Clamp type pipeline fastening and connecting device

Abstract

A clamp type pipeline fastening and connecting device comprises a fastening piece, a scale, pipe clamp bodies and a pipeline, and is characterized in that the pipe clamp bodies are symmetrically arranged on the two sides of a connecting flange, each pipe clamp body is of a semi-circular structure, the radial section of each pipe clamp body is of a groove-shaped structure, and the scale is arranged in the groove-shaped structure. The pipe clamp comprises two pipe clamp bodies, each pipe clamp body is provided with a groove, each groove is of an isosceles trapezoid structure with the long bottom edge being an opening, one end of each pipe clamp body is provided with a supporting component I, the other end of each pipe clamp body is provided with a supporting component II, the two pipe clamp bodies are buckled, and the supporting component I of one pipe clamp body is connected with the supporting component II of the other pipe clamp body in a buckled mode through a screw. The problems that manual screwing or wrench screwing cannot be selected, the screwing degree cannot be marked at the two ends of the pipe clamp body through a ruler, the screwing fastening degree cannot be represented through numerical values, a nut pressing groove limiting nut cannot be used, and a rubber protection layer cannot be used on the side wall of the pipe clamp body are effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline interfaces, in particular to a clamp-type pipeline fastening connection device. Background Art

[0002] The working principle of the clamp-type pipe fastening connection device mainly relies on the elasticity of the rubber material and the clamping effect of the clamp. It has good multiple sealing properties, convenient installation and maintenance, and safe and stable characteristics. This device can adapt to the pipe connection requirements of various complex working conditions and has played an important role in many fields such as waste heat recovery, coal, electricity, chemical industry and petroleum, and has been widely used. However, the existing clamp-type pipe fastening connection device cannot use two tightening methods: manual tightening handle and tightening with a matching wrench. When installing and removing the clamp-type pipe fastening connection device, it is not possible to choose between manual tightening and wrench tightening according to actual conditions. It is not possible to use a ruler to indicate the tightening degree at both ends of the clamp. It is not possible to use a numerical value to indicate the tightening degree, to ensure consistent tightening force at both ends of the clamp and to ensure consistent tightening force for a predetermined number of pipes. It is not possible to use a nut with a nut groove to limit the nut, to ensure stability and resistance to falling off during clamping and tightening, to use a rubber protective layer on the side wall of the pipe clamp body where it is clamped to the pipe, and to protect the outer wall of the pipe from damage during tightening.

[0003] Patent No. ZL202220051937.1 discloses a "clamp-type external threaded joint." The utility model comprises a first tube, a second tube, and a clamp. The clamp has a hinged end at one end and a connecting end at the other. The connecting end has two limiting slots, one of which is connected to a screw, which is threaded onto a fastener. A handle is movably mounted on the fastener. A drive block extending toward the fastener is disposed on the handle facing the fastener. Multiple drive blocks are arranged around the handle axis. The fastener has a first drive slot on the handle facing the fastener, into which each drive block is inserted. When each drive block is inserted into the first drive slot, the fastener and the handle are linked. A restrictor is provided between the handle and the fastener to prevent the handle from interlocking with the fastener. This utility model has the following advantages and effects: When the handle is linked to the rotating wheel, even if the handle is rotated, the fastener will not rotate. This prevents the fastener from losing its tightening effect and causing leakage due to improper rotation of the handle.

[0004] The invention patent with patent number ZL202222793064.4 discloses a "clamp-type smoke exhaust duct cleaning port sealing structure". The utility model includes a cover for closing the cleaning port and a fastening clamp for fixing the cover to the smoke exhaust duct. A first limiting ridge is provided on the outer side of the cover, and a second limiting ridge is provided on the outer side of the cleaning port. A limiting pressure groove is provided on the inner side of the fastening clamp. The first limiting ridge and the second limiting ridge are assembled with each other and embedded in the limiting pressure groove. When the fastening clamp is locked, the limiting pressure groove is simultaneously pressed on the first limiting ridge and the second limiting ridge, thereby pressing and sealing the cover on the cleaning port. Compared with the existing technology, the conventional bolt fixing is eliminated. The first limiting ridge and the second limiting ridge are respectively provided on the cover and the cleaning port. With the fastening clamp, the cleaning port can be quickly closed or opened by simply locking or loosening the fastening clamp, thereby improving the convenience and cleaning efficiency of daily cleaning of the smoke exhaust duct. Summary of the Invention

