iron-chromium alloy layer 2, which is easy to realize large and small batch production.

The environmentally friendly and wear-resistant valve core provided by the utility model is prepared with a nickel-phosphorus-iron-chromium alloy layer 2 after the valve core base 1 is precisely ground, and the raw material cost is low; the valve core base 1 is made of No. The size and surface roughness required by the valve core can be achieved by cutting and other processes. The outer surface of the valve core substrate 1 is soaked in a green and environmentally friendly alloy plating solution to form a green, environmentally friendly, wear-resistant and anti-corrosion nickel-phosphorus-iron-chromium alloy layer 2. The preparation process is seamless. Environmental pollution, no need for subsequent processing, less equipment investment, short process chain, low production cost, high surface finish, low friction coefficient, easy control of processing accuracy, and easy realization of large and small batch production.

However, in the preparation process of the alloy layer of the traditional valve core, multiple grinding processes are required after the surface treatment. Since the surface treatment layer is relatively thin, the processing is difficult and the precision is difficult to control.

In addition to the above-mentioned spool, the utility model also provides a schematic embodiment of a hydraulic valve. In the schematic embodiment of the hydraulic valve, the hydraulic valve includes the environmentally friendly and wear-resistant spool in any of the above-mentioned embodiments.

In the schematic embodiment of the hydraulic valve provided by the utility model, the hydraulic valve also includes a valve body, a spring and an end cover. The environmentally friendly and wear-resistant valve core is installed in the valve core hole inside the valve body. The spring is connected, and the other end of the environmentally friendly and wear-resistant spool is connected to the end cover.

The hydraulic valve provided by the utility model is equipped with the above-mentioned environmentally friendly wear-resistant valve core provided by the utility model, and correspondingly, the hydraulic valve also has the technical effect of the environmentally friendly wear-resistant valve core provided by the utility model.

In summary, the environmentally friendly and wear-resistant valve core provided by the utility model forms a nickel-phosphorus-iron-chromium alloy layer 2 by soaking the valve core substrate 1 in a green and environment-friendly alloy plating solution, which can improve its wear resistance and corrosion resistance, and its surface finish is high. The friction coefficient is small, which can reduce the friction loss of the valve core and matching parts in motion. At the same time, the environmental pollution problem caused by electrochrome plating is solved, and the processing cost is reduced. At the same time, using No. 45 steel as the base material to make the valve core, compared with the material of the 42CrMo valve core, it greatly reduces its own cost under the condition of the same strength. In addition, the valve core of the utility model is easy to realize large and small batch production.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model and not limit it; although the utility model has been described in detail with reference to the preferred embodiment, those of ordinary skill in the art should understand that: still The specific implementation of the utility model can be modified or some technical features can be equivalently replaced; without departing from the spirit of the technical solution of the utility model, all of them should be included in the scope of the technical solution claimed by the utility model.

Claims (4)

1. An environment-friendly wear-resistant spool, is characterized in that: comprise spool substrate (1), described spool substrate (1) is provided with wear-resistant and anti-corrosion alloy layer, described wear-resistant and anti-corrosion alloy layer is nickel phosphorus iron Chrome layer (2). 2. The environmentally friendly and wear-resistant valve core according to claim 1, characterized in that: the valve core base (1) is made of No. 45 steel. 3. A hydraulic valve, characterized in that it comprises the environmentally friendly and wear-resistant spool as claimed in claim 1 or 2. 4. The hydraulic valve according to claim 3, characterized in that: the hydraulic valve also includes a valve body, a spring and an end cover, and the environmentally friendly and wear-resistant spool is installed in the spool hole inside the valve body, One end of the environmentally friendly wear-resistant valve core is connected to the spring, and the other end of the environmentally friendly wear-resistant valve core is connected to the end cover.