Novel valve cover and production process thereof

Abstract

The invention relates to the technical field of valve machining, in particular to a novel valve cover and a production process thereof. Comprising a base, an annular pipe, a reinforcing face, a fixing ring and annular grooves, the annular grooves are formed in the center of a base body, the two annular grooves are formed in the base body and are close to the two ends of the base body respectively, and the annular pipe is arranged on the upward working face of the base. Comprising the steps of raw material detection, heating and material preparation, blank making and forging, intermediate detection, edge cutting and shaping, cooling and cutting, welding and machining, final detection, cleaning and polishing and equipment maintenance. The valve cover has the beneficial effects that through tight connection of the annular pipe and the annular groove, the sealing performance of the valve cover is improved, and medium leakage is effectively prevented. Through strict raw material detection and quality detection of each link, the quality of the valve cover can be effectively improved, the sealing performance and the pressure resistance of the valve cover are enhanced, and the occurrence of product faults and leakage problems is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of valve processing, and particularly relates to a novel valve cover and its production process. Background Art

[0002] In the prior art, as an important part of a valve, the structural design of the valve cover directly affects the performance and service life of the valve. There are some deficiencies in the structure of traditional valve covers. For example, the sealing performance is not good, and the structural strength is insufficient. Poor sealing performance is likely to cause medium leakage, which not only results in waste of resources but may also pollute the environment; while insufficient structural strength may lead to deformation, damage, etc. during long-term use, affecting the normal use of the valve, increasing the maintenance cost and potential safety hazards.

[0003] As an important part of a valve, the quality of the valve cover directly affects the performance and service life of the valve. The traditional valve cover production process has certain limitations in terms of product quality, production efficiency, and cost control, and it is difficult to meet the growing market demand. For example, the valve covers produced by traditional processes perform poorly in terms of sealing and pressure resistance, are prone to leakage and other problems, and at the same time, the equipment is severely worn during the production process, resulting in an increase in production costs.

[0004] Therefore, it is necessary to design a novel valve cover and its production process to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to solve the drawbacks existing in the prior art, and a novel valve cover and its production process are proposed. The technical solution adopted by the present invention is as follows:

[0006] A novel valve cover and its production process include a base, an annular pipe, a strengthening surface, a fixing ring, and an annular groove. The annular groove is arranged at the central position of the base body. Two annular grooves are respectively arranged on the base body, and the two annular grooves are respectively arranged near both ends of the base body. The annular pipe is arranged on the upward working surface of the base, and the inner bottom end of the annular pipe is connected to the outer side of the annular groove.

[0007] As an improvement, the base body is designed in a rhombus shape, and the four corners of the base are all designed in an arc shape.

[0008] As an improvement, the strengthening surface is designed in an arc shape, and the strengthening surface is connected at the junction of the base and the annular pipe.

[0009] As an improvement, the inner diameter of the annular pipe is the same as the diameter of the annular groove.

[0010] A production process for a new type of valve cover, characterized by including raw material inspection, heating and stock preparation, blank making and forging, intermediate inspection, trimming and shaping, cooling and cutting, welding and processing, final inspection, cleaning and polishing, and equipment maintenance.

[0011] Raw material inspection: Before heating and stock preparation, strictly inspect the quality of the cut rolled steel and plates. Use a spectral analyzer to detect the chemical composition of the cut rolled steel, and use an ultrasonic flaw detector to detect the flaws of the plates.

[0012] Heating and stock preparation: Heat the cut rolled steel to 900 - 1250 °C with an electronic high-frequency furnace to obtain a billet. At the same time, cut the plates to make a cuboid blank one and a cylindrical blank two.

[0013] Blank making and forging: Upset the billet to make a blank. The starting forging temperature is 900 - 1250 °C, and then successively perform hot rough forging (900 - 1150 °C) and hot finish forging (800 - 1000 °C). During the forging process, use an infrared thermometer to monitor the billet temperature in real time.

[0014] Intermediate inspection: After hot finish forging, perform preliminary dimensional inspection and hardness inspection on the forgings. Use a coordinate measuring machine to measure the key dimensions of the forgings, and use a Rockwell hardness tester to detect the hardness.

[0015] Trimming and shaping: Trim the hot finish forging blank with a punch press, and shape and punch holes with a 315 - 630T punch press.

[0016] Cooling and cutting: Naturally cool to ≤200 °C, heat the heating furnace to 1050 °C ± 10 °C, keep warm for ≥2h and then water cool, and then perform positive defocus laser cutting. After cutting, detect the roughness of the cutting surface.

[0017] Welding and processing: Laser weld the valve cover and the sleeve; Precision turn the two symmetric side holes on both sides with a machine tool. After welding is completed, detect the welding part through X-ray flaw detection.

