A clamp for machining the pin hole of a single-disc check valve

Abstract

This utility model discloses a fixture for machining the pin hole of a single-disc check valve, including a centering mechanism and a clamping mechanism. The centering mechanism includes a base, a central platform connected to the top of the base, and a crosshair laser positioning light embedded in the top of the central platform. The clamping mechanism includes multiple supports connected between the base and the central platform. In this utility model, the crosshair laser positioning light is turned on, and the pin is placed between two symmetrical clamping plates. The clamping plates are closed to initially fix the pin. Then, the clamping plate close to the opening position is moved towards the central platform. This clamping plate drives the pin to move until the opening position coincides with the crosshair laser positioning light. The operator uses the crosshair laser line as a reference to determine that the opening position is aligned with the center of the crosshair laser line, and the centering operation is completed. The screws on the two sliders are tightened to lock and fix the pin, and then the pin can be machined.

Description

Technical Field

[0001] This utility model relates to the field of clamping technology, specifically a clamp for machining the pin hole of a single-lobe check valve. Background Technology

[0002] A check valve is a type of valve whose opening and closing element is a circular valve disc that relies on its own weight and the pressure of the medium to actuate and prevent backflow of the medium. It belongs to the category of automatic valves and is also known as a non-return valve, one-way valve, reflux valve, or isolation valve. The valve disc movement is divided into lift type and swing type. The lift type check valve is structurally similar to a gate valve, except that it lacks a valve stem to drive the valve disc. The medium flows in from the inlet end (bottom) and flows out from the outlet end (top). When the inlet pressure is greater than the sum of the valve disc's weight and its flow resistance, the valve is opened. Conversely, when the medium flows backward, the valve is closed.

[0003] The through holes on the pin are usually eccentrically positioned, biased towards one end of the shaft. This means that when a traditional self-centering clamp holds the pin, it cannot center the eccentric through hole in the clamp, resulting in inaccurate positioning during subsequent hole drilling operations. Utility Model Content

[0004] This utility model aims to solve one of the technical problems existing in the prior art or related technologies.

[0005] Therefore, the technical solution adopted by this utility model is as follows:

[0006] A fixture for machining the pin hole of a single-disc check valve includes a centering mechanism and a clamping mechanism. The centering mechanism includes a base, a central platform connected to the top of the base, and a crosshair laser positioning light embedded in the top of the central platform. The clamping mechanism includes multiple supports connected between the base and the central platform, a slider that slides through the top of the supports, a clamping plate that is engaged with the top of the slider, and two rotating rods located outside the clamping plate and screwed to the slider.

[0007] By adopting the above technical solution, the crosshair laser positioning light is turned on, and the pin is placed between two symmetrical clamping plates. The clamping plates are closed to initially fix the pin. Then, the clamping plate close to the opening position is moved towards the center platform. This clamping plate drives the pin to move until the opening position coincides with the crosshair laser positioning light. The operator uses the crosshair laser line as a reference to determine that the opening position is aligned with the center of the crosshair laser line. After the centering operation is completed, the screw rods on the two sliders are tightened to lock and fix the pin. The pin can then be processed.

[0008] In a preferred embodiment, the present invention can be further configured such that: the base has multiple threaded holes, which are arranged in pairs to form four groups, with two threaded holes in each group located on both sides of the multiple supports.

[0009] In a preferred embodiment, this utility model can be further configured as follows: multiple supports are equally spaced and arranged in a ring around the outside of the crosshair laser positioning light, and the top of the supports is flush with the top of the central platform.

[0010] In a preferred embodiment, the present invention can be further configured such that: the slider is composed of a convex block and a V-shaped extension plate, the V-shaped extension plate is suspended above the support and is integrally formed with the convex block, and the rotating rod vertically penetrates the V-shaped extension plate.

[0011] In a preferred embodiment, the present invention can be further configured such that: multiple clamping plates have frustum-shaped openings on their inner sides, and the multiple frustum-shaped openings are located on the same horizontal plane.

[0012] In a preferred embodiment, the present invention can be further configured such that a guide rod is embedded at the top of the support, and the guide rod slides through the convex block.

[0013] In a preferred embodiment, the present invention can be further configured such that: the top of the convex block has a slot suitable for clamping the clamping plate, and the slot is located inside the V-shaped extension plate.

[0014] By adopting the above technical solution, the beneficial effects achieved by this utility model are as follows:

[0015] 1. In this utility model, the crosshair laser positioning light is turned on, the pin is placed between two symmetrical clamping plates, and the clamping plates are closed to initially fix the pin. Then, the clamping plate close to the opening position is moved towards the center platform. The clamping plate drives the pin to move until the opening position coincides with the crosshair laser positioning light. The operator uses the crosshair laser line as a reference to determine that the opening position is aligned with the center of the crosshair laser line. After the centering operation is completed, the screw rods on the two sliders are tightened to lock and fix the pin, and the pin can then be processed.

[0016] 2. In this utility model, the pin is placed between two symmetrically arranged clamping plates, and then both ends of the pin extend into the frustum-shaped openings on the two clamping plates respectively. The frustum-shaped openings guide the pin to be placed horizontally, ensuring the opening effect. Attached Figure Description

[0017] Figure 1 This is a perspective view of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the centering mechanism of this utility model;

[0019] Figure 3 This is a schematic diagram of the clamping mechanism of this utility model;

[0020] Figure 4 This is a schematic diagram showing the connection relationship between the slider, clamping plate, rotating rod, and guide rod of this utility model;

[0021] Figure 5 This is a perspective view of the slider of this utility model.

