A two-way sealing valve top rod processing auxiliary device
Patent Information
- Application Number
- CN202521999300.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-17
- Publication Date
- 2026-08-18
- Estimated Expiration
- 2035-09-17
AI Technical Summary
[0004]本实用新型为解决现有技术双向密封阀的顶杆无法装夹加工以及顶杆端面难以磨削平整的问题，提供一种双向密封阀门顶杆加工辅助装置，通过该装置对顶杆进行固定，能够实现对顶杆的磨床装夹加工，进而能够通过万能工具磨床实现对顶杆端面的磨削加工，能够有效地将顶杆端面磨削平整，提高加工效率和合格率
本实用新型的结构简单、使用效果好，其采用组合工装的形式对顶杆固定，能够被装夹到万能工具磨床的卡盘上，实现对顶杆的磨床装夹加工，拆卸方便；进而能够通过万能工具磨床实现对顶杆端面的磨削加工，去除手工化，能够有效地将顶杆端面磨削平整，提高加工效率和合格率。
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Figure CN224643103U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of valve technology, specifically to an auxiliary device for processing the push rod of a bidirectional sealing valve. Background Technology
[0002] Valves in the aerospace field typically feature miniaturization and lightweight design. Among these, the tiny push rod in a bidirectional sealing valve is a key component. This push rod is a compact, slender rod with a maximum outer diameter of 2.6 mm and end diameters of 0.7 mm, totaling 11.7 mm in length. Its extremely small size, comparable to a needle, makes machining it very difficult. Particularly important are the requirements for perpendicularity between the push rod's two end faces and the outer diameter, which must be less than 0.02 mm, and parallelism, which must be no greater than 0.01 mm. If these dimensional tolerances are not met, the valve core will become misaligned during energized operation, leading to sealing failure and leakage. During assembly and adjustment of the bidirectional sealing valve's stroke, the two end faces of the push rod are typically ground to ensure this.
[0003] In existing technologies, due to the extremely small size of the ejector pin, it is impossible to directly clamp and process the ejector pin. The conventional method for grinding the end face of the ejector pin is usually manual grinding. The operator holds one end of the ejector pin and places it vertically on sandpaper, then manually grinds the end face of the ejector pin back and forth using the action of the sandpaper. This manual grinding method is not only inefficient and difficult to operate, but also makes it difficult to grind the end face of the ejector pin to a smooth surface, resulting in a low pass rate. Summary of the Invention
[0004] This invention addresses the problems of the inability to clamp and process the push rod of existing bidirectional sealing valves and the difficulty in grinding the end face of the push rod to a smooth finish. It provides an auxiliary device for processing the push rod of a bidirectional sealing valve. This device fixes the push rod, enabling it to be clamped and processed on a grinding machine. Subsequently, a universal tool grinder can be used to grind the end face of the push rod, effectively grinding the end face of the push rod to a smooth finish, thereby improving processing efficiency and yield.
[0005] To achieve the above objectives, the technical solution of this utility model is: an auxiliary device for processing a bidirectional sealing valve push rod, comprising a sleeve and a clamping assembly detachably connected to the sleeve. The sleeve contains a push rod hole, a transition hole, a guide hole, and a threaded hole arranged coaxially from left to right. The diameter of the push rod hole is smaller than the diameter of the guide hole, and the push rod hole and the guide hole form a transition hole with an arc transition. The push rod is fitted inside the sleeve, and the clamping assembly can clamp and fix the push rod inside the sleeve. The push rod hole matches the front and rear ends of the push rod, and the guide hole matches the outer circle of the push rod. The guide hole guides the push rod to prevent it from becoming misaligned after assembly.
