A quick-connect flange device for valve installation

Abstract

The present invention discloses a quick-connect flange device for valve installation, including a flange body, a clamping assembly, a front sealing assembly and a rear sealing assembly. The flange body is installed on a pipe through the clamping assembly, and the flange body and the flange of the valve are connected by bolts; the two ends of the flange body are respectively sealed and connected to the pipe through the front sealing assembly and the rear sealing assembly. The clamping assembly of the present invention enables the flange body to be tightly connected to the pipe, and the front sealing assembly and the rear sealing assembly enable reliable sealing between the flange body and the pipe. At this time, the valve flange and the flange body installed on the pipe can be directly connected by bolts. On the one hand, the operation is simple and convenient, and there is no need to connect to the power supply. At the same time, it can be operated with water and does not require professional equipment, which is efficient, improves quality, and saves energy and reduces consumption; on the other hand, the required operating space is small and the amount of earthwork is small; finally, it can be applied to non-metallic material pipelines or metal material pipelines, with a wide range of applications and suitable for large-scale promotion.

Description

Technical Field

[0001] The invention relates to the technical field of valve installation devices, and more particularly to a quick-connect flange device for valve installation. Background Art

[0002] At present, when installing valves on hot and cold water pipelines such as HVAC and tap water, there are some problems whether it is a metal pipe that needs to be welded or a non-metallic pipe such as PE that needs to be hot-melt connected: on the one hand, a whole set of special equipment is required, and it needs to be operated with electricity and must be operated without water. Even if there is only a trace of moisture in the pipe fittings, it will cause unreliable connection at the joints and easily cause leakage, especially hot-melt pipe fittings. Once leakage occurs, they have to be cut off and scrapped, and cannot be reused. New pipe fittings need to be welded, which is very wasteful; on the other hand, it is usually necessary to weld the whole pipe fittings. Water must be passed through the pipeline to detect the sealing of the welds and hot-melt joints. Once a leak occurs somewhere, the entire pipeline must be shut down and the water must be drained before repairing, which is time-consuming, labor-intensive and costly. In addition, valve installation requires a sufficiently large operating space, a large amount of earth excavation, high construction costs, complex operations, high technical requirements, and requires professional operators to operate. Finally, the existing quick connectors are lacking in sealing, pressure-bearing capacity and service life, and are only suitable for temporary and very low-pressure occasions. There is no structure that can be used for hot-melt pipes made of non-metallic materials such as PE, and can also be used for metal material pipes.

[0003] Therefore, it is an urgent problem to be solved by those skilled in the art to provide a quick-connect flange device for valve installation that is simple to operate and has reliable sealing. Summary of the invention

[0004] In view of this, the present invention provides a quick-connect flange device for valve installation, which is simple and convenient to operate, has reliable sealing, and can greatly improve installation efficiency.

[0005] In order to achieve the above object, the present invention adopts the following technical solution:

[0006] A quick-connect flange device for valve installation comprises a flange body, a clamping assembly, a front sealing assembly and a rear sealing assembly. The flange body is installed on a pipe through the clamping assembly, and the flange body is connected to the flange of the valve through bolts; the two ends of the flange body are respectively sealed and connected to the pipe through the front sealing assembly and the rear sealing assembly.

[0007] By adopting the above scheme, the beneficial effects of the present invention are:

[0008] The clamping assembly enables the flange body to be tightly connected to the pipe, and the front sealing assembly and the rear sealing assembly ensure a reliable seal between the flange body and the pipe. At this time, the valve flange and the flange body installed on the pipe can be directly connected by bolts. On the one hand, the operation is simple and convenient, and there is no need to connect to the power supply. At the same time, it can be operated with water and does not require professional equipment, which is efficient, improves quality, and saves energy and reduces consumption. On the other hand, the required operating space is small and the amount of earthwork is small. Finally, it can be used on non-metallic material pipelines or metal material pipelines, has a wide range of applications, and is suitable for large-scale promotion.

[0009] Furthermore, the clamping assembly includes a gear ring and a clamping screw, a step groove is provided between the main body of the flange body and the tube, and the flange body has a radial threaded hole; the inner wall of the gear ring has a serrated groove along the circumferential direction; and the gear ring has an axial through groove; the gear ring is installed in the step groove, and the serrated groove is in contact with the tube; the clamping screw is screwed into the radial threaded hole of the flange body and abuts against the outer wall of the gear ring.

[0010] The beneficial effect of adopting the above further technical solution is to ensure that the toothed ring grips the pipe so that the flange body can be tightly connected to the pipe.

