Clamp for machining valve rod of pneumatic control valve

Abstract

The utility model discloses a pneumatic control valve rod machining clamp which comprises a base, a sliding groove, a sliding table, a supporting seat, a sliding block, a moving mechanism, a stud, a motor, an air cylinder, a sliding plate, a limiting mechanism, a first limiting seat, a second limiting seat, an anti-skid clamping ring, a limiting shaft, a crank, a clamping head, an adjusting mechanism, idler wheels and a trapezoidal seat. A sliding table is fixedly connected to the middle of the upper end of the base, supporting seats are arranged on the front portion and the rear portion of the upper end of the sliding table, the lower end of the supporting seat at the front end is fixedly connected to the upper end of the sliding table, a sliding block is fixedly connected to the middle of the lower end of the supporting seat at the rear end, and a moving mechanism is arranged on the sliding block. The upper end of the air cylinder is fixedly connected with a sliding plate. Compared with the prior art, the valve rod fixing device has the advantages that valve rods of different sizes can be conveniently fixed, and the valve rods can be fixed more stably.

Description

Technical Field

[0001] The utility model relates to the technical field of valve processing, in particular to a clamp for processing a valve stem of a pneumatic control valve. Background Art

[0002] Pneumatic control valves refer to various pneumatic components that control the pressure, flow rate and flow direction of airflow in pneumatic systems and ensure the normal operation of pneumatic actuators or mechanisms. The structure of a pneumatic control valve can be decomposed into two parts: the valve body (including the valve seat and valve hole, etc.) and the valve core. According to the relative position of the two, there are two types: normally closed and normally open. Water and other resources used in people's daily lives are mainly transported by pipelines. In order to ensure safe transportation, pneumatic control valves are used in the delivery pipelines used for liquid supply to control them. The pneumatic control valve is opened and closed by the valve stem, and the production quality of the valve stem is also crucial.

[0003] Authorization announcement number CN208132477U describes a special positioning fixture for machining radial pin holes of valve stems, which relates to a special positioning fixture, specifically to a special positioning fixture for machining radial pin holes of valve stems. The utility model is to solve the problem that it is difficult to ensure the vertical position accuracy of the pin hole axis when machining valve stem pin holes on a radial drilling machine. The utility model includes a positioning seat, a support seat, a pressure plate and two set screws. The positioning seat and the support seat are arranged side by side, one end of the valve stem is arranged on the positioning seat, and the other end of the valve stem is arranged on the support seat. The pressure plate is horizontally arranged above one end of the valve stem, and the pressure plate is connected to the positioning seat by two set screws. The utility model belongs to the field of mechanical processing, but the prior art still has defects:

[0004] 1. In the prior art, one end of the valve stem is arranged on the positioning seat, and the other end of the valve stem is arranged on the supporting seat. Only one end of the valve stem is fixed in position by a pressure plate and two set screws, and the fixation of the valve stem is not stable enough.

[0005] 2. When replacing a processed valve stem in the prior art, two set screws need to be removed, and then a new valve stem needs to be installed to fix it. This is not convenient for replacement, and it is not easy to clamp and fix valve stems of different lengths. Utility Model Content

[0006] The technical problem to be solved by the utility model is to overcome the above-mentioned defects and provide a clamp for machining a valve stem of a pneumatic control valve.

[0007] In order to solve the above technical problems, the technical solution provided by the utility model is: a fixture for processing the valve stem of a pneumatic control valve, comprising a base, a sliding groove is opened in the middle of the upper end of the base, a slide is fixedly connected to the middle of the upper end of the base, support seats are arranged in front and behind the upper end of the slide, the lower end of the support seat is fixedly connected to the upper end of the slide at the front end, and a sliding block is fixedly connected to the middle of the lower end of the support seat at the rear end, a moving mechanism is arranged on the sliding block, a cylinder is fixedly connected to the lower end of the support seat, a sliding block is fixedly connected to the upper end of the cylinder, a limiting mechanism is arranged on the sliding block, an anti-slip clamp ring is fixedly connected to the upper end of the sliding block, limiting shafts are fixedly connected to both sides of the upper end of the support seat, a crank is sleeved on the limiting shaft, a clamping head is fixedly connected to the upper end of the crank, and an adjusting mechanism is arranged at the lower end of the crank.

[0008] As an improvement, the moving mechanism includes a stud inserted in the middle of the slide groove, the stud is threadedly connected to the middle of the slider, the rear end of the base is fixedly connected to a motor, and the front end output shaft of the motor is fixedly connected to the rear end of the stud.

[0009] As an improvement, the limiting mechanism includes a limiting seat 1 and a limiting seat 2 fixedly connected to the upper and lower ends inside the support seat, and the limiting seat 1 and the limiting seat 2 are sleeved on the slide plate.