[0006] The clamping assembly includes a plug and a clamping shaft fixedly connected to the plug. The end of the clamping shaft furthest from the plug has a clamping shaft groove, which is coaxially aligned with and connected to the guide hole. The clamping shaft includes a threaded portion and connecting and clamping portions at both ends of the threaded portion. The clamping shaft is connected to the sleeve via a threaded hole and the threaded portion. The clamping portion is inserted into the guide hole. Through the engagement of the threaded hole and the threaded portion, the clamping portion of the clamping shaft can be rotated into the guide hole of the sleeve, thereby pressing the clamping portion of the clamping shaft against the outer truncated cone of the push rod, achieving clamping and fixing of the push rod. This allows for clamping and grinding of the push rod using a grinding machine. The clamping shaft groove provides an installation position for the non-grinding end of the push rod, ensuring that the push rod can be fitted and fixed inside the sleeve and that the clamping shaft can clamp and fix the push rod.
[0007] Furthermore, the diameter of the transition hole gradually increases from left to right, and the push rod hole is connected to the guide hole through the transition hole. The transition hole matches the connection between the front and rear ends of the push rod and the outer truncated cone to ensure that the push rod can be fitted into the sleeve and that its grinding end extends out of the push rod hole, thus enabling grinding of the push rod end face.
[0008] Furthermore, a threaded opening is provided between the guide hole and the threaded hole, and the guide hole, the threaded opening and the threaded hole are coaxial and interconnected in sequence; the diameter of the threaded opening is larger than the diameter of the guide hole and the threaded hole, and the threaded opening facilitates the drilling of internal threads in the sleeve to form a threaded hole.
[0009] Furthermore, the end of the threaded hole furthest from the guide hole is designed as a tapered alignment hole, with the smaller end facing inward and the larger end facing outward. This alignment hole design facilitates the rotation of the threaded portion of the plug shaft into the threaded hole of the sleeve.
[0010] Furthermore, the diameter of the plug is larger than the diameter of the plug shaft but smaller than the outer diameter of the sleeve, and the plug shaft is fixedly connected to the plug via a connecting part. The plug facilitates the operator's rotation of the plug shaft into the sleeve, and the plug shaft's tightening part secures the push rod fitted inside the sleeve; simultaneously, it ensures that the universal tool grinder's chuck clamps and secures the sleeve, achieving the effect of clamping and fixing the push rod on the universal tool grinder for grinding.
[0011] Furthermore, the threaded portion is larger than the diameter of the connecting portion and the tightening portion, and the connection structure between the threaded portion and the tightening portion matches the alignment hole, the purpose of which is to facilitate rotating the threaded portion of the plug shaft into the threaded hole of the sleeve.
[0012] Furthermore, the diameter of the tightening part is smaller than the diameter of the guide hole; the diameter of the plug shaft groove is larger than the diameter of the push rod hole and smaller than the diameter of the guide hole, ensuring that the tightening part of the plug shaft can extend into the guide hole to tighten and fix the push rod fitted in the sleeve, and ensuring that the non-grinding end of the push rod can extend into the plug shaft groove to avoid interference between the non-grinding end of the push rod and the plug shaft.
[0013] The beneficial effects of this utility model through the above technical solution are as follows: This utility model has a simple structure and good performance. It uses a combination tooling to fix the ejector rod, which can be clamped onto the chuck of a universal tool grinder to realize the grinding of the ejector rod. Disassembly is convenient. Then, the end face of the ejector rod can be ground by the universal tool grinder, eliminating manual labor and effectively grinding the end face of the ejector rod flat, improving processing efficiency and pass rate.
[0014] The inner hole of the sleeve matches the front and rear ends of the ejector rod. The ejector rod hole allows the ground end face of the ejector rod to extend out of the ejector rod hole. The guide hole matches the outer circle of the ejector rod and guides the ejector rod to prevent it from tilting after assembly, thus improving the pass rate of ejector rod grinding. The transition hole matches the connection between the front and rear ends of the ejector rod and the outer truncated cone to ensure that the ejector rod can be fitted into the sleeve and that its ground end extends out of the ejector rod hole. The sleeve is fixed by clamping it with the chuck of a universal tool grinder, which enables the grinding of the ejector rod end face by the grinder.