[0018] Final inspection: Conduct a comprehensive performance inspection on the processed valve cover, including sealing performance test, pressure resistance test, etc. Use a helium mass spectrometer leak detector for the sealing performance test, and use a special pressure test device for the pressure resistance test.

[0019] Cleaning and polishing: Degrease, pickling to remove oil and dirt, sandpaper grinding, grinding to remove burrs, and polish with a shot blasting machine to obtain the finished product.

[0020] Equipment maintenance: After each batch of production is completed, conduct a comprehensive maintenance on equipment such as the electronic high-frequency furnace, punch press, laser cutting machine, and machine tool. Clean the oil stains, iron filings and other impurities on the surface and inside of the equipment, check the wear condition of the key components, and replace the vulnerable parts in time.

[0021] The beneficial effects of the present invention are:

[0022] A novel valve cover and its production process according to the present invention enhance the sealing performance of the valve cover through the tight connection between the annular pipe and the annular groove, effectively preventing medium leakage; the diamond-shaped and arc-shaped corner design of the base, as well as the setting of the strengthening surface, enhance the structural strength of the valve cover, enabling it to withstand greater pressure, reducing the risk of deformation and damage, and extending the service life of the valve;

[0023] Through strict raw material inspection and quality inspection of each link, the quality of the valve cover can be effectively improved, its sealing performance and pressure resistance can be enhanced, and the occurrence of product failures and leakage problems can be reduced;

[0024] The reasonable heating and forging processes, as well as precise temperature control, improve the quality and production efficiency of the forgings and reduce the rejection rate;

[0025] Advanced welding and processing techniques ensure the structural accuracy and stability of the valve cover.

[0026] Obviously, based on the above content of the present invention, according to the common general knowledge and customary means in the art, without departing from the above basic technical idea of the present invention, various other forms of modifications, substitutions or changes can be made.

[0027] The following is a further detailed description of the above content of the present invention through specific embodiments in the form of examples. However, this should not be construed as limiting the scope of the above subject matter of the present invention to the following examples. All technologies implemented based on the above content of the present invention fall within the scope of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is the front view structural schematic diagram of the present invention;

[0029] Figure 2 is the top view structural schematic diagram of the present invention.

[0030] Correspondence Table of Reference Numerals in the Drawings:

[0031] 1. Base; 2. Annular pipe; 3. Strengthening surface; 4. Fixed ring; 5. Annular groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0033] To solve the technical problems in the background art, a novel valve cover and its production process are given as follows:

[0034] Combined Figure 1 - Figure 2 As shown, a new type of valve cover and its production process provided by the present invention include a base, an annular pipe, a strengthening surface, a fixing ring, and an annular groove. The base body is diamond-shaped, and the four corners of the base are arc-shaped. The annular groove is arranged at the center of the base body. Two annular grooves are respectively arranged on the base body and are respectively close to both ends of the base body. The annular pipe is arranged on the upward working surface of the base, and the inner bottom end of the annular pipe is connected to the outer side of the annular groove. The inner diameter of the annular pipe is the same as the diameter of the annular groove. The strengthening surface is arc-shaped and is connected at the junction of the base and the annular pipe.

[0035] A production process of a new type of valve cover is characterized by including raw material inspection, heating and material preparation, blank making and forging, intermediate inspection, trimming and shaping, cooling and cutting, welding and processing, final inspection, cleaning and polishing, and equipment maintenance.

[0036] Raw material inspection: Before heating and material preparation, strict quality inspection is carried out on the cut steel bars and plates. The chemical composition of the cut steel bars is detected by a spectral analyzer, and the flaw detection of the plates is carried out by an ultrasonic flaw detector.

[0037] Heating and material preparation: The cut steel bars are heated to 900 - 1250 °C by an electronic high-frequency furnace to obtain billets. At the same time, the plates are cut to make a cuboid blank one and a cylindrical blank two.

[0038] Blank making and forging: The billets are upset to make blanks. The initial forging temperature is 900 - 1250 °C, and then hot rough forging (900 - 1150 °C) and hot finish forging (800 - 1000 °C) are carried out in sequence. During the forging process, an infrared thermometer is used to monitor the temperature of the billets in real time.

[0039] Intermediate inspection: After hot finish forging, preliminary dimensional inspection and hardness inspection are carried out on the forgings. A three-coordinate measuring instrument is used to measure the key dimensions of the forgings, and a Rockwell hardness tester is used to detect the hardness.

[0040] Trimming and shaping: The hot finish forging blanks are trimmed by a punch press, and a 315 - 630T punch press is used for shaping and punching.

