Pressure gauge bent pipe clamp

Abstract

The utility model provides a pressure gauge bend pipe clamp, including support subassembly, clamping subassembly, fixed die subassembly, moving die subassembly, handle subassembly, mandrel subassembly, support subassembly includes datum plate, clamping subassembly includes pipe clamp, fixed die subassembly includes fixed die, moving die subassembly includes front moving die mandrel, rear moving die mandrel, front moving die wheel, rear moving die wheel, the mandrel subassembly includes the datum plate, the pipe clamp includes the pipe clamp, the fixed die subassembly includes the fixed die, the rear moving die subassembly includes the rear moving die wheel. The handle assembly comprises a handle front plate and a handle rear plate, and the mandrel assembly comprises a movable mandrel and a fixed insertion core. According to the utility model, the movable mandrel is connected and matched with the datum plate, so that the front movable mold wheel is switched between the fixed mold and the movable mold; the handle front plate and the handle rear plate are selectively hinged or fixedly connected through the fixed insertion core, the relative position of the front movable die wheel and the rear movable die wheel is adjusted, and arc bending of the pressure gauge bent pipe is achieved. The pressure gauge bending machine is suitable for both thin-walled pipes and thick-walled pipes, high in bending efficiency and suitable for bending pressure gauge bent pipes in slightly complex shapes.

Description

Technical Field

[0001] The utility model relates to the field of pressure gauge elbows, and particularly relates to a pressure gauge elbow clamp. Background Art

[0002] A pressure gauge elbow is a fitting used to connect a pressure gauge with a pressure gauge measuring device or pipeline, which is used to buffer the instantaneous impact of the measured medium on the pressure gauge bourdon tube and can also reduce the temperature of the measured medium, and is a device for protecting the pressure gauge.

[0003] Common pressure gauge elbows are in the shape of O, U, etc. The forming methods of pressure gauge elbows can be divided into manual bending forming and machining bending forming. Manual bending can basically be applied to all specifications of pressure gauge elbows, and various shapes of pressure gauge elbows can be processed according to the form of manual dies, such as bending the two ends of the pipe into arcs. A common method for bending a pressure gauge elbow with uniform arcs at both ends is to add two wheel dies. This method requires multiple disassembly and assembly of the wheel dies, and the processing process is inconvenient, affecting the operation efficiency. At the same time, due to manual operation, this elbow bending method is mostly used for thin-walled pipes.

[0004] Both thin-walled and thick-walled pipes can be bent by machining. Its advantages are fast speed, high efficiency and labor saving; the disadvantage is that this method is only suitable for bending pipes with relatively simple shapes, such as straight sections at both ends of the pipe, and cannot process pressure gauge elbows with more complex shapes, such as pressure gauge elbows with uniform arcs at both ends.

[0005] Therefore, a pressure gauge elbow clamp that is convenient for bending pressure gauge elbows with relatively complex shapes (with uniform arcs at both ends) is needed. Content of the Utility Model

[0006] The purpose of the utility model is to provide a pressure gauge elbow clamp, which solves the technical problems that existing machining cannot bend pressure gauge elbows with complex shapes, and manual bending of pressure gauge elbows with complex shapes has low efficiency and is not applicable to thick-walled pipes pointed out in the background art.

[0007] To achieve the above object, the present utility model provides a pressure gauge elbow clamp, which includes a support assembly, a clamping assembly, a fixed mold assembly, a moving mold assembly, a handle assembly, and a mandrel assembly. The support assembly includes a reference plate, the clamping assembly includes a pipe clamp, the fixed mold assembly includes a fixed mold, the moving mold assembly includes a front moving mold mandrel, a rear moving mold mandrel, a front moving mold wheel, and a rear moving mold wheel, the handle assembly includes a front handle plate and a rear handle plate, and the mandrel assembly includes a movable mandrel and a fixed insert core. A first limit and a second limit are provided on the reference plate. The pipe clamp is fixed to one end of the reference plate. The fixed mold is arranged in the middle of the reference plate. The front moving mold wheel is arranged on the front moving mold mandrel, and the rear moving mold wheel is arranged on the rear moving mold mandrel. The fixed mold is connected to one end of the front handle plate, and the rear handle plate is connected to the other end of the front handle plate. The front moving mold mandrel is arranged at the connection end of the front handle plate and the rear handle plate, and the rear moving mold mandrel is arranged on the rear handle plate. The movable mandrel is movably arranged in the front moving mold mandrel and can be selectively connected to the first limit or the second limit. The fixed insert core is arranged adjacent to the front moving mold mandrel at the connection end of the front handle plate and the rear handle plate. When the fixed insert core is inserted, the front handle plate and the rear handle plate are fixedly connected. When the fixed insert core is not inserted, the front handle plate and the rear handle plate are hinged.