[0015] This invention utilizes the fit between the threaded hole and the threaded part to rotate the tightening part of the plug shaft into the guide hole of the sleeve, thereby achieving the effect of the tightening part of the plug shaft clamping and fixing the push rod. Furthermore, it enables the clamping and grinding of the push rod using a grinding machine. The plug shaft groove provides an installation position for the non-grinding end of the push rod, allowing the non-grinding end of the push rod to extend into the plug shaft groove, preventing interference between the non-grinding end of the push rod and the plug shaft. This ensures that the push rod can be fitted and fixed inside the sleeve and that the plug shaft can clamp and fix the push rod. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the structure of an auxiliary device for machining the push rod of a bidirectional sealing valve according to this utility model. Figure 1 ; Figure 2 This is a schematic diagram of the structure of an auxiliary device for machining the push rod of a bidirectional sealing valve according to this utility model. Figure 2 ; Figure 3 yes Figure 2 Schematic diagram of the cross-sectional structure at point AA; Figure 4 This is a schematic diagram of the structure of the sleeve of this utility model; Figure 5 yes Figure 4 Schematic diagram of the cross-sectional structure at point BB; Figure 6 This is a schematic diagram of the structure of the clamping component of this utility model. Figure 1 ; Figure 7 This is a schematic diagram of the structure of the clamping component of this utility model. Figure 2 ; Figure 8 yes Figure 7 A schematic diagram of the cross-sectional structure at the CC section; Figure 9 This is a schematic diagram of the structure of a push rod in existing technology.
[0017] The labels in the attached diagram are as follows: 1 is the sleeve, 101 is the push rod hole, 102 is the guide hole, 103 is the transition hole, 104 is the threaded opening, 105 is the threaded hole, 106 is the alignment hole, 2 is the plug, 3 is the plug shaft, 301 is the connecting part, 302 is the threaded part, 303 is the tightening part, and 304 is the plug shaft groove. Detailed Implementation
[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments: like Figures 1-9 As shown, an auxiliary device for machining a bidirectional sealing valve push rod includes a sleeve 1 and a clamping assembly detachably connected to the sleeve 1. The sleeve 1 contains a push rod hole 101, a transition hole 103, a guide hole 102, and a threaded hole 105, coaxially arranged from left to right. The diameter of the push rod hole 101 is smaller than the diameter of the guide hole 102, and the push rod hole 101 and the guide hole 102 form a transition hole 103 with an arc transition. In this embodiment, the sleeve 1 provides an installation position for the push rod whose end face needs to be ground. The push rod is fitted inside the sleeve 1 and tightened by the clamping assembly, thus clamping and fixing the push rod inside the sleeve 1. The assembled sleeve 1 and clamping assembly can be mounted on the chuck of a universal tool grinder, enabling the grinding of the push rod end face on the grinder.
[0019] The push rod hole 101 matches the front and rear ends of the push rod to prevent the push rod from shifting inside the sleeve 1 and to prevent the push rod from tilting during grinding of the end face. The push rod hole 101 allows the grinding end of the push rod to extend out of the sleeve 1. The exposed length of the grinding end of the push rod inside the sleeve 1 should not be too long to prevent the push rod from breaking during grinding. Specifically, in this embodiment, the exposed length of the grinding end of the push rod is 0.5 mm. In addition, the guide hole 102 guides the push rod and matches the outer circle of the push rod to prevent the push rod from tilting after assembly.
[0020] The tightening assembly includes a plug 2 and a plug shaft 3 fixedly connected to the plug 2. The end of the plug shaft 3 away from the plug 2 is provided with a plug shaft groove 304. The plug shaft groove 304 is coaxially arranged with the guide hole 102 and is connected to each other. The plug shaft 3 includes a threaded part 302 and a connecting part 301 and a tightening part 303 provided at both ends of the threaded part 302. The plug shaft 3 is connected to the sleeve 1 through the threaded hole 105 and the threaded part 302. The tightening part 303 is inserted into the guide hole 102. In this embodiment, the plug shaft groove 304 provides an installation position for the non-grinding end of the push rod. When the push rod is fitted into the sleeve 1, the grinding end face of the push rod extends out of the push rod hole 101. The plug shaft 3 rotates into the sleeve 1 through the engagement of the threaded part 302 and the threaded hole 105. The non-grinding end of the push rod extends into the plug shaft groove 304, avoiding interference between the non-grinding end of the push rod and the plug shaft 3. Through the engagement of the threaded part 302 and the threaded hole 105, the clamping part 303 of the plug shaft 3 can be rotated into the guide hole 102 of the sleeve 1, and the clamping part 303 is pressed against the outer truncated cone of the push rod to achieve clamping and fixing of the push rod, thereby realizing the clamping and grinding of the push rod by the grinding machine.
