Pipe clamping and fixing device

Abstract

The utility model provides a pipe clamping and fixing device, which is used for clamping and fixing a product and comprises an internal assembly welding piece, an external assembly welding piece, a mandrel and a connecting square pipe, the internal assembly welding piece is mounted in the product and mounted on the mandrel, the external assembly welding piece is mounted outside the product, the connecting square pipe is mounted on the external assembly welding piece, and the mandrel is mounted on the connecting square pipe. The external assembly welding piece comprises an outer clamping ring and a connecting plate, the internal assembly welding piece comprises a comb tooth positioning ring, connecting channel steel and a central sleeve, and the internal assembly welding piece and the external assembly welding piece are located on the same cross section. Installation and welding operation of a product pipe and flat steel can be rapidly completed, and the internal assembly welding piece and the external assembly welding piece can achieve accurate control over the roundness of a product barrel pipe panel.

Description

TECHNICAL FIELD

[0001] The utility model relates to pipeline processing technical field especially relates to a pipe clamping and fixing device. BACKGROUND

[0002] The pipeline system of chemical products is often composed of pipes of multiple materials and different specifications. These pipes need to face the differences in thermal expansion coefficient, melting point and welding performance caused by material differences during the welding process, making the accurate control of welding parameters extremely complex. In addition, chemical pipelines often carry high-temperature, high-pressure and highly corrosive media, which requires the welded joints to have high strength and excellent sealing performance, as well as good corrosion resistance and fatigue resistance, which undoubtedly increases the difficulty of welding technology. SUMMARY

[0003] To overcome the above problems existing in the prior art, the utility model provides a pipe clamping and fixing device.

[0004] The utility model discloses a pipe clamping and fixing device for clamping and fixing products, which comprises an internal assembly welding part, an external assembly welding part, a mandrel and a connecting square tube. The internal assembly welding part is installed inside the product and on the mandrel. The external assembly welding part is installed outside the product. The connecting square tube is installed on the external assembly welding part. The external assembly welding part comprises an external snap ring and a connecting plate. The internal assembly welding part comprises a comb tooth positioning ring, a connecting channel steel and a center sleeve. The internal assembly welding part and the external assembly welding part are in the same cross section.

[0005] On this basis, the comb tooth positioning ring is in the shape of a whole circular ring and is equally divided into four 90-degree arcs. A whole circle of comb teeth is arranged on the comb tooth positioning ring. The comb teeth are installed in cooperation with the outer circle of the product pipe.

[0006] On this basis, the center sleeve is installed inside the comb tooth positioning ring. The connection and fixation between the center sleeve and the comb tooth positioning ring are realized through the connecting channel steel. The connecting channel steel is installed at the four 90-degree arc joint positions of the comb tooth positioning ring.

[0007] On this basis, the center sleeve and the comb tooth positioning ring are arranged at the same center.

[0008] On this basis, the external snap ring is provided as two half rings. A whole ring can be formed by the two external snap rings. The two external snap rings are connected and fixed by the connecting plate at the joint positions of the two ends.

[0009] On this basis, the mandrel and the connecting square tube are provided with an arc angle b. The logical relationship between the value of the angle b and the value of the product cylinder bending segment angle a is b=a+k, where k is a compensation angle, and the angle range is 0-5°.

[0010] On this basis, the distance between the two said comb teeth is the same as the pitch between the tubes in the product cylinder, which is S, the product tube is installed on the comb positioning ring, the diameter of the tube in the comb positioning ring is the same as the diameter of the central tube in the product cylinder, which is Φ2.

[0011] A size control method for manufacturing a bending cylinder tube screen by using the tube clamping and fixing device, comprising the following steps:

[0012] Step 1: according to the structure of the product, first determine the outer diameter Φ1 of the tube and the central diameter Φ2 of the tube in the cylinder, the pitch S between the tubes, select the comb positioning ring with the same size, secondly determine the straight sections L1 and L3 of the cylinder and the bending section L2 of the cylinder and the angle a° of the bending section of the cylinder, according to the material of the product tube and the bending angle a, determine the k compensation angle, determine the arc angle b in the mandrel and the connecting square tube, according to the straight sections L1 and L3 of the cylinder and the bending section L2 of the cylinder, determine the number of internal and external assembly welding parts, and determine the installation positions of L1 and L3 on the straight section, the installation positions of the internal and external assembly welding parts are L1' and L3', and the installation positions of the internal and external assembly welding parts on the bending section are L2',

