Machining tool for valve body flow channel of ultralow-temperature liquid hydrogen stop valve

Abstract

The utility model relates to the technical field of machining tools, and provides an ultralow-temperature liquid hydrogen stop valve body flow channel machining tool which comprises a supporting piece, the supporting piece is provided with a cylindrical holding part, and during machining, a four-shaft swing head clamps the holding part through a three-jaw chuck; a fixing plate and a positioning plate are fixedly connected to the supporting piece, at least two guide rods are fixedly connected between the fixing plate and the positioning plate and between the fixing plate and the positioning plate, a pressing plate is connected to the two guide rods in a sliding mode, a positioning column used for being matched with an inner hole of a valve body is arranged on the positioning plate, and a pressing bolt is connected to the fixing plate through threads. And the valve body is tightly pressed by the pressing plate by screwing the pressing bolt. The valve body is not directly clamped through a three-jaw chuck, so that the valve body is prevented from being damaged; in the process that the compression bolt is screwed to compress or loosen the valve body, the pressing plate can only be close to or far away from the valve body, and damage to the valve body caused by the pressing plate is also avoided; and the positioning plate is provided with the positioning column matched with the inner hole of the valve body, so that the positioning is more reliable, and the positioning precision is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of processing tools, and in particular to a processing tool for a flow channel of a valve body of an ultra-low temperature liquid hydrogen stop valve. Background Art

[0002] Cryogenic liquid hydrogen stop valves are used in liquid hydrogen processing systems. They are used to control the flow and pressure of liquid hydrogen in the system and prevent liquid hydrogen leakage. Their performance and quality directly affect the safety and reliability of the liquid hydrogen processing system.

[0003] When processing the flow channel hole of the valve body of the ultra-low temperature liquid hydrogen stop valve, the inner hole for installing the valve stem assembly has been processed on the valve body, and there is a certain angle between the center line of the flow channel hole and the center line of the inner hole. In the prior art, the flow channel hole is usually processed by a four-axis (or more-axis) machining center, and the four-axis swing head of the machining center clamps the valve body through a three-jaw chuck. However, this method is easy to damage the valve body when clamping, and the positioning accuracy is poor and the positioning is unreliable. Utility Model Content

[0004] The utility model aims to provide a tooling for processing a flow passage of a valve body of an ultra-low temperature liquid hydrogen stop valve, so as to solve the above-mentioned defects of the prior art.

[0005] The embodiments of the present invention are implemented by the following technical solutions:

[0006] A tool for processing the flow channel of a valve body of an ultra-low temperature liquid hydrogen stop valve comprises a support member, the support member is provided with a cylindrical holding portion, and during processing, a four-axis swing head clamps the holding portion through a three-jaw chuck; a fixing plate and a positioning plate are fixedly connected to the support member, and at least two guide rods are fixedly connected between the fixing plate and the positioning plate, and a pressure plate is slidably connected to the two guide rods, and a positioning column for cooperating with an inner hole of the valve body is provided on the positioning plate, and a clamping bolt is threadedly connected to the fixing plate so that the clamping bolt can be turned to clamp the valve body.

[0007] Optionally, a spring is provided between the pressure plate and the positioning plate, and the spring is sleeved on the guide rod.

[0008] Optionally, a pressure cylinder is rotatably arranged at one end of the clamping bolt close to the pressure plate.

[0009] Optionally, one end of the pressure cylinder is open, and the open end is sleeved on the end of the clamping bolt. The side wall of the pressure cylinder is threadedly connected with a radial screw, and the clamping bolt is provided with a limiting ring groove, and the radial screw extends into the annular limiting ring groove; a ball is embedded in the end of the clamping bolt, and the ball is against the bottom of the pressure cylinder.

[0010] Optionally, the width of the limiting ring groove is greater than the major diameter of the radial screw.

[0011] Optionally, the positioning plate is connected to the support member by screws.