[0022] Figure label:

[0023] 100. Centering mechanism; 110. Base; 120. Center platform; 130. Crosshair laser positioning light;

[0024] 200. Clamping mechanism; 210. Support; 220. Slider; 221. Convex block; 222. V-shaped extension plate; 230. Clamping plate; 240. Rotary rod;

[0025] 300. Threaded hole;

[0026] 400, guide rod;

[0027] 500, Groove. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0029] It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of this invention.

[0030] The following describes, with reference to the accompanying drawings, some embodiments of the present invention, a fixture for machining the pin hole of a single-lobe check valve.

[0031] Example 1:

[0032] Combination Figure 1-5 As shown, the present invention provides a fixture for machining the pin hole of a single-lobe check valve, including a centering mechanism 100 and a clamping mechanism 200. The centering mechanism 100 includes a base 110, a central platform 120 connected to the top of the base 110, and a crosshair laser positioning light 130 embedded in the top of the central platform 120.

[0033] The clamping mechanism 200 includes a plurality of supports 210 connected between the base 110 and the center platform 120, a slider 220 that slides through the top of the support 210, a clamping plate 230 that is engaged with the top of the slider 220, and two rotating rods 240 located outside the clamping plate 230 and screwed to the slider 220.

[0034] Furthermore, multiple supports 210 are evenly spaced and arranged around the outside of the crosshair laser positioning light 130. The top of the support 210 is flush with the top of the center platform 120. The height design of the support 210 allows the pin to be placed horizontally on the top of the center platform 120, which facilitates the clamping of the pin by the two symmetrically arranged clamping plates 230.

[0035] Furthermore, the slider 220 is composed of a convex block 221 and a V-shaped extension plate 222. The V-shaped extension plate 222 is suspended from the top of the support 210 and is integrally formed with the convex block 221. The rotating rod 240 vertically penetrates the V-shaped extension plate 222. The shape design of the slider 220 can distinguish the placement of the rotating rod 240, making it convenient for operators to screw the rotating rod 240 to fix the convex block 221.

[0036] Furthermore, a guide rod 400 is embedded in the top of the support 210. The guide rod 400 slides through the convex block 221. The guide rod 400 further improves the stability of the convex block 221 during translation.

[0037] Furthermore, the top of the convex block 221 is provided with a slot 500 suitable for engaging with the clamping plate 230. The slot 500 is located inside the V-shaped extension plate 222, and the slot 500 provides conditions for clamping the clamping plate 230.

[0038] Example 2:

[0039] Combination Figure 1-2 As shown, based on Embodiment 1, the base 110 is provided with a plurality of threaded holes 300. The plurality of threaded holes 300 are arranged in pairs, forming four groups. The two threaded holes 300 in each group are located on both sides of the plurality of supports 210. The threaded holes 300 are provided to facilitate the connection of the base 110 with external equipment.

[0040] Example 3:

[0041] Combination Figure 1 , 3 As shown in Figure 4, in the above embodiment, multiple clamping plates 230 have frustum-shaped openings on their inner sides. The multiple frustum-shaped openings are located on the same horizontal plane. The frustum-shaped openings can guide the pin shaft and guide the pin shaft to be horizontally clamped between the two symmetrically arranged clamping plates 230.

[0042] The working principle and usage process of this utility model are as follows: Turn on the crosshair laser positioning light 130, place the pin between two symmetrical clamping plates 230, close the clamping plates 230 to initially fix the pin, then move the clamping plate 230 close to the opening position towards the center platform 120. The clamping plate 230 drives the pin to move until the opening position coincides with the crosshair laser positioning light 130. The operator uses the crosshair laser line as a reference to determine that the opening position is aligned with the center of the crosshair laser line, and then completes the centering operation. Finally, tighten the screw rod 240 on the two sliders 220 to lock and fix it, and the pin can be opened.

[0043] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A fixture for machining a single-flap check valve pin bore, characterized by, include: Centering mechanism (100), the centering mechanism (100) includes a base (110), a central platform (120) connected to the top of the base (110), and a crosshair laser positioning light (130) embedded in the top of the central platform (120); The clamping mechanism (200) includes a plurality of supports (210) connected between the base (110) and the center platform (120), a slider (220) that slides through the top of the support (210), a clamping plate (230) that is engaged with the top of the slider (220), and two rotating rods (240) located outside the clamping plate (230) and screwed to the slider (220).

2. The fixture for machining the pin hole of a single-lobe check valve according to claim 1, characterized in that, The base (110) has multiple threaded holes (300), which are arranged in pairs to form four groups. The two threaded holes (300) in each group are located on both sides of the multiple supports (210).

3. The fixture for machining the pin hole of a single-disc check valve according to claim 1, characterized in that, Multiple supports (210) are evenly spaced and arranged around the outside of the crosshair laser positioning light (130), with the top of the supports (210) flush with the top of the center platform (120).

4. The fixture for machining the pin hole of a single-lobe check valve according to claim 1, characterized in that, The slider (220) is composed of a convex block (221) and a V-shaped extension plate (222). The V-shaped extension plate (222) is suspended above the support (210) and is integrally formed with the convex block (221). The rotating rod (240) passes vertically through the V-shaped extension plate (222).

5. A fixture for machining the pin hole of a single-lobe check valve according to claim 1, characterized in that, Multiple clamping plates (230) have frustum-shaped openings on their inner sides, and the multiple frustum-shaped openings are located on the same horizontal plane.

6. A fixture for machining the pin hole of a single-disc check valve according to claim 4, characterized in that, The top of the support (210) is fitted with a guide rod (400), which slides through the convex block (221).

7. A fixture for machining the pin hole of a single-lobe check valve according to claim 4, characterized in that, The top of the convex block (221) is provided with a slot (500) suitable for engaging with the clamping plate (230), and the slot (500) is located inside the V-shaped extension plate (222).

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