[0013] Step 2: install the internal assembly welding part on the mandrel, install the product tube and the flat steel in sequence, complete the installation and forming operation of the product bending cylinder, the internal assembly welding part is connected and fixed with the product by spot welding, the product tube is welded and fixed with the flat steel by intermittent welding, the external assembly welding part is installed on the product cylinder, the installation position of the external assembly welding part is required to be in the same section as the internal assembly welding part, the external assembly welding part is connected and fixed with the product by spot welding, and the connecting square tube is installed on the external assembly welding part,

[0014] Step 3: when welding is performed on the inside of the product cylinder, first remove the mandrel, then remove the internal assembly welding part, complete the welding operation between the tubes and the flat steel inside and outside the product cylinder, and a bending cylinder tube screen is formed,

[0015] Step 4: without removing the external assembly welding part and the connecting square tube, the bending cylinder tube screen is put into the furnace for heat treatment process to eliminate the welding stress of the product, after the heat treatment of the bending cylinder tube screen is completed, the connecting square tube and the external assembly welding part on the product cylinder are removed,

[0016] Step 5: according to the structure of the product, draw a cylinder breaking line at the connection position of the straight section L1 and the bending section L2 of the cylinder, saw and cut the product cylinder into two sections, and rework the tube splicing bevel at the cylinder breaking position,

[0017] Step 6: horizontally place the product cylinder, measure the bending section angle b of the product cylinder in the current state, according to the bending section angle b, the corresponding connecting angle c of the cylinder straight section L1 is considered, the logical relationship is set as a=b+c, the connecting angle c is set as a correction adjustment angle, the cylinder straight section L1 and the bending section L2 are re-installed, the angle requirement satisfies a=b+c, and the cylinder straight section L1 and the bending section L2 are butt-welded.

[0018] On this basis, the size of L1', L3' in the step l is smaller than that of L1, L3, and the size of L2' is smaller than that of L2.

[0019] Compared with the prior art, the beneficial effects of the utility model are that: through adopting the internal assembly welding piece, the external assembly welding piece and the mandrel, the installation and welding operation of the product pipe and the flat steel can be quickly completed, the internal assembly welding piece and the external assembly welding piece can realize accurate control of the product cylinder pipe screen roundness, through the arc angle b on the mandrel and the connecting square tube and k as a compensation angle, the product arc angle b+k is close to the requirement of the product cylinder bending angle a; after subsequent product cylinder heat treatment, the connecting position of the product cylinder straight section L1 and the bending section L2 is disconnected through the real object, the product cylinder straight section L1 and the bending section L2 are re-installed, the angle requirement satisfies a=b+c, wherein the connecting angle c is set as a correction adjustment angle, the bending angle of a kind of bending cylinder product can be accurately processed and manufactured, the product manufacturing cycle is significantly shortened while the product quality is ensured; the utility model has the advantages of simple design, low manufacturing cost, convenient use, high universality and practicality, and is convenient for large-scale use in production workshops. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a main view structural schematic diagram of a bending cylinder pipe screen product;

[0021] Figure 2 It is a side view structural schematic diagram of a bending cylinder pipe screen product;

[0022] Figure 3 It is a main view structural schematic diagram of a pipe clamping and fixing device;

[0023] Figure 4 It is a side view structural schematic diagram of a pipe clamping and fixing device;

[0024] Figure 5 It is a main view structural schematic diagram of a pipe clamping and fixing device and product installation;

[0025] Figure 6 It is a side view structural schematic diagram of a pipe clamping and fixing device and product installation;

[0026] Figure 7 It is a side view structural schematic diagram of a pipe clamping and fixing device and product installation;

[0027] Figure 8 Figure 1 is a side view of the pipe clamping and fixing device and the product removing internal assembly welding part structure schematic diagram;

[0028] Figure 9 Figure 2 is a front view of the pipe clamping and fixing device and the product removing internal assembly welding part structure schematic diagram;

[0029] Figure 10 Figure 3 is a schematic diagram of the connection structure of the straight section L1 and the curved section L2 of the cylinder;

[0030] Figure 11 Figure 4 is a schematic diagram of the cylinder disconnection line drawn at the connection position of the straight section L1 and the curved section L2 of the cylinder;

[0031] Figure 12 Figure 5 is a schematic diagram of the curved cylinder tube screen product disconnection and subsequent size control steps;

[0032] In the figure: 0, product, l, comb tooth positioning ring, 2, connecting channel steel, 3, center sleeve, 4, mandrel, 5, outer clasp, 6, connecting plate, 7, connecting square tube. DETAILED DESCRIPTION

[0033] The utility model will be further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model and do not limit the utility model.