[0008] Further, the front moving mold wheel is arranged on the front moving mold mandrel through a front moving mold bearing, and the rear moving mold wheel is arranged on the rear moving mold mandrel through a rear moving mold bearing.

[0009] Further, a large bearing is arranged on the front handle plate, and the fixed mold is connected to the large bearing.

[0010] Further, a fixed insert core is arranged on the rear handle plate, and the handle assembly further includes a handle grip, which is fixed to the rear handle plate.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows: by the connection and cooperation of the movable mandrel and the reference plate, the front moving mold wheel is switched between the fixed mold and the moving mold; by the fixed insert core, the front handle plate and the rear handle plate are selectively hinged or fixedly connected, so as to adjust the relative positions of the front moving mold wheel and the rear moving mold wheel, and realize the arc bending of the pressure gauge elbow. The overall volume of the present utility model is small and the operation is convenient. It can be applied to both thin-walled pipes and thick-walled pipes, and can bend arcs with complex shapes more conveniently; most of the structures are fixed by plug pins, and there is no process of fixing the mold with a loose nut, which improves the processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is an exploded schematic view of the present utility model;

[0013] Figure 2Schematic diagram of the overall structure of the present utility model;

[0014] Figure 3 Exploded schematic diagram of the moving die assembly and the handle assembly;

[0015] Figure 4 Schematic diagram of the bent pipe of the present utility model, showing the first stage of the bent pipe;

[0016] Figure 5 Schematic diagram of the bent pipe of the present utility model, showing the second stage of the bent pipe;

[0017] Figure 6 Schematic diagram of the bent pipe of the present utility model, showing the third stage of the bent pipe;

[0018] Figure 7 The pressure gauge bent pipe after bending and forming;

[0019] In the figure, 1, reference plate; 2, movable mandrel; 3, fixed die; 4, pressure gauge bent pipe; 5, pipe clamp; 6, handle grip; 7, handle rear plate; 8, handle front plate; 9, front moving die mandrel; 10, rear moving die mandrel; 11, fixing bolt; 12, bearing gland; 13, fixed core insert; 14, front moving die bearing; 15, rear moving die bearing; 16, front moving die wheel; 17, rear moving die wheel; 18, large bearing; 19, gland screw; 20, first limit; 21, connection hole; 22, second limit; 23, upper part, 24 middle part, 25, lower part; 26, boss; 27, hinge hole; 28, rectangular groove; 29, fixing hole; 30, stepped hole; 31, front moving die mandrel hole; 32, core insert hole; 33, rear moving die mandrel hole. Specific embodiments

[0020] In order to make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and illustrated herein can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the present utility model to be protected, but merely represents the selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the scope of protection of the present utility model.

[0022] It should be noted that like reference numerals and letters denote like items in the following figures, and thus, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0023] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the figures, or the orientation or positional relationship in which the present utility model is habitually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0024] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging vertically, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0025] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and limited, the terms "arranged", "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0026] The following will, with reference to the accompanying drawings, elaborate on some embodiments of the present utility model.

[0027] See in detail the attached Figure 1-3 For a quick die-changing tooling of a screw press according to the present utility model, it includes a support assembly, a clamping assembly, a fixed die assembly, a moving die assembly, a mandrel assembly, and a handle assembly. The support assembly includes a reference plate 1. The reference plate 1 is square, and a stepped connection hole 21 is provided at the center. A first limit 20 and a second limit 22 are provided on both sides of the connection hole 21. The first limit 20 is a stepped hole, and the second limit 22 is a limit boss.

[0028] The clamping assembly includes a pipe clamp 5. The pipe clamp 5 is fixed at the other end of the reference plate 1, adjacent to the second limit 22. The upper half of the pipe clamp 5 is smoothed to avoid interference with other components when the steel pipe is bent.

[0029] The fixed mold assembly includes a fixed mold 3, which has a middle part 24 with spiral grooves, a cylindrical upper part 23 and a lower part 25, and bolt holes are arranged inside. The lower part 25 of the fixed mold 3 is arranged in the connection hole 21 on the reference plate 1, and a bolt (not shown) is inserted into the central hole of the fixed mold 3 and screwed into the connection hole 21 on the reference plate 1 to fix the fixed mold 3 on the reference plate 1.