[0021] The diameter of the transition hole 103 gradually increases from left to right, and the push rod hole 101 is connected to the guide hole 102 through the transition hole 103. In this embodiment, the transition hole 103 matches the connection between the front and rear ends of the push rod and the outer truncated cone, ensuring that the push rod can be fitted into the sleeve 1 and that its grinding end extends out of the push rod hole 101.
[0022] A threaded opening 104 is provided between the guide hole 102 and the threaded hole 105. The guide hole 102, the threaded opening 104, and the threaded hole 105 are coaxial and interconnected. The diameter of the threaded opening 104 is larger than the diameters of the guide hole 102 and the threaded hole 105. In this embodiment, the left end of the threaded opening 104 has a cylindrical structure, and the diameter of the right end gradually decreases. Through the function of the threaded opening 104, it is convenient to process internal threads inside the sleeve 1 to form the threaded hole 105.
[0023] The end of the threaded hole 105 away from the guide hole 102 is set in a tapered shape to form an alignment hole 106, with the small end of the alignment hole 106 facing inward and the large end facing outward. In this embodiment, the diameter of the alignment hole 106 gradually increases in the direction away from the threaded hole 105. The alignment hole 106 facilitates the rotation of the threaded portion 302 of the plug shaft 3 into the threaded hole 105 of the sleeve 1, so that the tightening portion 303 of the plug shaft 3 tightens and fixes the push rod of the sleeve 1.
[0024] The diameter of the plug 2 is larger than the diameter of the plug shaft 3 and smaller than the outer diameter of the sleeve 1. The plug shaft 3 is fixedly connected to the plug 2 via the connecting part 301. In this embodiment, the diameter of the plug 2 is larger than the diameter of the plug shaft 3 so that the operator can rotate the plug shaft 3 through the plug 2; the diameter of the plug 2 is smaller than the outer diameter of the sleeve 1 so that the chuck of the universal tool grinder can clamp and fix the sleeve 1, thereby realizing the clamping and fixing of the push rod by the grinder and the grinding process.
[0025] The threaded portion 302 is larger than the diameter of the connecting portion 301 and the tightening portion 303. The connection structure between the threaded portion 302 and the tightening portion 303 matches the alignment hole 106. The purpose is to facilitate the rotation of the threaded portion 302 of the plug shaft 3 into the threaded hole 105 of the sleeve 1.
[0026] The diameter of the tightening part 303 is smaller than the diameter of the guide hole 102; the diameter of the plug shaft groove 304 is larger than the diameter of the push rod hole 101 and smaller than the diameter of the guide hole 102. In this embodiment, the diameter of the tightening part 303 is smaller than the diameter of the guide hole 102, which ensures that the tightening part 303 of the plug shaft 3 can extend into the guide hole 102 to tighten and fix the push rod fitted in the sleeve 1; the diameter of the plug shaft groove 304 is larger than the diameter of the push rod hole 101, which ensures that the non-grinding end of the push rod can extend into the plug shaft groove 304 to avoid interference between the non-grinding end of the push rod and the plug shaft 3.