[0012] This practical technical solution has at least the following advantages and beneficial effects:

[0013] 1. In the utility model, the valve body is not clamped directly by a three-jaw chuck, thereby avoiding damage to the valve body. Moreover, in the process of tightening or loosening the valve body by turning the clamping bolt, the pressure plate can only move in a translational manner toward or away from the valve body, thereby avoiding damage to the valve body by the pressure plate.

[0014] 2. In the utility model, a positioning column for cooperating with the inner hole of the valve body is provided on the positioning plate, so that the positioning is more reliable and the positioning accuracy is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 This is a front view of a tooling for processing the flow channel of a valve body of an ultra-low temperature liquid hydrogen stop valve provided by the utility model;

[0017] Figure 2 A left view of a tooling for processing the flow channel of a valve body of an ultra-low temperature liquid hydrogen stop valve provided by the utility model;

[0018] Figure 3 A top view of a valve body flow channel processing tooling for an ultra-low temperature liquid hydrogen stop valve provided by the utility model;

[0019] Figure 4 for Figure 3 AA section view;

[0020] Icon: 1-support, 101-holding part, 2-fixing plate, 3-positioning plate, 301-positioning column, 4-guide rod, 5-pressure plate, 6-spring, 7-pressure cylinder, 8-tensioning bolt, 9-radial screw, 10-ball, 11-valve body, 1101-inner hole. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0024] refer to Figure 1-3 A tooling for processing the flow channel of a valve body of an ultra-low temperature liquid hydrogen stop valve includes a support member 1, and the support member 1 is provided with a cylindrical holding portion 101. During processing, the four-axis swing head clamps the holding portion 101 through a three-jaw chuck. That is, in the utility model, the valve body 11 is not directly clamped by a three-jaw chuck, thereby avoiding damage to the valve body 11. In practical applications, after the three-jaw chuck clamps the holding portion 101, it can be aligned by a tool such as a dial indicator, so that the axis of the holding portion 101 is parallel to the workbench of the machining center, that is, the surface of the support member 1 opposite to the workbench is parallel to the surface of the workbench.

[0025] The support member 1 is fixedly connected with a fixing plate 2 and a positioning plate 3. The fixing plate 2 and the positioning plate 3 are provided with a positioning column 301 for cooperating with the inner hole 1101 of the valve body 11, so as to facilitate accurate positioning of the valve body 11. Compared with the prior art, the positioning is more reliable and the positioning accuracy is improved. Furthermore, the positioning plate 3 is connected to the stop valve support member 1 by screws. Such a configuration allows the positioning plate 3 to be disassembled, so that the positioning plate 3 with positioning columns 301 of different sizes can be replaced according to the valve body 11 with inner holes 1101 of different sizes, thereby improving the versatility of the tooling.

[0026] Two guide rods 4 are fixedly connected between the fixed plate 2 and the positioning plate 3 (in some embodiments, the number of guide rods 4 can also be increased), and a pressure plate 5 is slidably connected to the two guide rods 4, that is, a through hole is provided on the pressure plate 5, and the guide rods 4 pass through the through hole. A clamping bolt 8 is threadedly connected to the fixed plate 2. When in use, the clamping bolt 8 is turned to move it closer to or away from the pressure plate 5, so as to achieve the tightening or loosening of the valve body 11, and the pressure plate 5 can only move linearly towards or away from the valve body 11, thereby avoiding damage to the valve body 11 by the pressure plate 5.

[0027] Furthermore, a spring 6 is provided between the pressure plate 5 and the stop valve positioning plate 3, and the spring 6 is sleeved on the stop valve guide rod 4. In this arrangement, when the pressure plate 5 is pressing the valve body 11, the spring 6 is pressed, and when the clamping bolt 8 is turned away from the pressure plate 5, the pressure plate 5 can automatically rebound under the action of the spring 6, making the operation more convenient.