[0030] The moving mold assembly includes a front moving mold core shaft 9, a rear moving mold core shaft 10, a front moving mold wheel 16, and a rear moving mold wheel 17. Both the front moving mold core shaft 9 and the rear moving mold core shaft 10 are cylindrical, and convex platforms 26 are arranged at the bottoms. Concave arc surfaces are arranged on the outer circumferences of the front moving mold wheel 16 and the rear moving mold wheel 17. The front moving mold wheel 16 is arranged at the lower end of the front moving mold core shaft 9, and the rear moving mold wheel 17 is arranged at the lower end of the rear moving mold core shaft 10. The front moving mold wheel 16 and the rear moving mold wheel 17 are in clearance fit with the front moving mold core shaft 9 and the rear moving mold core shaft 10 respectively. Therefore, the front moving mold wheel 16 and the rear moving mold wheel 17 can rotate on the front moving mold core shaft 9 and the rear moving mold core shaft 10. Preferably, a front moving mold bearing 14 is arranged between the front moving mold wheel 16 and the front moving mold core shaft 9, and a rear moving mold bearing 15 is arranged between the rear moving mold wheel 17 and the rear moving mold core shaft 10. Openings are arranged at the bottoms of the front moving mold wheel 16 and the rear moving mold wheel 17, and the front moving mold bearing 14 and the rear moving mold bearing 15 are respectively inserted from the bottoms of the front moving mold wheel 16 and the rear moving mold wheel 17. The bearing and the mold wheel are in interference fit. The front moving mold bearing 14 and the rear moving mold bearing 15 make the front moving mold wheel 16 and the rear moving mold wheel 17 roll more smoothly without jamming. The front moving mold core shaft 9, the front moving mold bearing 14, and the front moving mold wheel 16 form the front moving mold, and the rear moving mold core shaft 10, the rear moving mold bearing 15, and the rear moving mold wheel 17 form the rear moving mold.

[0031] The handle assembly includes a front handle plate 8 and a rear handle plate 7. The front handle plate 8 is square-shaped, and a hinge hole 27 is provided at the right end. The rear handle plate 7 is also generally square-shaped, and a rectangular groove 28 is provided on the left end side. The right end of the front handle plate 8 is arranged in the rectangular groove 28 at the left end of the rear handle plate 7. The hinge hole 27 is aligned with the front moving die core shaft hole 31. The front moving die core shaft 9 is inserted into the front moving die core shaft hole 31 from below the rear handle plate 7 to hinge the front handle plate 8 and the rear handle plate 7 together. The rear moving die core shaft 10 is inserted into the rear moving die core shaft hole 33 from below the rear handle plate 7. The upper part 23 of the fixed die 3 is connected to the left end of the front handle plate 8. In a preferred solution, a stepped hole 30 is provided at the left end of the front handle plate 8, and a large bearing 18 is arranged in the stepped hole 30. The large bearing 18 is fixed in the stepped hole 30 by interference fit, and the upper part 23 of the fixed die 3 is inserted into the middle hole of the large bearing 18. A bearing gland 12 is arranged above the large bearing 18, and the bearing gland 12 is fixed to the upper end face of the front handle plate 8 by gland screws 19 to hold the large bearing 18 in the stepped hole 30. Further, the handle assembly further includes a handle grip 6, and the handle grip 6 is connected to the front end of the rear handle plate 7 by a fixing bolt 11. The handle grip 6 is convenient for holding and is more labor-saving when bending the pipe.

[0032] The core shaft assembly includes a movable core shaft 2 and a fixed core insert 13. The movable core shaft 2 is cylindrical and is movably inserted into the central hole of the front moving die core shaft 9. During the process of bending the pipe, the lower end of the movable core shaft 2 can be selectively inserted into the first limit 20 or the second limit 22. The fixed core insert 13 is T-shaped and is arranged adjacent to the front moving die core shaft 9 at the connection end of the front handle plate 8 and the rear handle plate 7. Specifically, a fixing hole 29 adjacent to the hinge hole 27 is further provided on the right end of the front handle plate 8, and a core insert hole 32 adjacent to the front moving die core shaft hole 31 is provided on the left end of the rear handle plate 7. Since the front handle plate 8 and the rear handle plate 7 are hinged together by the front moving die core shaft 9, rotate the rear handle plate 7 to align the core insert hole 32 with the fixing hole 29, insert the fixed core insert 13 from the core insert hole 32, and lock it into the fixing hole 29, so as to change the hinge connection between the front handle plate 8 and the rear handle plate 7 into a fixed connection, and the fixed core insert 13 is selectively inserted or not inserted according to needs.

[0033] When the pipe needs to be bent, assemble the support assembly, clamping assembly, moving die assembly, core shaft assembly, and handle assembly as described above. Fix the reference plate 1 on the vise table or fix it to a suitable workbench surface with screws. Remove the fixed core insert 13 to make the front handle plate 8 and the rear handle plate 7 in a hinged state. Place one end of the pipe to be bent into the pipe clamp 5 and clamp it firmly. Pass the movable core shaft 2 through the central hole of the front moving die core shaft 9 and insert it into the second limit 22 on the reference plate 1. Fix the front moving die wheel 16 to be used as the fixed die, adjust the position of the rear moving die wheel 17, and rotate the handle grip in the direction shown in the attachment Figure 4 and use the rear moving die wheel 17 to contact the steel pipe and perform pipe bending.