[0011] Furthermore, the clamping assembly also includes a sealing screw and a first O-ring, the clamping screw having an axial through hole; the flange body having a sealing hole at the top of the radial threaded hole; the sealing screw is screwed into the radial threaded hole and clamps the clamping screw; the first O-ring is installed in the upper outer diameter groove of the sealing screw and is located in the sealing hole.

[0012] The beneficial effects of adopting the above-mentioned further technical solution are as follows: on the one hand, the clamping screw is locked to prevent it from loosening, thereby ensuring that the gear ring grasps the pipe more reliably; on the other hand, sealing is achieved at the radial threaded holes of the flange body; thirdly, the sealing effect can be tested on site to ensure that the pipeline is successfully installed and water is passed through in one installation, thereby avoiding rework.

[0013] Furthermore, the front sealing assembly includes a second O-ring, a third O-ring and a sealing thread ring, the diameter of the second O-ring is larger than the diameter of the third O-ring, and the second O-ring and the third O-ring are sequentially installed in the conical step groove of the sealing thread ring; the sealing thread ring is threadedly connected to the front end of the flange body and abuts against the third O-ring.

[0014] The beneficial effect of adopting the above further technical solution is to ensure that the front end of the flange body and the pipe are effectively sealed.

[0015] Furthermore, the front sealing assembly also includes a gasket, which is installed between the second O-ring and the gear ring; the sealing thread ring has a first sealing cone groove, and the third O-ring is located between the second O-ring and the first sealing cone groove.

[0016] Furthermore, the rear sealing assembly includes a fourth O-ring, a fifth O-ring and a sealing nut, and a second sealing cone groove is provided between the rear end of the flange body and the tube; the diameter of the fourth O-ring is smaller than the diameter of the fifth O-ring, and the fourth O-ring and the fifth O-ring are sequentially installed in the second sealing cone groove; the sealing nut is threadedly connected to the rear end of the flange body and abuts against the fifth O-ring.

[0017] The beneficial effect of adopting the above further technical solution is to ensure that the rear end of the flange body and the pipe are effectively sealed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0019] Figure 1 The accompanying drawing is an axial longitudinal sectional view of the connection between the flange body and the pipe provided by the present invention;

[0020] Figure 2 The accompanying drawing is a radial view of the connection between the flange body and the pipe provided by the present invention;

[0021] Figure 3 The accompanying drawing is a side view of the gear ring provided by the present invention;

[0022] Figure 4 The accompanying drawing is a cross-sectional view of the gear ring provided by the present invention.

[0023] In the figure: 1-flange body, 2-clamping assembly, 3-front sealing assembly, 4-rear sealing assembly, 5-tube, 6-bolt, 21-toothed ring, 22-clamping screw, 23-sealing screw, 24-first O-type sealing ring, 31-second O-type sealing ring, 32-third O-type sealing ring, 33-sealing thread ring, 34-washer, 41-fourth O-type sealing ring, 42-fifth O-type sealing ring, 43-sealing nut, 211-axial through groove, 212-serrated groove. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] like Figure 1-4 As shown, the embodiment of the present invention discloses a quick-connect flange device for valve installation, which is suitable for valves with a diameter of DN40 or above, including a flange body 1, a clamping assembly 2, a front sealing assembly 3 and a rear sealing assembly 4. The flange body 1 is installed on the pipe 5 through the clamping assembly 2, and the flange body 1 is connected to the flange of the valve (not shown in the figure) through bolts 6; the two ends of the flange body 1 are sealed and connected to the pipe 5 through the front sealing assembly 3 and the rear sealing assembly 4 respectively. The clamping assembly 2 of the present invention enables the flange body 1 to be tightly connected to the pipe 5, and the front sealing assembly 3 and the rear sealing assembly 4 enable the flange body 1 and the pipe 5 to be sealed reliably. At this time, the valve flange can be directly connected to the flange body 1 installed on the pipe 5 through bolts 6. On the one hand, the operation is simple and convenient, and there is no need to connect the power supply. At the same time, it can be operated with water and does not require professional equipment, which is efficient, improves quality, and saves energy and reduces consumption; on the other hand, the required operating space is small and the amount of earthwork is small; finally, it can be applied to non-metallic material pipelines or metal material pipelines, with a wide range of applications and suitable for large-scale promotion.

