Quick sealing and pressing device for PE (Poly Ethylene) pipeline

Abstract

The utility model belongs to the field of pipeline detection equipment, and provides a PE pipeline rapid sealing and pressing device which comprises a blind plate sealing head, a pressing pipe and a pressure gauge, a hand valve is arranged at the position, close to a connecting port, of the pressing pipe, split hoops are arranged outside a pipeline to be detected and connected through connecting bolts, and the pressure gauge is connected with the blind plate sealing head. A hoop opening groove is formed in the inner ring of the split hoop, a pressing flange is arranged in the hoop opening groove, a sealing head protruding ring which is located in the hoop opening groove and is in butt joint with the pressing flange is arranged at the end of the blind plate sealing head, a sealing rubber ring is arranged between the butt joint faces of the sealing head protruding ring and the pressing flange, and the sealing rubber ring and a pipeline to be detected are nested. The end socket convex ring is of a step-shaped structure, one step face of the end socket convex ring is in face-to-face fit with the end face of the to-be-detected pipeline, and the end of the to-be-detected pipeline is provided with a flower-mouth spring in elastic fit with the blind plate end socket. The device is reasonable in design, simple in structure, good in sealing performance, beneficial for improving pressure measuring accuracy and suitable for large-scale popularization.

Description

Technical Field

[0001] The utility model belongs to the field of pipeline detection equipment, and in particular relates to a PE pipeline rapid sealing and pressing device. Background Art

[0002] Before the newly laid PE pipeline is put into operation, the pipeline system should be tested for strength and tightness in accordance with relevant regulations. The length of the PE pipeline pressure test shall not exceed 1,000 meters, and the road and river sections shall be pressure tested separately. For the PE pipeline pressure test, the commonly used method is to weld the heads at both ends of the pipeline to be pressure tested to install the pressure gauge, whether it is welding electric fusion sleeves at both ends of the pipeline, or welding steel-plastic conversion joints to connect steel heads. These methods of installing pressure gauges require special welding equipment. For secondary use, the heads must be cut and removed, ground, and then welded for reuse. The process is complicated and time-consuming, resulting in a certain amount of waste.

[0003] The existing patent CN212745421U discloses a temporary pipe plugging device, which includes a pipe clamp detachably fixed on the pipe, a pipe A connected to the pipe clamp at one end and used to plug the pipe mouth, and a blind plate connected to the other end of the pipe A and used to plug the pipe A. The device can solve the temporary plugging of the pipe and the problem of purging and threading of water accumulation detected by the gyroscope in the water-accumulated pipe. On the one hand, it realizes the non-welding plugging of the pipe without cutting the pipe, reduces the investment cost and improves the efficiency; on the other hand, the device can be reused, and can be effectively applied to various pipe diameters by configuring the accessories suitable for the pipe diameter. However, in actual use, the tensioning effect and sealing of the transition part between the pipe mouth and the device are not good, which affects the accuracy of the pressure test; furthermore, the pressure-maintaining process lacks effective valve control. If the pressure switch is relied on alone, it will also affect the accuracy of the pressure gauge's detection of the internal pressure of the pipe. Utility Model Content

[0004] In view of the technical problems existing in the above-mentioned sealing device, the utility model proposes a PE pipeline rapid sealing and pressure-pressing device which has reasonable design, simple structure, good sealing performance and is conducive to improving the pressure measurement accuracy.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows: a PE pipeline rapid sealing and pressure device provided by the utility model comprises a blind plate head, the blind plate head is used to be arranged at the end of the pipeline to be tested, the blind plate head is provided with a connecting port, a pressure pipe is provided at the connecting port, a pressure gauge is provided on the pressure pipe, a hand valve is provided on the pressure pipe at a position close to the connecting port, a split clamp is provided on the outside of the pipeline to be tested, the split clamp is connected by connecting bolts, the inner ring of the split clamp is provided with a clamp mouth groove, a pressure flange is provided in the clamp mouth groove, a head convex ring located in the clamp mouth groove and connected with the pressure flange is provided at the end of the blind plate head, a sealing rubber ring is provided between the butt surface of the head convex ring and the pressure flange, the sealing rubber ring is nested with the pipeline to be tested, the head convex ring is a stepped structure and one of its stepped surfaces is face-to-face matched with the end face of the pipeline to be tested, and a flower spring elastically matched with the blind plate head is provided at the end of the pipeline to be tested.

[0006] Preferably, the cross-section of the pressure flange is L-shaped and its end is nested with another stepped surface of the head convex ring, and the sealing rubber ring is arranged between the pressure flange and the stepped surface of the head convex ring.

[0007] Preferably, the split clamp is provided with a plurality of bolt holes connected to the clamp mouth grooves on the side facing away from the blind plate head, and clamping bolts are provided in the bolt holes, and the ends of the clamping bolts abut against the back side of the pressure flange.