[0027] The working principle of this utility model is as follows: First, the push rod to be ground is fitted into the sleeve 1. The end face of the push rod to be ground is inserted into the sleeve. The grinding end of the push rod passes through the alignment hole 106, the threaded hole 105, the threaded opening 104, the guide hole 102, and the push rod hole 101 in sequence and extends out of the sleeve 1. The exposed length of the grinding end of the push rod is 0.5mm. The outer circle of the push rod matches the guide hole 102, which guides the push rod. Then, the push rod is tightened and fixed by the tightening assembly. Specifically, the operator rotates the plug shaft 3 through the plug 2. The clamping part 303 of the plug shaft 3 is rotated into the guide hole 102 through the engagement of the threaded part 302 and the threaded hole 105 until the end of the clamping part 303 abuts against the outer truncated cone of the push rod, and the push rod is fixed by the clamping part 303 of the plug shaft 3; finally, the device is clamped on the chuck of the universal tool grinder, the chuck of the universal tool grinder clamps and fixes the sleeve 1, and then the universal tool grinder can grind the end face of the push rod. Before processing, the runout of the end face of the push rod is aligned to be no more than 0.01mm, and the end face of the push rod is ground with a grinding wheel to ensure the required dimensions.
[0028] The embodiments described above are merely preferred embodiments of the utility model and are not intended to limit the scope of the utility model. Therefore, all equivalent changes or modifications made to the technical solutions described in the scope of the utility model patent application should be included within the scope of the utility model patent application.
Claims
1. An auxiliary device for machining the push rod of a bidirectional sealing valve, characterized in that, The device includes a sleeve (1) and a clamping assembly detachably connected to the sleeve (1). The sleeve (1) includes a push rod hole (101), a transition hole (103), a guide hole (102) and a threaded hole (105) arranged coaxially from left to right. The diameter of the push rod hole (101) is smaller than the diameter of the guide hole (102). The push rod hole (101) and the guide hole (102) are connected by an arc to form the transition hole (103). The tightening assembly includes a plug (2) and a plug shaft (3) fixedly connected to the plug (2). The end of the plug shaft (3) away from the plug (2) is provided with a plug shaft groove (304). The plug shaft groove (304) is coaxially arranged with the guide hole (102) and connected to each other. The plug shaft (3) includes a threaded part (302) and a connecting part (301) and a tightening part (303) provided at both ends of the threaded part (302). The plug shaft (3) is connected to the sleeve (1) through the threaded hole (105) and the threaded part (302). The tightening part (303) is inserted into the guide hole (102).
2. The auxiliary device for machining the push rod of a bidirectional sealing valve according to claim 1, characterized in that, The diameter of the transition hole (103) gradually increases from left to right, and the top rod hole (101) is connected to the guide hole (102) through the transition hole (103).
3. The two-way seal valve poppet machining aid of claim 2, wherein, A threaded opening (104) is provided between the guide hole (102) and the threaded hole (105). The guide hole (102), the threaded opening (104) and the threaded hole (105) are coaxial and interconnected. The diameter of the threaded opening (104) is larger than the diameter of the guide hole (102) and the threaded hole (105).
4. The auxiliary device for machining the push rod of a bidirectional sealing valve according to claim 1, characterized in that, The end of the threaded hole (105) away from the guide hole (102) is set in a tapered shape to form an alignment hole (106), with the small end of the alignment hole (106) facing inward and the large end facing outward.
5. The auxiliary device for machining the push rod of a bidirectional sealing valve according to claim 1, characterized in that, The diameter of the plug (2) is greater than the diameter of the plug shaft (3) and less than the outer diameter of the sleeve (1). The plug shaft (3) is fixedly connected to the plug (2) through the connecting part (301).
6. The auxiliary device for machining the push rod of a bidirectional sealing valve according to claim 4, characterized in that, The threaded portion (302) is larger than the diameter of the connecting portion (301) and the tightening portion (303), and the connection structure between the threaded portion (302) and the tightening portion (303) matches the alignment hole (106).
7. The auxiliary device for machining the push rod of a bidirectional sealing valve according to claim 1, characterized in that, The diameter of the tightening part (303) is smaller than the diameter of the guide hole (102); the diameter of the plug shaft groove (304) is larger than the diameter of the top rod hole (101) and smaller than the diameter of the guide hole (102).