[0005] In order to solve the above technical problems, the utility model provides a clamp-type pipe fastening connection device, which is provided with a fastener, a pipe clamp body, a ruler, a scale and a rubber protective layer, etc., and uses two screwing methods, namely manual screwing of the handle and screwing with a matching wrench. When installing and disassembling the clamp-type pipe fastening connection device, manual or wrench screwing is selected according to actual conditions, and the degree of tightening of the screwing is indicated by a numerical value, the tightening force at both ends of the clamp is consistent, and the tightening force of a preset number of pipes is consistent. The nut groove limit nut is used, which is stable and not easy to fall off when clamped and tightened, and the outer wall of the pipe is protected from damage when tightening the pipe, effectively solving the above technical problems.

[0006] In order to achieve the above purpose, the technical solution adopted by the present invention to solve the technical problem is:

[0007] The clamp-type pipe fastening connection device comprises a fastener, a ruler, a pipe clamp body and a pipe, and is characterized in that:

[0008] The pipeline includes a connecting flange, and the pipe clamp body is symmetrically assembled on both sides of the connecting flange. The pipe clamp body is assembled into a semicircular ring structure, and the radial cross-section of the pipe clamp body is assembled into a groove-shaped structure. The shape of the groove is assembled into an isosceles trapezoidal structure with an open long bottom side. One end of the pipe clamp body is assembled with a support component I, and the other end of the pipe clamp body is assembled with a support component II;

[0009] The support component I is assembled into a U-shaped structure, and the support component I is hinged to one end of the screw by a cylindrical pin. The screw is threadedly connected to a fastener, and the fastener includes an internal nut, a side hole, a handle and a prismatic hole, which can be tightened manually or with the help of a matching wrench;

[0010] The supporting part I of one pipe clamp body is snap-connected with the supporting part II of the other pipe clamp body by means of a screw, and the two pipe clamp bodies are fastened together with the connecting flange by means of fasteners;

[0011] A ruler with a predetermined length along its axial direction is provided at a preset position on the surface of the screw rod, and a scale is assembled on the upper surface of the ruler. The values ​​of the scale can achieve the purpose of uniform tightening force at both ends of the pipe clamp body.

[0012] The support component II is assembled into a U-shaped structure, and the opening directions of the support component I and the support component II are assembled in opposite directions. The outer surface of the support component II is equipped with a nut pressing groove that matches the shape of the nut cross section, so as to achieve the purpose of stability and not easy to fall off after being locked and tightened.

[0013] The internal thread of the nut matches the external thread of the screw, the upper end of the nut is equipped with a handle, a side hole is opened in the middle position of the side of the handle, and a prismatic hole is equipped in the middle position of the top end of the handle, and the central axes of the nut, screw, handle and prismatic hole are consistent.

[0014] The pipe mouth end of the pipe is equipped with a connecting flange, which is an integrated structure in the shape of a cylinder and a frustum with an axial center through hole. The top surface of the cylinder is coplanar with the lower base surface of the frustum, and the top diameter of the cylinder is equal to the lower base diameter of the frustum. The upper base diameter of the frustum is equal to the outer diameter of the pipe. The axis of the cylinder and the axis of the frustum are concentric with the axis of the pipe. The height of the cylinder is equal to half the length of the short base side of the isosceles trapezoid of the pipe clamp groove; the busbar length of the frustum is equal to the waist length of the isosceles trapezoid of the pipe clamp groove, and the connecting flange portion corresponding to the busbar of the frustum constitutes the connecting portion of the connecting flange. When the pipe is connected and tightened by the connecting flange, the radial cross-section of the connecting portion of the two connecting flanges constitutes an isosceles trapezoidal convex structure. The size and shape of the isosceles trapezoidal convex structure match the size and shape of the isosceles trapezoidal groove structure of the radial cross-section of the pipe clamp, so as to achieve the purpose of dense engagement.

