Valve body part nitriding protection device

Abstract

The utility model discloses a valve body part nitriding protection device, belongs to the technical field of surface treatment, and aims to solve the problem that the working efficiency is low when valve body parts are loaded into a nitriding furnace one by one. Comprising a lifting frame and a protective sleeve, a plurality of lifting rods are arranged on the upper portion of the lifting frame, anti-sliding grooves are formed in the upper end faces of the lifting rods, a cathode tray is arranged at the bottom end of the lifting frame, a lifting ring is arranged at the top end of the lifting frame, the upper portion of an inner hole of the protective sleeve is an unthreaded hole, and the lower portion of the inner hole of the protective sleeve is an internal threaded hole. The upper ends of the protection sleeves are provided with hanging belts, the multiple protection sleeves correspond to the multiple valve body parts one to one and are matched with the external thread flanges through the internal thread holes, and the multiple valve body parts are arranged on the cathode tray and hung on the multiple hanging rods in a one-to-one correspondence mode through the matching of the hanging belts and the anti-sliding grooves. According to the utility model, a plurality of valve body parts needing nitriding treatment can be simultaneously loaded into the nitriding furnace through the hoisting frame, so that the assembly and disassembly are convenient, and the production efficiency is greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of surface treatment, and in particular relates to a nitriding protection device for valve body parts. Background Art

[0002] Nitriding is a chemical heat treatment process that allows nitrogen atoms to penetrate into the surface of a workpiece in a certain medium at a certain temperature. During the nitriding process, nitrogen atoms are adsorbed onto the surface of the workpiece and diffuse into the surface of the workpiece, thereby changing the chemical composition and structure of the workpiece surface and obtaining excellent surface properties.

[0003] A valve body part is made of 40Cr, which is an alloy structural steel. It is an important part in the transmission system of an armored vehicle. The upper end of the valve body part is provided with an external threaded flange structure, and the outer periphery of the external threaded flange is provided with an M48×1.5 thread. According to design requirements, the surface of the valve body part needs to be nitrided except for the thread.

[0004] Because the valve body parts are nitrided in a glow ion nitriding furnace, in order to ensure the quality of the parts, it is necessary to consider anti-seepage protection of the non-nitrided surface during the nitriding process. Currently, a circular ring component with an internal threaded hole is used to cooperate with the external threaded flange of the valve body part to achieve nitriding protection. However, it is inconvenient to screw the circular ring component and the valve body part together by hand, and it is also very cumbersome to load and take out the nitriding furnace one by one, resulting in low work efficiency. Utility Model Content

[0005] The purpose of the utility model is to provide a nitriding protection device for valve body parts to solve the problem of low working efficiency when valve body parts are loaded into the nitriding furnace one by one. The technical solution adopted by the utility model is as follows:

[0006] A nitriding protection device for valve body parts, wherein the top of the valve body parts is provided with an external threaded flange, comprising a hanging frame and a protective sleeve, a plurality of hanging rods are provided on the upper part of the hanging frame, and a non-slip groove is opened on the upper end surface of the hanging rod, a cathode tray is provided at the bottom end of the hanging frame, and a hanging ring is provided at the top of the hanging frame, the inner hole of the protective sleeve is a light hole at the upper part and an internal threaded hole at the lower part, and the diameter of the light hole is equal to and aligned with the thread minor diameter of the internal threaded hole, a hanging belt is provided at the upper end of the protective sleeve, and a plurality of protective sleeves and a plurality of valve body parts are matched with the external threaded flange through the internal threaded hole in a one-to-one manner, a plurality of valve body parts are placed on the cathode tray, and a plurality of valve body parts are hung on a plurality of hanging rods in a one-to-one manner through the matching of the hanging belt and the non-slip groove.

[0007] Furthermore, a plurality of crescent wrench sockets are provided on the outer periphery of the protective sleeve.

[0008] Furthermore, the hanging frame also includes a column, the cathode tray is a circular plate component, the lower end of the column is connected to the center of the cathode tray, and one end of a plurality of hanging rods is respectively connected to the upper periphery of the column.