[0034] After the bending of the first arc is completed, fix the fixed mold 3 on the reference plate 1, remove the movable mandrel 2, adjust the handle front plate 8 and the handle rear plate 7 so that the fixing hole 29 on the handle front plate 8 is aligned with the core inserting hole 32 on the handle rear plate 7. Insert the fixed core 13 to fix the handle front plate 8 and the handle rear plate 7, so that the handle front plate 8 and the handle rear plate 7 are linked. Lift the handle grip 6 in the direction shown in the appendix Figure 5 Keep the front and rear movable molds in the same direction, and bend the steel pipe along the reserved groove direction in the middle 24 of the fixed mold 3. The steel pipe will be bent upward along the reserved groove. At this time, the front and rear movable molds are designed to be movable, and the front and rear movable molds will clamp the bent pipe and move upward synchronously during bending.

[0035] Finally, remove the fixed core 13 to restore the hinge connection between the handle front plate 8 and the handle rear plate 7. Adjust the handle rear plate 7 so that the whole rear movable mold is on the left side of the steel pipe, and the front movable mold is still on the right side of the steel pipe. Pass the movable mandrel 2 through the central hole of the front movable mold core 9 and insert it into the first limit 20 on the reference plate 1 to fix the movable mold for use as a fixed mold. Rotate the handle grip 6 to the right in the direction shown in the appendix Figure 6 to complete the forming of the last bend. The formed pressure gauge elbow 4 after bending is as shown in the appendix Figure 7 shown.

[0036] The utility model is suitable for bending products of pressure gauge elbows with slightly complex shapes (with uniform arcs at both ends of the product), and the mold does not need to be disassembled and assembled multiple times during the bending process, so the efficiency is relatively high.

[0037] The above describes the basic principles and advantages of the present utility model. For those skilled in the art, the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit it. Although the present utility model has been described in detail with reference to the foregoing embodiments, after reading this specification, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features therein. Without departing from the concept of the present utility model, any obvious replacement is within the protection scope of the present utility model.

Claims

1. A pressure gauge bending fixture, comprising a support assembly, a clamping assembly, a fixed mold assembly, a movable mold assembly, a handle assembly, and a mandrel assembly, wherein the support assembly comprises a reference plate (1), the clamping assembly comprises a pipe clamp (5), the fixed mold assembly comprises a fixed mold (3), the movable mold assembly comprises a front movable mold mandrel (9), a rear movable mold mandrel (10), a front movable mold wheel (16), and a rear movable mold wheel (17), the handle assembly comprises a handle front plate (8), a handle rear plate (7), and the mandrel assembly comprises a movable mandrel (2) and a fixed insert (13), characterized in that: The reference plate (1) is provided with a first limit position (20) and a second limit position (22); the tube clamp (5) is fixed to one end of the reference plate (1); the fixed mold (3) is arranged in the middle of the reference plate (1); the front movable mold wheel (16) is arranged on the front movable mold core shaft (9); the rear movable mold wheel (17) is arranged on the rear movable mold core shaft (10); the fixed mold (3) is connected to one end of the handle front plate (8); the handle rear plate (7) is connected to the other end of the handle front plate (8); the front movable mold core shaft (9) is arranged at the connection end of the handle front plate (8) and the handle rear plate (7). The rear movable mold core shaft (10) is arranged on the handle rear plate (7), the movable core shaft (2) is movably arranged in the front movable mold core shaft (9), and can be selectively connected to the first limit (20) or the second limit (22), the fixed insert (13) is adjacent to the front movable mold core shaft (9) and is arranged at the connection end of the handle front plate (8) and the handle rear plate (7), when the fixed insert (13) is inserted, the handle front plate (8) and the handle rear plate (7) are fixedly connected, and when the fixed insert (13) is not inserted, the handle front plate (8) and the handle rear plate (7) are hinged.

2. A pressure gauge bending fixture according to claim 1, characterized in that: The front movable die wheel (16) is arranged on the front movable die core shaft (9) via a front movable die bearing (14), and the rear movable die wheel (17) is arranged on the rear movable die core shaft (10) via a rear movable die bearing (15).

3. A pressure gauge bending fixture according to claim 2, characterized in that: A large bearing (18) is provided on the handle front plate (8), and the fixed mold (3) is connected to the large bearing (18).

4. A pressure gauge bending fixture according to claim 3, characterized in that: The handle assembly further comprises a handle grip (6), and the handle grip (6) is fixed on the handle rear plate (7).

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