[0015] The surface of the isosceles trapezoidal groove of the pipe clamp body is fixedly equipped with a rubber protective layer, which serves the purpose of evenly applying force to the connecting flange during the clamping connection.

[0016] A rubber ring groove is mounted on the connecting end surface of the connecting flange, and a sealing rubber ring is mounted in the rubber ring groove.

[0017] A guide protrusion is installed on one side of the front end of the pipe, and the guide protrusion is installed in an arc-shaped structure with an arc angle of 5° to 180°. The other side corresponding to the guide protrusion is equipped with a guide groove. The size and shape of the guide protrusion match the size and shape of the guide groove. When the two pipes are connected, the guide protrusion of one pipe is tightly engaged in the guide groove of the other pipe.

[0018] The pipe clamp body, cylindrical pin, support component I, support component II and fasteners are all assembled with 304 stainless steel material.

[0019] The pipe clamp body, support component I and support component II adopt an integrally formed structure.

[0020] The beneficial effects of the utility model are:

[0021] The utility model is provided with a fastener, a handle and a prismatic hole corresponding thereto, etc., and can achieve two screwing modes, namely, manual screwing of the handle and screwing with a matching wrench. When installing and disassembling the clamp type pipe fastening connection device, manual screwing or screwing with a wrench can be selected according to actual conditions, which effectively solves the problem that two screwing modes cannot be used, namely, manual screwing of the handle and screwing with a matching wrench, and manual screwing or screwing with a wrench cannot be selected according to actual conditions when installing and disassembling the clamp type pipe fastening connection device.

[0022] The utility model is provided with a ruler, and a corresponding pipe clamp body, screw and scale, etc., which can use numerical values ​​to indicate the degree of tightening, the consistency of the tightening force at both ends of the clamp and the consistency of the tightening force of a preset number of pipes, and effectively solves the problem that a ruler cannot be used to indicate the degree of tightening at both ends of the clamp, and the problem that a ruler cannot be used to indicate the degree of tightening, the consistency of the tightening force at both ends of the clamp and the consistency of the tightening force of a preset number of pipes.

[0023] The utility model is provided with a nut pressing groove, and a corresponding supporting component II and a nut, etc., which can use the nut pressing groove to limit the nut, and is stable and not easy to fall off when clamped and tightened, effectively solving the problem that the nut pressing groove cannot be used to limit the nut, and is not stable and not easy to fall off when clamped and tightened.

[0024] The utility model is provided with a rubber protective layer, and corresponding upper pipe clamp body and lower pipe clamp body, etc., which can protect the outer wall of the pipe from being damaged when tightening the pipe, and effectively solves the problem that the rubber protective layer cannot be used on the side wall of the pipe clamp body at the pipe clamping position, and the outer wall of the pipe cannot be protected from being damaged when tightening the pipe.

[0025] The connecting flange connection portion of the utility model constitutes a waist trapezoidal protrusion structure, and the pipe clamp body is provided with a groove whose radial cross-section is an isosceles trapezoid, and its size and shape match it, which not only can achieve the purpose of dense clamping, but also gradually generates a uniform and stable axial force between the connecting flanges during the clamping and tightening process, uniformly compressing the sealing rubber ring provided between the connecting flanges, thereby achieving a good sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Attachment Figure 1 It is a structural diagram of the utility model;

[0027] Attachment Figure 2 This is a schematic diagram of the AA cross-sectional structure of the utility model;

[0028] Attachment Figure 3 This is a schematic diagram of the B-direction structure of the utility model;

[0029] Attachment Figure 4 This is a right side structural diagram of the pipe clamp body of the present invention;

[0030] Attachment Figure 5 It is a structural schematic diagram of the pipe body end of the utility model.