[0009] Furthermore, the column is a square column component, and the number of the hangers is four, and the four hangers are respectively arranged on the four sides of the column.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] The connection between the protective sleeve and the valve body parts is achieved through the cooperation of the internal thread hole and the external thread flange. The protective sleeve covers the thread structure of the valve body parts. The valve body parts are placed on the cathode tray or hung on the hanging rod. They are placed neatly and stably. Multiple valve body parts that need to be nitrided can be loaded into the nitriding furnace at the same time through the hanging frame, or multiple nitrided valve body parts can be taken out of the nitriding furnace at one time. The anti-seepage device is safe, reliable, and easy to assemble and disassemble during the nitriding process, which greatly improves the production efficiency. After assembly with the valve body parts, the sealing effect is good, the nitrided surface does not fit with other planes, and no leakage problems occur during the nitriding process. The placement and hanging are stable, relatively safe and reliable, and the loading and unloading are relatively convenient. The staggered placement design increases production efficiency and effectively reduces production costs. It is relatively easy to make and low in cost, and the corresponding matching dimensions can be replaced according to the actual product size. It meets the anti-seepage and control requirements of various external threaded valve bodies. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic front view of the cooperation between the valve body parts and the utility model;

[0013] Figure 2 It is a schematic top view of the cooperation between the valve body parts and the utility model;

[0014] Figure 3 is a front cross-sectional view of the protective sleeve;

[0015] Figure 4 is a top view of the protective cover;

[0016] Figure 5 It is a structural diagram of the valve body parts.

[0017] In the figure, 1. lifting frame, 11. column, 12. cathode tray, 13. hanging rod, 14. anti-slip groove, 15. lifting ring, 2. protective cover, 21. lifting belt, 22. internal thread hole, 23. crescent wrench bayonet, 24. light hole, 3. valve body parts, 31. external thread flange. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is described below by specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.

[0019] The connection mentioned in the present utility model is divided into fixed connection and detachable connection. The fixed connection is a non-detachable connection, including but not limited to conventional fixed connection methods such as folding connection, rivet connection, bonding connection and welding connection. The detachable connection includes but is not limited to conventional detachable methods such as bolt connection, snap connection, pin connection and hinge connection. When the specific connection method is not clearly defined, it is assumed that at least one connection method can be found in the existing connection methods to achieve the function, and those skilled in the art can choose according to their needs. For example: choose welding connection for fixed connection and bolt connection for detachable connection.

[0020] The present invention will be further described in detail below in conjunction with the accompanying drawings. The following embodiments are explanations of the present invention, but the present invention is not limited to the following embodiments.

[0021] Example: Figure 1 to Figure 5 As shown, a nitriding protection device for valve body parts is provided, the top end of the valve body part 3 is provided with an external threaded flange 31, including a hanging frame 1 and a protective sleeve 2, a plurality of hanging rods 13 are provided on the upper part of the hanging frame 1, and a non-slip groove 14 is opened on the upper end surface of the hanging rod 13, a cathode tray 12 is provided at the bottom end of the hanging frame 1, and a hanging ring 15 is provided at the top end of the hanging frame 1. The upper part of the inner hole of the protective sleeve 2 is a light hole 24, and the lower part is an internal threaded hole 22, and the diameter of the light hole 24 is equal to and aligned with the thread minor diameter of the internal threaded hole 22, a sling 21 is provided at the upper end of the protective sleeve 2, and a plurality of protective sleeves 2 and a plurality of valve body parts 3 are matched with the external threaded flange 31 through the internal threaded hole 22 in a one-to-one manner, and a plurality of valve body parts 3 are placed on the cathode tray 12, and a plurality of valve body parts 3 are hung on a plurality of hanging rods 13 in a one-to-one manner through the sling 21 and the non-slip groove 14.

[0022] A plurality of crescent wrench sockets 23 are provided on the outer periphery of the protective sleeve 2 .

[0023] The hanging frame 1 further comprises a column 11 . The cathode tray 12 is a circular plate component. The lower end of the column 11 is connected to the center of the cathode tray 12 . One end of a plurality of hanging rods 13 is respectively connected to the upper periphery of the column 11 .

[0024] The column 11 is a square column component, and there are four suspension rods 13 , which are respectively arranged on the four sides of the column 11 .