[0041] Cooling and cutting: Naturally cool to ≤200 °C, heat the heating furnace to 1050 °C ± 10 °C, keep warm for ≥2 h and then water-cool, and then perform positive defocus laser cutting. After cutting, the roughness of the cutting surface is detected.

[0042] Welding and processing: Laser weld the valve cover and the sleeve; Precision turn the symmetric side holes on both sides by a machine tool. After welding is completed, the welding part is detected by X-ray flaw detection.

[0043] Final inspection: Comprehensive performance inspection is carried out on the processed valve cover, including sealing performance test, pressure resistance test, etc. The sealing performance test is carried out by a helium mass spectrometer leak detector, and the pressure resistance test uses a special pressure test equipment.

[0044] Cleaning and Polishing: Degreasing, pickling to remove oil and dirt, sandpaper grinding, abrasive machining to remove burrs, and shot blasting to obtain the finished product;

[0045] Equipment Maintenance: After the production of each batch, comprehensively maintain and service equipment such as electronic high-frequency furnaces, punching machines, laser cutting machines, and machine tools. Clean the oil stains, iron filings and other impurities on the surface and inside of the equipment, check the wear of key components, and replace vulnerable parts in a timely manner.

[0046] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

[0047] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0048] The above is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

[0049] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A novel valve cover, characterized in that, It includes a base (1), an annular tube (2), a strengthening surface (3), a fixing ring (4) and an annular groove (5). The annular groove (5) is arranged at the central position of the base (1) body. Two annular grooves (5) are respectively arranged on the base (1) body, and the two annular grooves (5) are respectively arranged near both ends of the base (1) body. The annular tube (2) is arranged on the upward working surface of the base (1), and the inner side of the bottom end of the annular tube (2) is connected to the outer side of the annular groove (5).

2. A novel valve cover according to claim 1, characterized in that, The base (1) body is designed in a rhombus shape, and the four corners of the base (1) are all designed in an arc shape.

3. A novel valve cover according to claim 1, characterized in that, The strengthening surface (3) is designed in an arc shape, and the strengthening surface (3) is connected at the junction of the base (1) and the annular tube (2).

4. A novel valve cover according to claim 1, characterized in that, The inner diameter of the annular tube (2) is the same as the diameter of the annular groove (5).

5. A production process for a new type of valve cover, characterized in that, It includes raw material detection, heating and material preparation, blank making and forging, intermediate detection, trimming and shaping, cooling and cutting, welding and processing, final detection, cleaning and polishing, and equipment maintenance. Raw material detection: Before heating and material preparation, strict quality inspection is carried out on the cut steel bars and sheets. A spectral analyzer is used to detect the chemical composition of the cut steel bars, and an ultrasonic flaw detector is used to detect the flaws of the sheets. Heating and material preparation: The cut steel bars are heated to 900 - 1250 °C with an electronic high-frequency furnace to obtain billets. At the same time, the sheets are cut to make a cuboid blank one and a cylindrical blank two. Blank making and forging: The billets are upset to make blanks, and the starting forging temperature is 900 - 1250 °C. Then, hot rough forging (900 - 1150 °C) and hot finish forging (800 - 1000 °C) are carried out in sequence. During the forging process, an infrared thermometer is used to monitor the temperature of the billets in real time. Intermediate detection: After hot finish forging, preliminary dimensional inspection and hardness inspection are carried out on the forgings. A coordinate measuring machine is used to measure the key dimensions of the forgings, and a Rockwell hardness tester is used to detect the hardness. Trimming and shaping: The hot finish forging blanks are trimmed by a punching machine, and a 315 - 630T punching machine is used for shaping and punching. Cooling and cutting: Naturally cooled to ≤200 °C, the heating furnace is heated to 1050 °C ± 10 °C, held for ≥2 h and then water-cooled, and then positively defocused laser cutting is carried out. After cutting, the roughness of the cutting surface is detected. Welding and processing: The valve cover and the sleeve are laser welded; the two symmetric side holes on both sides are precision turned by a machine tool. After welding is completed, the welded part is detected by X-ray flaw detection. Final detection: Comprehensive performance detection is carried out on the processed valve cover, including sealing performance test, pressure resistance test, etc. The sealing performance test uses a helium mass spectrometer leak detector, and the pressure resistance test uses a special pressure test equipment. Cleaning and polishing: Degreasing, pickling to remove oil and dirt, sandpaper grinding, grinding to remove burrs, and shot blasting to polish to obtain the finished product. Equipment maintenance: After the production of each batch is completed, comprehensive maintenance and repair are carried out on equipment such as the electronic high-frequency furnace, punching machine, laser cutting machine, and machine tool. The oil stains, iron filings and other impurities on the surface and inside of the equipment are cleaned, the wear condition of the key components is checked, and the vulnerable parts are replaced in time.

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