[0031] Legend:

[0032] 1. Fastener, 2. Ruler, 3. Pipe clamp body, 4. Pipe, 5. Support component I, 6. Support component II, 7. Cylindrical pin, 8. Screw, 9. Nut, 10. Side hole, 11. Handle, 12. Prismatic hole, 13. Scale, 14. Nut groove, 15. Rubber protective layer, 16. Connecting flange, 17. Cylinder, 18. Cone, 19. Rubber ring slot, 20. Sealing rubber ring, 21. Guide protrusion, 22. Guide groove. DETAILED DESCRIPTION

[0033] Combine Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 The present invention is further described in detail with examples so that the public can better understand the implementation method of the present invention. The specific implementation method of the present invention is as follows:

[0034] The clamp-type pipe fastening connection device comprises a fastener 1, a scale 2, a pipe clamp body 3 and a pipe 4, and is characterized in that:

[0035] The pipe 4 includes a connecting flange 16, and the pipe clamp body 3 is symmetrically assembled on both sides of the connecting flange 16. The pipe clamp body 3 is assembled into a semicircular ring structure, and the radial cross-section of the pipe clamp body 3 is assembled into a groove-shaped structure. The shape of the groove is assembled into an isosceles trapezoidal structure with an open long bottom side. One end of the pipe clamp body 3 is assembled with a support component I5, and the other end of the pipe clamp body is assembled with a support component II6;

[0036] The support member I5 is assembled into a U-shaped structure, and the support member I5 is hinged to one end of a screw rod 8 through a cylindrical pin 7. The screw rod 8 is threadedly connected to a fastener 1, and the fastener 1 includes an internal nut 9, a side hole 10, a handle 11, and a prismatic hole 12. When the tightening tension is light, the handle 11 is used to manually tighten the fastener 1. When the tightening tension is heavy, a matching wrench is used to tighten the fastener 1. In this way, two tightening methods are used. When installing and removing the clamp-type pipe fastening connection device, the fastener 1 can be tightened manually or with a wrench according to actual conditions.

[0037] The support member I5 of one pipe clamp body 3 is snap-connected to the support member II6 of the other pipe clamp body 3 by means of a screw 8, and the two pipe clamp bodies 3 are fastened together with the connecting flange 16 by means of a fastener 1;

[0038] A scale 2 of a predetermined length along its axial direction is provided at a preset position on the surface of the screw rod 8. A scale 13 is provided on the upper surface of the scale 2. The numerical value of the scale 13 can achieve the purpose of consistent tightening force at both ends of the pipe clamp body 3. When tightening the fastener 1, the scale value corresponding to the lower end of the nut 9 is observed, and the tightening degree of the tightening and the consistency of the tightening force at both ends of the pipe clamp body 3 are indicated by the numerical value. When tightening the same pipe 4, the tightening force is consistent.

[0039] The support component II6 is assembled into a U-shaped structure, and the opening directions of the support component I5 and the support component II6 are assembled in opposite directions. The outer surface of the support component II6 is equipped with a nut pressing groove 14 that matches the shape of the cross section of the nut 9, so as to achieve the purpose of stability and not easy to fall off after being fastened.

[0040] The internal thread of the nut 9 matches the external thread of the screw 8. The upper end of the nut 9 is equipped with a handle 11. A side hole 10 is opened in the middle position of the side of the handle 11. A prismatic hole 12 is equipped in the middle position of the top of the handle 11. The central axes of the nut 9, screw 8, handle 11 and prismatic hole 12 are consistent.

[0041] The pipe end of the pipe 4 is equipped with a connecting flange 16, and the connecting flange 16 is assembled into an integrated structure in the shape of a cylinder 17 and a frustum 18 with an axial center through hole. The top surface of the cylinder 17 is coplanar with the lower bottom surface of the frustum 18, and the top diameter of the cylinder 17 is equal to the lower bottom diameter of the frustum 18. The upper bottom diameter of the frustum 18 is equal to the outer diameter of the pipe 4. The axis of the cylinder 17 and the axis of the frustum 18 are concentric with the axis of the pipe 4. The height of the cylinder 17 is equal to half the length of the short base side of the isosceles trapezoid of the groove of the pipe clamp body 3; the busbar length of the frustum 18 is equal to the waist of the isosceles trapezoid of the groove of the pipe clamp body 3. The lengths are equal, and the connecting flange 16 portion corresponding to the busbar of the cone 18 constitutes the connecting portion of the connecting flange 16. When the pipe 4 is connected and tightened through the connecting flange 16, the radial cross-section of the connecting portion of the two connecting flanges 16 constitutes an isosceles trapezoidal convex structure. The size and shape of the isosceles trapezoidal convex structure match the size and shape of the isosceles trapezoidal groove structure of the radial cross-section of the pipe clamp body 3, which not only achieves the purpose of dense engagement, but also gradually generates a uniform and stable axial force on the connecting flange 16 during the process of engagement and tightening, more evenly compressing the sealing rubber ring 20 set between the connecting flanges 16, thereby achieving a good sealing effect.