[0028] refer to Figure 4 In this embodiment, a pressure cylinder 7 is rotatably provided at one end of the clamping bolt 8 close to the stop valve pressure plate 5, so that after the pressure cylinder 7 abuts against the pressure plate 5, the clamping bolt 8 can rotate relative to the pressure cylinder 7 to prevent the pressure plate 5 from being worn.

[0029] In this embodiment, the specific arrangement of the pressing cylinder 7 is as follows: one end of the pressing cylinder 7 is open, and the open end is sleeved on the end of the clamping bolt 8. The side wall of the pressing cylinder 7 is threadedly connected with a radial screw 9, and the clamping bolt 8 is provided with a limiting ring groove. The radial screw 9 extends into the annular limiting ring groove. It is easy to understand that the bolt does not abut against the bottom of the limiting ring groove; a ball 10 is embedded in the end of the clamping bolt 8, and the ball 10 abuts against the bottom of the pressing cylinder 7. It is worth noting that the ball 10 is in contact with the pressing cylinder 7, so that the clamping bolt 8 can rotate more smoothly relative to the pressing cylinder 7.

[0030] Furthermore, the width of the stop valve limiting ring groove is greater than the major diameter of the stop valve radial screw 9, so that the pressure cylinder 7 can move axially a certain distance relative to the clamping bolt 8. After the pressure cylinder 7 and the pressure plate 5 are against each other, it can ensure that the ball 10 can be against the bottom of the pressure cylinder 7.

[0031] In addition, it should be understood that the above-mentioned setting method of the pressure cylinder 7 is only an option, not a limitation. In some embodiments, if the service life of the bearing is not considered, the clamping bolt 8 and the pressure cylinder 7 can also be connected through a bearing.

[0032] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A tooling for processing the flow channel of a valve body of an ultra-low temperature liquid hydrogen stop valve, characterized in that: The invention comprises a support member (1), wherein the support member (1) is provided with a cylindrical holding portion (101), and during processing, the four-axis swing head clamps the holding portion (101) through a three-jaw chuck; a fixing plate (2) and a positioning plate (3) are fixedly connected to the support member (1), and at least two guide rods (4) are fixedly connected between the fixing plate (2) and the positioning plate (3), and a pressure plate (5) is slidably connected to the two guide rods (4), and a positioning column (3) is provided on the positioning plate (3) for matching with an inner hole (1101) of a valve body (11), and a clamping bolt (8) is threadedly connected to the fixing plate (2), so that the clamping bolt (8) can be turned to make the pressure plate (5) clamp the valve body (11).

2. The ultra-low temperature liquid hydrogen stop valve body flow channel processing tooling according to claim 1 is characterized in that: A spring (6) is provided between the pressure plate (5) and the positioning plate (3), and the spring (6) is sleeved on the guide rod (4).

3. The ultra-low temperature liquid hydrogen stop valve body flow channel processing tooling according to claim 1 is characterized in that: A pressure cylinder (7) is rotatably provided at one end of the clamping bolt (8) close to the pressure plate (5).

4. The ultra-low temperature liquid hydrogen stop valve body flow channel processing tooling according to claim 3 is characterized in that: One end of the pressure cylinder (7) is open, and the open end is sleeved on the end of the clamping bolt (8). The side wall of the pressure cylinder (7) is connected with a radial screw (9) through a thread. The clamping bolt (8) is provided with a limiting ring groove, and the radial screw (9) extends into the annular limiting ring groove. A ball (10) is embedded in the end of the clamping bolt (8), and the ball (10) abuts against the bottom of the pressure cylinder (7).

5. The ultra-low temperature liquid hydrogen stop valve body flow channel processing tooling according to claim 4 is characterized in that: The width of the limiting ring groove is greater than the major diameter of the radial screw (9).

6. The ultra-low temperature liquid hydrogen stop valve body flow channel processing tooling according to any one of claims 1 to 5, characterized in that: The positioning plate (3) is connected to the support member (1) via screws.

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