[0008] Preferably, the cross-section of the flower spring is V-shaped and a U-shaped flower spring is provided on its peripheral surface facing the blind plate head.

[0009] Preferably, the cross section of the sealing rubber ring is a double mushroom head structure and a transition section is provided between the mushroom heads, and the width of the transition section is smaller than the width of the mushroom heads.

[0010] Compared with the prior art, the advantages and positive effects of the utility model are:

[0011] 1. The utility model provides a PE pipe rapid sealing and pressure device, which uses a head convex ring to cooperate with the end of the pipe to be tested, so that the pipe to be tested and the device have a good transition surface, and the use of a pressure flange and a sealing rubber ring can effectively improve the sealing of the device and the pipe to be tested, and the flower spring is used to ensure that the pipe to be tested and the device have a certain tension, which is conducive to improving the accuracy of the pressure gauge pressure measurement; by setting a hand valve near the connection port of the pressure pipe, the air pressure opening can be reasonably controlled, which is also conducive to the pressure gauge pressure measurement accuracy. The device has a reasonable design, simple structure, good sealing and is conducive to improving the accuracy of pressure measurement, and is suitable for large-scale promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0013] Figure 1 A cross-sectional view of a PE pipe rapid sealing and pressing device provided in an embodiment;

[0014] Figure 2 A front view of a split clamp provided in an embodiment;

[0015] Figure 3 A left side view of a split clamp provided in an embodiment;

[0016] Figure 4 A cross-sectional view of a flange provided in an embodiment;

[0017] Figure 5 A cross-sectional view of a blind plate end cap provided in an embodiment;

[0018] Figure 6 An axonometric view of a flower harp provided in an embodiment;

[0019] Figure 7 A cross-sectional view of a sealing rubber ring provided in an embodiment;

[0020] In the above figures, 1. pipeline to be tested; 2. blind plate end cap; 21. connection port; 22. end cap convex ring; 3. pressure pipe; 4. pressure gauge; 5. hand valve; 6. split clamp; 61. clamp mouth groove; 62. bolt hole; 7. connecting bolt; 8. pressure flange; 9. sealing rubber ring; 91. mushroom head; 92. transition section; 10. flower spring; 101. U-shaped flower mouth; 11. clamping bolt. DETAILED DESCRIPTION

[0021] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict. For the convenience of description, if the words "upper", "lower", "left" and "right" appear below, they only indicate that the upper, lower, left and right directions are consistent with the drawings themselves, and do not limit the structure.

[0022] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0023] Examples, such as Figures 1 to 7 As shown, the utility model provides a PE pipeline rapid sealing and pressure device, including a blind plate head 2, the blind plate head 2 is used to be arranged at the end of the pipeline to be tested 1, the blind plate head 2 is provided with a connection port 21, the connection port 21 is provided with a pressure pipe 3, and the pressure pipe 3 is provided with a pressure gauge 4. The outer end of the pressure pipe 3 is connected to the gas source, and is used to pressurize the pipeline 1 to be tested. On this basis, the pressure tube 3 provided by the utility model is provided with a hand valve 5 at a position close to the connecting port 21, and a split clamp 6 is provided on the outside of the pipeline to be tested 1, and the split clamp 6 is connected by a connecting bolt 7. The inner ring of the split clamp 6 is provided with a clamp mouth groove 61, and a pressure flange 8 is provided in the clamp mouth groove 61. The end of the blind plate head 2 is provided with a head convex ring 22 located in the clamp mouth groove 61 and connected with the pressure flange 8. A sealing rubber ring 9 is provided between the connecting surfaces of the head convex ring 22 and the pressure flange 8. The sealing rubber ring 9 is nested with the pipeline to be tested 1, the head convex ring 22 is a stepped structure and one of its stepped surfaces is surface-to-surface matched with the end face of the pipeline to be tested 1, and the end of the pipeline to be tested 1 is provided with a flower spring 10 elastically matched with the blind plate head 2.

[0024] Specifically, by setting a hand valve 5 near the connection port 21 of the pressure-pressing pipe 3, the air pressure opening can be reasonably controlled, especially in the process of maintaining pressure, the opening of the flow in the direction of the pressure-pressing pipe 3 can be reduced, and the pressure measuring passage of the pressure gauge 4 is not blocked, which is beneficial to the pressure measuring accuracy of the pressure gauge 4. Furthermore, the head convex ring 22 provided by the device is stepped to achieve surface-to-surface matching with the end of the pipeline 1 to be measured, so that the pipeline 1 to be measured and the device have a better transition surface, and the pressure flange 8 and the sealing rubber ring 9 are used to seal the overflow surface of the airflow, and the multi-section surface design of the hoop groove 61 effectively improves the sealing performance of the device and the pipeline 1 to be measured. Furthermore, the flower spring 10 can increase the tension of the pipeline 1 to be measured and the device, which is beneficial to ensure the matching performance of the pipeline 1 to be measured with the blind plate head 2, the sealing rubber ring 9 and the pressure flange 8, and further improve the accuracy of the pressure measurement of the pressure gauge 4.