[0042] The surface of the isosceles trapezoidal groove of the pipe clamp body 3 is fixedly mounted with a rubber protective layer 15 to achieve the purpose of evenly applying force to the connecting flange 16 during the clamping connection.

[0043] A rubber ring groove 19 is mounted on the connection end surface of the connection flange 16 , and a sealing rubber ring 20 is mounted in the rubber ring groove 19 .

[0044] A guide protrusion 21 is installed on one side of the front end of the pipe 4. The guide protrusion 21 is installed in an arc-shaped structure with an arc angle of 5° to 180°. The other side corresponding to the guide protrusion 21 is equipped with a guide groove 22. The size and shape of the guide protrusion 21 match the size and shape of the guide groove 22. When the two pipes 4 are connected, the guide protrusion 21 of one pipe 4 is tightly engaged in the guide groove 22 of the other pipe 4.

[0045] The pipe clamp body 3, the cylindrical pin 7, the supporting component I5, the supporting component II6 and the fastener 1 are all assembled with 304 stainless steel material.

[0046] The pipe clamp body 3, the supporting component I5 and the supporting component II6 adopt an integrally formed structure.

[0047] The working principle and working process of this utility model are as follows: Specific embodiment one:

[0048] When the clamp-type pipe fastening connection device is used to fasten the two waste heat recovery pipes 4, for the convenience of expression, the two waste heat recovery pipes 4 are called pipe I and pipe II, and the two exactly the same pipe clamp bodies 3 are called pipe clamp body I and pipe clamp body II. The staff takes out one pipe clamp body I and one pipe clamp body II, checks that there is no abnormality in their various components, loosens the fasteners 1 of the pipe clamp body I and the pipe clamp body II, and reserves space for the screw 8 and the fastener 1 for the next step of work. The connecting flange 16 of pipe II is connected to the connecting flange 16 of pipe I until the guide protrusion 21 of pipe II is fully inserted into the guide groove 22 of pipe I, and the guide groove 22 of pipe II is fully inserted by the guide protrusion 21 of pipe I. The sealing rubber rings 20 of the rubber ring grooves 19 on the connecting end faces of the two connecting flanges 16 are fully fitted, and the connecting flanges 16 are fully fitted. The above design is to fully buckle the pipe mouths of pipe I and pipe II, so that the connection between pipe I and pipe II is more secure. Tighten, the staff completely clamps the groove-shaped structure of the pipe clamp body I and the groove-shaped structure of the pipe clamp body II to the connection part of the two connecting flanges 16, and the radial cross-section of the connection part of the two connecting flanges 16 constitutes an isosceles trapezoidal convex structure. The size and shape of the isosceles trapezoidal convex structure match the size and shape of the isosceles trapezoidal groove structure of the radial cross-section of the pipe clamp body 3. The design not only achieves the purpose of dense clamping, but also gradually generates a uniform and stable axial force on the docking flange 16 during the clamping and tightening process, and more evenly compresses the sealing rubber ring 20 provided between the flanges 16 to achieve a good sealing effect. The support component I5 of the pipe clamp body I is connected to the support component II6 of the pipe clamp body II, and the screw 8 of the pipe clamp body I is sleeved on the support component II6 of the pipe clamp body II under the hinge of the cylindrical pin 7. The support component II6 is connected to the support component I5, and the screw 8 of the pipe clamp body II is sleeved on the support component II6 of the pipe clamp body I under the hinge of the cylindrical pin 7;