[0010] As an improvement, the adjustment mechanism includes a roller rotatably connected to the lower end of the crank, a trapezoidal seat is fixedly sleeved in the middle of the slide plate, and the roller is in rolling contact with the side surface of the trapezoidal seat.

[0011] The advantages of the utility model compared with the prior art are: 1. The utility model is provided with two support seats at the front and rear ends, and the internal structures of the two support seats are the same. The anti-slip clamping ring and the clamping head on the support seats can stably clamp the valve stem, and stably clamp the front and rear ends of the valve stem to ensure the accuracy and stability of the valve stem drilling.

[0012] 2. In the utility model, the distance between the front and rear end support seats is adjusted according to the length of the valve stem. The motor drives the stud to rotate, and the rotation of the stud drives the slider to move forward and backward, thereby driving the rear end support seat to move forward and backward, and adjusting the distance between the front end support seat, so as to facilitate the clamping and fixation of the front and rear ends of valve stems of different lengths. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The utility model is a structural schematic diagram of a clamp for machining a valve stem of a pneumatic control valve.

[0014] Figure 2 The utility model is a left sectional view of a fixture for machining a valve stem of a pneumatic control valve.

[0015] Figure 3 The utility model is a schematic diagram of the internal structure of a support seat of a fixture for processing a valve stem of a pneumatic control valve.

[0016] Figure 4 yes Figure 3 Schematic cross-section of .

[0017] As shown in the figure: 1. Base; 2. Slide; 3. Slide; 4. Support seat; 5. Slider; 6. Moving mechanism; 61. Stud; 62. Motor; 7. Cylinder; 8. Slide plate; 9. Limiting mechanism; 901. Limiting seat one; 902. Limiting seat two; 10. Anti-slip clamping ring; 11. Limiting shaft; 12. Crank; 13. Clamping head; 14. Adjusting mechanism; 141. Roller; 142. Trapezoidal seat. DETAILED DESCRIPTION

[0018] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0019] A fixture for processing a valve stem of a pneumatic control valve comprises a base 1, a slide groove 2 is provided in the middle of the upper end of the base 1, a slide table 3 is fixedly connected to the middle of the upper end of the base 1, a slot hole matching the slide groove is also provided in the middle of the slide table 3, support seats 4 are provided at the front and rear ends of the upper end of the slide table 3, the support seat 4 at the front end is fixedly connected to the slide table 3, and the support seat 4 at the rear end is slidably connected to the slide table 3.

[0020] A slider 5 is fixedly connected to the middle of the lower end of the rear end support seat 4, and a moving mechanism 6 is arranged on the slider 5. The moving mechanism 6 includes a stud 61 inserted in the middle of the inner part of the slide groove 2. The stud 61 passes through the slider 5 and is threadedly connected to the slider 5. A motor 62 is fixedly connected to the rear end of the base 1. The front end output shaft of the motor 62 is fixedly connected to the rear end of the stud 61. The motor 62 can drive the stud 61 to rotate. The rotation of the stud 61 drives the slider 5 to move forward and backward, thereby driving the rear end support seat 4 to move forward and backward, and adjusting the distance between the slider and the front end support seat 4, so as to facilitate the clamping and fixing of the front and rear ends of valve stems of different lengths.

[0021] A cylinder 7 is fixedly connected to the lower end of the support seat 4, and a slide plate 8 is fixedly connected to the upper end of the cylinder 7. A limiting mechanism 9 is arranged on the slide plate 8. The limiting mechanism 9 includes a limiting seat 1 901 and a limiting seat 2 902 fixedly connected to the upper and lower ends of the support seat 4. The limiting seat 1 901 and the limiting seat 2 902 are respectively sleeved on the upper and lower ends of the slide plate 8. The cylinder 7 can drive the slide plate 8 to move up and down under the limitation of the limiting seat 1 901 and the limiting seat 2 902.

[0022] An anti-skid clamp ring 10 is fixedly connected to the upper end of the slide plate 8, and the slide plate 8 moves up and down to drive the anti-skid clamp ring 10 to move up and down.