[0034] At present, the company launches a kind of chemical container product 0, reference Figure 1 And Figure 2 Product structure features are as follows: product is designed as a curved cylinder shape, wherein the cylinder is composed of pipe and flat steel assembly welding into cylindrical shape, wherein the outer diameter of pipe is set as: Φl;Φl Value range: 28mm~80mm, the center diameter of cylindrical body is set as: Φ2;Φ2 Value range: 2.5m~5m. S is the pitch between pipe and pipe in cylindrical body;Its value range: 60mm~200mm.

[0035] Product 0 is set as a curved cylinder structure, the length of straight section of cylinder is set as L1, L3;The curved section of cylinder is set as L2;The angle of curved section of cylinder is set as a °, the angle range of a: l0~50 °.

[0036] For this kind of structure form chemical container product 0, first, pipe and flat steel welding process, it is prone to deformation, so that the roundness of cylindrical section is difficult to control. Secondly, for this kind of structure form chemical container product, the angle a of curved section of cylinder is prone to deformation in subsequent manufacturing process, it is difficult to guarantee the bending angle of cylinder, affect product quality and production progress.

[0037] The utility model discloses a kind of pipe clamping and fixing devices, for clamping and fixing product 0, including internal assembly welding piece, external assembly welding piece, mandrel 4 and connecting square tube 7, internal assembly welding piece is installed in product 0 inside, and it is installed on mandrel 4, external assembly welding piece is installed in product 0 outside, connecting square tube 7 is installed on external assembly welding piece, external assembly welding piece includes outer snap ring 5 and connecting plate 6, internal assembly welding piece includes comb tooth positioning ring l, connecting channel steel 2 and center sleeve 3.

[0038] Comb tooth positioning ring l is whole circular ring shape, and is divided into four 90 degrees arcs, whole circle comb tooth is equipped on comb tooth positioning ring l, and comb tooth is installed between product 0 pipe outer circle cooperation.

[0039] Center sleeve 3 is installed in comb tooth positioning ring l inside, and the connection between center sleeve 3 and comb tooth positioning ring l is realized by four connecting channel steels 2, connecting channel steel 2 is installed at four 90 degrees arc joint position of comb tooth positioning ring l, and center sleeve 3 and comb tooth positioning ring l are arranged in the same center.

[0040] In the embodiment, 7 internal assembly welding pieces are provided, which are all installed on mandrel 4, and are fixed by welding between parts, and the internal assembly welding pieces are installed in chemical container product 0 inside, and are fixed by spot welding connection,

[0041] Outer snap ring 5 is provided as two half rings, and an integral ring can be formed by two outer snap rings 5, and the two ends of the two outer snap rings 5 are connected and fixed by connecting plate 6.

[0042] In the embodiment, 7 external assembly welding pieces are provided, which are installed on chemical container product 0, and are fixed by spot welding between parts, characterized in that the 7 external assembly welding pieces are installed on the outside of the chemical container product 0 and are in the same section as the 7 internal assembly welding pieces, the number of connecting square tubes 7 is 6, and they are circumferentially distributed on the 7 external assembly welding pieces, and are fixed by welding between parts.

[0043] Mandrel 4 and connecting square tube 7 are provided with arc angle b, and the logical relationship between the angle value b and the angle value a of the curved section of the product 0 cylinder is b=a+k, k is a compensation angle, and the angle range is 0-5°.

[0044] The distance between the two combs is the same as the pitch between the pipes in the product 0 cylinder, and is S, the product 0 pipe is installed on the comb tooth positioning ring l, and the pipe diameter in the comb tooth positioning ring l is the same as the diameter of the central pipe of the product 0 cylinder, and is Φ2.

[0045] A method for controlling the size of a curved cylinder tube screen, comprising the following steps:

[0046] Step l: according to the structure of product 0, first determine the outer diameter of the pipe Φl and the center diameter of the cylinder Φ2, the pitch S between the pipes, select the same size of the comb positioning ring l, secondly determine the straight section L1, L3 of the cylinder and the bending section L2 of the cylinder and the bending angle a° of the cylinder, according to the pipe material and bending angle a of product 0, determine the k compensation angle, determine the arc angle b of the mandrel 4 and the connecting square tube 7, according to the straight section L1, L3 of the cylinder and the bending section L2 of the cylinder, determine the number of internal and external assembly welding parts, which are all seven in this embodiment, 2 are arranged on the straight section of the cylinder respectively, 3 are arranged on the bending section of the cylinder, and the installation positions of L1, L3 of the internal and external assembly welding parts are set as L1', L3', the installation positions of the internal and external assembly welding parts on the bending section are set as L2', the size of L1', L3' is smaller than that of L1, L3, and the size of L2' is smaller than that of L2, and the straight section L1, L3 of the cylinder is left with a margin for subsequent machining,