[0025] The utility model is used for nitriding protection of the non-nitriding surface of a valve body part 3. In order to ensure that the quality of the valve body part 3 after nitriding meets the design requirements, and in combination with the structural characteristics of the valve body part 3, the non-nitrided part of the valve body part 3 is designed to be protected by an anti-seepage tooling to ensure that there is no leakage, and the nitriding process of the valve body part 3 in the glow ion nitriding furnace is effectively implemented, thereby ensuring that the quality of the product meets the product performance requirements.

[0026] Before assembly, check whether the tooling is intact. If hoisting is required, check whether the lifting ring 15 is intact. Clean the impurities and oil stains on the parts and tooling. At the same time, there must be no rust to avoid affecting the anti-seepage and nitriding effects. After the nitriding treatment is completed, the protective sleeve 2 can be disassembled with a crescent wrench, and the hardness of the non-nitrided surface of the valve body part 3 can be checked. If the surface hardness is within the core hardness range specified in the drawing, it means that it meets the anti-seepage requirements.

[0027] The connection between the protective sleeve 2 and the valve body part 3 is achieved by cooperating with the internal threaded hole 22 and the external threaded flange 31. The protective sleeve 2 covers the threaded structure of the valve body part 3. The valve body part 3 is placed on the cathode tray 12 or hung on the hanging rod 13. The valve body part 3 is placed neatly and stably. A plurality of valve body parts 3 that need to be nitrided can be loaded into the nitriding furnace at the same time through the hanging frame 1, or a plurality of valve body parts 3 after nitriding can be taken out of the nitriding furnace at one time. The anti-seepage device is safe, reliable and easy to assemble and disassemble during the nitriding process, which greatly improves the production efficiency.

[0028] The external thread flange 31 is screwed until it abuts against the lower edge of the light hole 24 , so that the lower edge of the light hole 24 can seal the thread fibers of the external thread flange 31 , and the thread structure of the valve body part 3 is completely hidden in the internal thread structure of the protective sleeve.

[0029] The utility model has a good use effect. After being assembled with the valve body part 3, the sealing effect is good. The nitrided surface does not fit with other planes. No leakage occurs during the nitriding process. The placement and hanging are stable, relatively safe and reliable, and the loading and unloading are relatively convenient. The staggered placement design increases production efficiency and effectively reduces production costs. It is relatively easy to make and low in cost. The corresponding matching size can be replaced according to the actual product size. It meets the anti-seepage and control requirements of various external threaded valve bodies.

[0030] The above embodiments are merely illustrative of the present invention and do not limit its protection scope. Those skilled in the art may also make partial changes thereto, which are within the protection scope of the present invention as long as they do not exceed the spirit of the present invention.

Claims

1. A nitriding protection device for valve body parts, wherein the top end of the valve body part (3) is provided with an external threaded flange (31), characterized in that: The invention comprises a hanging frame (1) and a protective cover (2). The upper part of the hanging frame (1) is provided with a plurality of hanging rods (13). The upper end surface of the hanging rods (13) is provided with a non-slip groove (14). The bottom end of the hanging frame (1) is provided with a cathode tray (12). The top end of the hanging frame (1) is provided with a hanging ring (15). The upper part of the inner hole of the protective cover (2) is a light hole (24), and the lower part is an internal thread hole (22). The diameter of the light hole (24) is equal to the thread diameter of the internal thread hole (22). The upper end of the protective cover (2) is provided with a hanging belt (21). The plurality of protective covers (2) and the plurality of valve body parts (3) are matched with the external thread flange (31) through the internal thread hole (22) in a one-to-one manner. The plurality of valve body parts (3) are placed on the cathode tray (12). The plurality of valve body parts (3) are matched with the non-slip groove (14) in a one-to-one manner and hung on the plurality of hanging rods (13).

2. A valve body part nitriding protection device according to claim 1, characterized in that: A plurality of crescent wrench sockets (23) are arranged on the outer periphery of the protective sleeve (2).

3. A valve body part nitriding protection device according to claim 1 or 2, characterized in that: The hanging frame (1) also includes a column (11), the cathode tray (12) is a circular plate component, the lower end of the column (11) is connected to the center of the cathode tray (12), and one end of a plurality of hanging rods (13) is respectively connected to the upper periphery of the column (11).

4. A valve body part nitriding protection device according to claim 3, characterized in that: The column (11) is a square column component, and the number of the suspension rods (13) is four, and the four suspension rods (13) are respectively and correspondingly arranged on the four sides of the column (11).

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