[0049] The staff pinches the handle 11 of the pipe clamp body I and tightens it until the lower end of the nut 9 is completely embedded in the nut pressing groove 14, and uses the nut pressing groove 14 to limit the nut 9, which is stable and not easy to fall off when it is engaged and tightened. Continue to pinch the handle 11 to tighten it. When it is tightened to a certain extent and manual tightening is more difficult, the staff uses a matching wrench to insert the prism of the wrench into the prismatic hole 12, and holds the handle to continue tightening, which fully alleviates the waste of manpower. The design of the fastener 1 achieves two screwing methods, namely manually screwing the handle 11 and using a matching wrench to screw. Manual or wrench screwing can be selected according to actual conditions. The tightening process of pinching the handle 11 of the pipe clamp body II by hand is the same as above. The order of tightening the fasteners 1 of the pipe clamp body I and the pipe clamp body II depends on the actual situation and will not be described in detail. Due to the radial cross-section of the two connecting flanges 16 and the radial cross-section of the pipe clamp body 3 The isosceles trapezoidal structure design of the surface is the same in size and shape. The tighter it is screwed, the groove-shaped structure of the pipe clamp body I and the pipe clamp body II squeezes the two connecting flanges 16 inward and the tighter the squeeze, the better the sealing performance of pipe I and pipe II, and the better leakage is prevented. The clamp of the clamp-type pipe fastening connection device adopts a split structure design, combined with the indication of the ruler 2 and the rubber protective layer 15, it is padded between the two pipes 4 and the clamp-type pipe fastening connection device. During the screwing process, the tightening force at both ends is consistent and the connecting flange 16 is evenly stressed. After the screwing work is completed, the staff observes the scale value of the scale 13 on the ruler 2 corresponding to the lower end of the nut 9, and uses a numerical value to indicate the degree of tightening of the screwing, so that when screwing the next same pipe 4, the tightening force of the screwing is consistent. From then on, the fastening connection work of pipe I and pipe II is completed. Specific embodiment two:

[0050] When performing maintenance work on the inside of pipes I and II that have been fastened together using the clamp-type pipe fastening connection device, since the clamp-type pipe fastening connection device has been used for a long time, the joints of the screw 8 and the fastener 1 of the pipe clamp body I and the pipe clamp body II are severely adhered, and it is difficult to twist them by manually twisting the handle 11. The staff uses a matching wrench, inserts the prism of the wrench into the prismatic hole 12, holds the handle to loosen it, and continues to twist and loosen it until it can be twisted manually. The staff then pinches the handle 11 with their fingers and continues to loosen it until the screw 8 can be unscrewed from the support component II6, separating the pipe clamp body I and the pipe clamp body II. The clamp-type pipe fastening connection device is detached from pipes I and II. The staff removes pipe II from pipe I, and performs maintenance on pipes I and II respectively. The disassembly of the clamp-type pipe fastening connection device is completed.

Claims

1. A clamp-type pipe fastening connection device, comprising a fastener (1), a scale (2), a pipe clamp body (3) and a pipe (4), characterized in that: The pipe (4) includes a connecting flange (16), the pipe clamp body (3) is symmetrically arranged on both sides of the connecting flange (16), the pipe clamp body (3) is configured as a semicircular ring structure, the radial cross-section of the pipe clamp body (3) is configured as a groove-shaped structure, the shape of the groove is configured as an isosceles trapezoidal structure with an open long bottom side, one end of the pipe clamp body (3) is provided with a support component I (5), and the other end of the pipe clamp body (3) is provided with a support component II (6); The support component I (5) is configured as a U-shaped structure, the support component I (5) is hinged to one end of a screw rod (8) via a cylindrical pin (7), the screw rod (8) is threadedly connected to a fastener (1), the fastener (1) comprising an inner nut (9), a side hole (10), a handle (11) and a prismatic hole (12), and can be screwed manually or with the aid of a matching wrench; The supporting component I (5) of one pipe clamp body (3) is snap-connected to the supporting component II (6) of the other pipe clamp body (3) by means of a screw (8), and the two pipe clamp bodies (3) are fastened together with the connecting flange (16) by means of a fastener (1); A scale (2) of a predetermined length along its axial direction is provided at a preset position on the surface of the screw rod (8), and a scale (13) is provided on the upper surface of the scale (2). The numerical value of the scale (13) can achieve the purpose of achieving a uniform tightening force at both ends of the pipe clamp body (3).