[0025] In order to improve the measurement accuracy of the device, the cross section of the pressure flange 8 provided by the utility model is an L-shaped structure, and its end is nested with another stepped surface of the head convex ring 22, and the sealing rubber ring 9 is arranged between the pressure flange 8 and the stepped surface of the head convex ring 22. When the pressure flange 8 and the head convex ring 22 are nested, the sealing rubber ring 9 generates compression on the nesting surface of the two to achieve a better seal, which not only ensures the stability of the inner structure of the split hoop 6, but also ensures a better sealing performance, thereby reducing the possible measurement error of the device.

[0026] In order to improve the utilization rate of the split clamp 6, the utility model not only designs the clamp mouth groove 61 to effectively position the pressure flange 8 and the blind plate head 2, but also, the split clamp 6 is provided with a plurality of bolt holes 62 connected with the clamp mouth groove 61 on the side facing away from the blind plate head 2, and a clamping bolt 11 is provided in the bolt hole 62, and the end of the clamping bolt 11 abuts against the back of the pressure flange 8. By designing an adjustable clamping bolt 11, the specific position of the pressure flange 8 in the clamp mouth groove 61 can be adjusted, further ensuring that the pressure flange 8 can establish a good sealing assembly relationship with the head convex ring 22 and the sealing rubber ring 9.

[0027] In order to improve the elastic compression performance of the flower spring 10, the cross section of the flower spring 10 provided by the utility model is V-shaped and a U-shaped flower mouth 101 is arranged on the peripheral surface facing the blind plate head 2. The U-shaped flower mouth 101 can ensure that its edge has a certain elastic deformation ability and can effectively contact with the blind plate head 2 of different curvatures, so that the blind plate head 2 and the pipeline 1 to be tested have a certain tension after assembly.

[0028] In order to improve the sealing performance of the sealing rubber ring 9, the cross section of the sealing rubber ring 9 provided by the utility model is a double mushroom head structure and a transition section 92 is provided between the mushroom heads 91, and the width of the transition section 92 is smaller than the width of the mushroom heads 91. In this way, when the sealing rubber ring 9 is compressed by the pressure flange 8 and the head convex ring 22, its edge can produce a certain elastic deformation, thereby filling the nesting surface of the pressure flange 8 and the head convex ring 22, and effectively pressing on the outer wall of the pipeline 1 to be tested, thereby establishing a better sealing relationship.

[0029] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A PE pipe rapid sealing and pressure device, comprising a blind plate head, the blind plate head is used to be arranged at the end of the pipe to be tested, the blind plate head is provided with a connection port, the connection port is provided with a pressure pipe, and the pressure pipe is provided with a pressure gauge, characterized in that: The pressure-pressing pipe is provided with a hand valve at a position close to the connecting port, a split clamp is provided on the outside of the pipeline to be tested, the split clamp is connected by connecting bolts, the inner ring of the split clamp is provided with a clamp mouth groove, a pressure flange is provided in the clamp mouth groove, the end of the blind plate head is provided with a head convex ring located in the clamp mouth groove and connected with the pressure flange, a sealing rubber ring is provided between the connecting surfaces of the head convex ring and the pressure flange, the sealing rubber ring is nested with the pipeline to be tested, the head convex ring is a stepped structure, and one of its stepped surfaces is in surface-to-surface cooperation with the end face of the pipeline to be tested, and the end of the pipeline to be tested is provided with a flower spring elastically matched with the blind plate head.

2. A PE pipe rapid sealing and pressing device according to claim 1, characterized in that: The cross section of the pressure flange is L-shaped and its end is nested with another stepped surface of the head convex ring. The sealing rubber ring is arranged between the pressure flange and the stepped surface of the head convex ring.

3. A PE pipe rapid sealing and pressing device according to claim 2, characterized in that: The split clamp is provided with a plurality of bolt holes connected with the clamp mouth grooves on the side facing away from the blind plate head, and clamping bolts are provided in the bolt holes, and the ends of the clamping bolts are in contact with the back side of the pressure flange.

4. A PE pipe rapid sealing and pressing device according to claim 3, characterized in that: The cross section of the flower spring is V-shaped and a U-shaped flower spring is arranged on the peripheral surface facing the blind plate head.

5. A PE pipe rapid sealing and pressing device according to claim 4, characterized in that: The cross section of the sealing rubber ring is a double mushroom head structure and a transition section is arranged between the mushroom heads. The width of the transition section is smaller than the width of the mushroom heads.

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