[0047] Step 2: refer to Figures 3-6 , install the internal assembly welding part on the mandrel 4, install the product 0 pipe and the flat steel in turn, complete the bending cylinder installation and forming operation of product 0, the internal assembly welding part is fixed by spot welding between product 0, the product 0 pipe and the flat steel are welded and fixed by intermittent welding, the external assembly welding part is installed on the product 0 cylinder, the installation position of the external assembly welding part requires being in the same section as the internal assembly welding part, the external assembly welding part is fixed by spot welding between product 0, and the connecting square tube 7 is installed on the external assembly welding part,

[0048] Step 3: refer to Figure 7 , Figure 8 and Figure 9 , when welding is performed on the inside of the product 0 cylinder, first remove the mandrel 4, then remove the internal assembly welding part, complete the welding operation between the pipe and the flat steel inside and outside the product 0 cylinder, a bending cylinder pipe screen welding forming,

[0049] Step 4: without removing the external assembly welding part and the connecting square tube 7, the bending cylinder pipe screen enters the furnace for heat treatment process, to eliminate the welding stress of product 0, after the heat treatment of the bending cylinder pipe screen is completed, remove the connecting square tube 7 and the external assembly welding part on the product 0 cylinder,

[0050] Step 5: refer to Figure 10 and Figure 11 , according to the structure of product 0, draw a cylinder breaking line at the connection position of the straight section L1 and the bending section L2 of the cylinder, saw off the product 0 cylinder into two sections, and reprocess the pipe splicing bevel at the cylinder breaking position,

[0051] Step 6: refer to Figure 12, product 0 cylinder horizontal ground, measure product 0 cylinder real current state under the angle of bending section b, according to the bending section angle b, the corresponding consideration cylinder straight section L1 butt joint angle c, logical relationship is set as: a=b+c, butt joint angle c is set as the correction adjustment angle, re-arrange installation cylinder straight section L1 and bending section L2, angle requirement satisfies a=b+c, complete cylinder straight section L1 and bending section L2 butt joint welding joint seam.

[0052] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front", "central", "both ends" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0053] In the utility model, unless otherwise explicitly specified and limited, the terms "mounting", "setting", "connecting", "fixing", "screw connection", "pad setting" and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integrated; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise explicitly limited, the person skilled in the art can understand the specific meaning of the above terms in the utility model according to the specific situation.

[0054] The above description shows and describes the preferred embodiments of the utility model, as described above, it should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the utility model concept described herein by the above teaching or related technology or knowledge. The modification and change made by the person skilled in the art without departing from the spirit and scope of the utility model should be within the protection scope of the claims attached to the utility model.

Claims

1. A pipe clamping fixture for clamping and securing a product (0), characterized by: It comprises an internal assembly, an external assembly, a mandrel (4) and a connecting square tube (7), the internal assembly is installed inside the product (0) and on the mandrel (4), the external assembly is installed outside the product (0), the connecting square tube (7) is installed on the external assembly, the external assembly comprises an outer snap ring (5) and a connecting plate (6), the internal assembly comprises a comb positioning ring (1), a connecting channel steel (2) and a center sleeve (3), the internal assembly and the external assembly are in the same section.

2. The pipe chucking fixture of claim 1, wherein: The comb positioning ring (1) is a whole circular ring shape and is equally divided into four 90-degree arcs, a whole circle of combs is arranged on the comb positioning ring (1), and the combs are installed in cooperation with the outer circle of the product (0) pipe.

3. The pipe chucking fixture of claim 2, wherein: The center sleeve (3) is installed inside the comb positioning ring (1), the connection and fixation between the center sleeve (3) and the comb positioning ring (1) are realized through the connecting channel steel (2), and the connecting channel steel (2) is installed at the four 90-degree arc joint positions of the comb positioning ring (1).

4. The pipe chucking fixture of claim 3, wherein: The center sleeve (3) and the comb positioning ring (1) are arranged at the same center.

5. The pipe chucking device of claim 4, wherein: The outer snap ring (5) is provided as two half rings, an integral ring can be formed by the two outer snap rings (5), and the two outer snap rings (5) are connected and fixed by the connecting plate (6) at the joint positions of the two ends.

6. The pipe chucking device of claim 5, wherein: The mandrel (4) and the connecting square tube (7) are provided with an arc angle b, and the logical relationship between the angle value b and the angle value a of the curved section of the product (0) cylinder is b=a+k, k is a compensation angle, and the angle range is 0-5°.

7. The pipe chucking device of claim 6, wherein: The distance between the two combs is the same as the pitch between the pipes in the product (0) cylinder, which is S, the pipes of the product (0) are installed on the comb positioning ring (1), and the pipe diameter in the comb positioning ring (1) is the same as the diameter of the central pipe of the product (0) cylinder, which is Φ2.

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