2. A clamp-type pipe fastening connection device according to claim 1, characterized in that: The support component II (6) is configured as a U-shaped structure, the opening directions of the support component I (5) and the support component II (6) are configured in opposite directions, and a nut pressing groove (14) matching the shape of the cross section of the nut (9) is provided on the outer surface of the support component II (6), so as to achieve the purpose of being stable and not easy to fall off after being fastened.

3. A clamp-type pipe fastening connection device according to claim 1, characterized in that: The internal thread of the nut (9) matches the external thread of the screw (8), the upper end of the nut (9) is provided with a handle (11), a side hole (10) is provided in the middle position of the side of the handle (11), and a prismatic hole (12) is provided in the middle position of the top end of the handle (11), and the central axes of the nut (9), the screw (8), the handle (11) and the prismatic hole (12) are consistent.

4. A clamp-type pipe fastening connection device according to claim 1, characterized in that: The pipe (4) is provided with a connecting flange (16) at the pipe end. The connecting flange (16) is provided as an integrated structure in the shape of a cylinder (17) with an axial center through hole and a truncated cone (18). The top surface of the cylinder (17) is coplanar with the bottom surface of the truncated cone (18). The top surface diameter of the cylinder (17) is equal to the bottom surface diameter of the truncated cone (18). The top surface diameter of the truncated cone (18) is equal to the outer diameter of the pipe (4). The axis of the cylinder (17), the axis of the truncated cone (18) and the axis of the pipe (4) are concentric. The height of the cylinder (17) is equal to the height of the pipe clamp body (3). ) is equal to half the length of the short base of the isosceles trapezoid of the groove; the busbar length of the truncated cone (18) is equal to the waist length of the isosceles trapezoid of the groove of the pipe clamp body (3); the portion of the connecting flange (16) corresponding to the busbar of the truncated cone (18) constitutes the connecting portion of the connecting flange (16); when the pipe (4) is connected and tightened through the connecting flange (16), the radial cross-section of the connecting portion of the two connecting flanges (16) constitutes an isosceles trapezoidal convex structure, and the size and shape of the isosceles trapezoidal convex structure match the size and shape of the isosceles trapezoidal groove structure of the radial cross-section of the pipe clamp body (3), thereby achieving the purpose of dense engagement.

5. The clamp-type pipe fastening connection device according to claim 1, characterized in that: A rubber protective layer (15) is fixedly provided on the surface of the isosceles trapezoidal groove of the pipe clamp body (3), which serves the purpose of evenly applying force to the connecting flange (16) during the clamping connection.

6. A clamp-type pipe fastening connection device according to claim 4, characterized in that: A rubber ring groove (19) is provided on the connection end surface of the connection flange (16), and a sealing rubber ring (20) is provided in the rubber ring groove (19).

7. The clamp-type pipe fastening connection device according to claim 1, characterized in that: A guide protrusion (21) is provided on one side of the front end of the pipe (4), and the guide protrusion (21) is provided as an arc structure with an arc angle of 5° to 180°. A guide groove (22) is provided on the other side corresponding to the guide protrusion (21), and the size and shape of the guide protrusion (21) match the size and shape of the guide groove (22). When the two pipes (4) are connected, the guide protrusion (21) of one pipe (4) is tightly engaged in the guide groove (22) of the other pipe (4).

8. A clamp-type pipe fastening connection device according to claim 7, characterized in that: The pipe clamp body (3), the cylindrical pin (7), the support component I (5), the support component II (6) and the fastener (1) are all made of 304 stainless steel.

9. The clamp-type pipe fastening connection device according to claim 8, characterized in that: The pipe clamp body (3), the supporting component I (5) and the supporting component II (6) adopt an integrally formed structure.

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