[0023] The upper ends of the support seat 4 are fixedly connected with the limit shaft 11 on both sides, and the limit shaft 11 is sleeved with a special-shaped crank 12, and the upper end of the crank 12 is fixedly connected with a cylindrical clamping head 13, and the lower end of the crank 12 is provided with an adjustment mechanism 14, and the adjustment mechanism 14 includes a roller 141 rotatably connected to the lower end of the crank 12, and the slide plate 8 is fixedly sleeved with a trapezoidal seat 142 in the middle, and the roller 141 is in rolling contact with the side of the trapezoidal seat 142. When the cylinder 7 drives the slide plate 8 to move upward, the trapezoidal seat 142 moves upward, driving the rollers 141 on both sides to move along the trapezoidal seat 1 The inclined surfaces on both sides of 42 slide away from each other, thereby driving the lower ends of the cranks 12 on both sides away from each other. At this time, the cranks 12 rotate around the limit shaft 11, and the upper ends of the cranks 12 on both sides approach each other, driving the clamping heads 13 on both sides to approach each other, and the anti-slip clamp ring 10 also moves upward under the drive of the slide plate 8. At this time, the anti-slip clamp ring 10 and the clamping heads 13 on both sides approach each other to clamp the valve stem, and the anti-slip clamp ring 10 and the clamping heads 13 on both sides can clamp valve stems of different sizes. It is easy to use and has stable clamping, thereby ensuring the stability and drilling quality of the valve stem.

[0024] When the utility model is implemented, Figure 1-4 As shown, when in use, the distance between the front and rear end support seats 4 is adjusted according to the length of the valve stem, and the motor 62 is started to drive the stud 61 to rotate. The rotation of the stud 61 drives the slider 5 to move forward, thereby driving the rear end support seat 4 to move forward, and adjusting the distance between the front end support seat 4, so as to facilitate the clamping and fixation of the front and rear ends of the valve stems of different lengths.

[0025] After the spacing between the front and rear end support seats is adjusted, the valve stem is placed on the upper end of the anti-slip clamp ring 10 on the front and rear end support seats 4, and the cylinder 7 is started to drive the slide plate 8 to move upward, and the trapezoidal seat 142 moves upward, driving the rollers 141 on both sides to slide away from each other along the inclined surfaces on both sides of the trapezoidal seat 142, thereby driving the lower ends of the cranks 12 on both sides to move away from each other. At this time, the crank 12 rotates around the limit shaft 11, and the upper ends of the cranks 12 on both sides approach each other, driving the clamping heads 13 on both sides approach each other, and the anti-slip clamp ring 10 also moves upward driven by the slide plate 8. At this time, the anti-slip clamp ring 10 and the clamping heads 13 on both sides approach each other to clamp the valve stem, and the anti-slip clamp ring 10 and the clamping heads 13 on both sides can clamp valve stems of different sizes. It is easy to use and has stable clamping, which ensures the stability and drilling quality of the valve stem drilling.

[0026] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.

Claims

1. A fixture for machining a valve stem of a pneumatic control valve, comprising a base (1), characterized in that: A slide groove (2) is provided in the middle of the upper end of the base (1); a slide table (3) is fixedly connected to the middle of the upper end of the base (1); a support seat (4) is provided at the front and rear ends of the upper end of the slide table (3); the lower end of the support seat (4) is fixedly connected to the upper end of the slide table (3) at the front end; a slider (5) is fixedly connected to the middle of the lower end of the support seat (4) at the rear end; a moving mechanism (6) is provided on the slider (5); a cylinder (7) is fixedly connected to the lower end of the support seat (4); a slide plate (8) is fixedly connected to the upper end of the cylinder (7); a limiting mechanism (9) is provided on the slide plate (8); an anti-slip clamp ring (10) is fixedly connected to the upper end of the slide plate (8); limiting shafts (11) are fixedly connected to both sides of the upper end of the support seat (4); a crank (12) is sleeved on the limiting shaft (11); a clamping head (13) is fixedly connected to the upper end of the crank (12); an adjustment mechanism (14) is provided at the lower end of the crank (12).

2. A fixture for machining a valve stem of a pneumatic control valve according to claim 1, characterized in that: The moving mechanism (6) comprises a stud (61) inserted in the middle of the slide groove (2), the stud (61) is threadedly connected to the middle of the slider (5), the rear end of the base (1) is fixedly connected to a motor (62), and the front end output shaft of the motor (62) is fixedly connected to the rear end of the stud (61).

3. The fixture for machining a valve stem of a pneumatic control valve according to claim 1, characterized in that: The limiting mechanism (9) comprises a limiting seat 1 (901) and a limiting seat 2 (902) which are fixedly connected to the upper and lower ends inside the supporting seat (4); the limiting seat 1 (901) and the limiting seat 2 (902) are sleeved on the slide plate (8).

4. The fixture for machining a valve stem of a pneumatic control valve according to claim 1, characterized in that: The adjusting mechanism (14) comprises a roller (141) rotatably connected to the lower end of the crank (12); a trapezoidal seat (142) is fixedly sleeved in the middle of the slide plate (8); and the roller (141) is in rolling contact with the side surface of the trapezoidal seat (142).

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