[0026] Specifically, the clamping assembly 2 includes a gear ring 21 and a clamping screw 22. There is a step groove between the main body of the flange body 1 and the tube 5, and the flange body 1 has a radial threaded hole; the inner wall of the gear ring 21 has a serrated groove 212 along the circumferential direction; the gear ring 21 has an axial through groove 211; the gear ring 21 is installed in the step groove, and the serrated groove 212 is in contact with the tube 5; it is worth mentioning that the gear ring 21 has sufficient elasticity and hardness through heat treatment; the clamping screw 22 is screwed into the radial threaded hole of the flange body 1 and abuts against the outer wall of the gear ring 21. In this embodiment, the number of the clamping screws 22 is two, and accordingly, the flange body 1 has two radial threaded holes, and the two clamping screws 22 are respectively screwed into the two radial threaded holes to clamp the gear ring 21.

[0027] Specifically, the clamping assembly 2 also includes a sealing screw 23 and a first O-ring 24. The clamping screw 22 has an axial through hole. In the present embodiment, only one clamping screw 22 has an axial through hole, which is convenient for water to flow during pressure pressing. The flange body 1 has a sealing hole at the top of the radial threaded hole. The sealing screw 23 is screwed into the radial threaded hole and clamps the clamping screw 22. The first O-ring 24 is installed in the upper outer diameter groove of the sealing screw 23 and is located in the sealing hole. On the one hand, it acts as a back nut to prevent the clamping screw 22 from loosening, so that the gear ring 21 can grip the tube stably and reliably. On the other hand, the thread root of the sealing screw 23 has a sealing ring groove and is equipped with a first O-ring 24, which cooperates with the sealing hole to achieve sealing here.

[0028] The process of testing the sealing effect on site is as follows: after installing the flange device on the pipe 5, replace a sealing screw 23 with a pressure fitting and tighten it, and connect the pressure fitting, and pressurize it at 1.5 times the maximum operating pressure of the pipeline. Keep the pressure for a period of time, and the sealing condition of the flange device can be detected on the installation site. If there is no leakage, the pressure is completed. If there is leakage, adjust the clamping force of the sealing nut and the sealing thread ring until the seal is reliable and the pressure is completed. Finally, remove the pressure fitting and the pressure fitting, reinstall the sealing screw 23 and the first O-ring 24 and tighten them, and the installation is completed. Thus, it is realized that the flange device can be pressure tested on site to see if it leaks without passing water in the pipeline. After the seal is reliable, the next step of the pipeline installation and the water passing of the entire pipeline can be carried out, ensuring that the pipeline is successfully installed and water is passed once, without rework, and avoiding the need to pass water in the entire pipeline to detect the sealing condition of the weld and hot-melt connection, such as welding and hot-melt flanges.

[0029] In order to ensure effective sealing between the front end of the flange body 1 and the pipe 5, the front sealing assembly 3 includes a second O-ring 31, a third O-ring 32 and a sealing thread ring 33. The diameter of the second O-ring 31 is larger than that of the third O-ring 32. The second O-ring 31 and the third O-ring 32 are sequentially installed in the tapered step groove of the sealing thread ring 33; the sealing thread ring 33 is threadedly connected to the front end of the flange body 1 and abuts against the third O-ring 32, that is, tightening the sealing thread ring 33 with a wrench can compress the second O-ring 31 and the third O-ring 32 to make them swell in the tapered step groove, so that the liquid transported in the pipe 5 can be effectively sealed without leakage even at a high pressure; it is worth mentioning that after the sealing thread ring 33 is tightened, it is flush with the waterline sealing end face of the flange body 1 to ensure the sealing of the flange body 1 and the end face of the valve flange.

[0030] Specifically, the front sealing assembly 3 also includes a gasket 34, which is installed between the second O-ring 31 and the gear ring 21; the sealing thread ring 33 has a first sealing cone groove, and the third O-ring 32 is located between the second O-ring 31 and the first sealing cone groove.

[0031] In order to ensure effective sealing between the rear end of the flange body 1 and the tube 5, the rear sealing assembly 4 includes a fourth O-ring 41, a fifth O-ring 42 and a sealing nut 43, and a second sealing cone groove is provided between the rear end of the flange body 1 and the tube 5; the diameter of the fourth O-ring 41 is smaller than the diameter of the fifth O-ring 42, and the fourth O-ring 41 and the fifth O-ring 42 are sequentially installed in the second sealing cone groove; the sealing nut 43 is threadedly connected to the rear end of the flange body 1 and abuts against the fifth O-ring 42, that is, tightening the sealing nut 43 can compress the fourth O-ring 41 and the fifth O-ring 42, so that the pressure bearing capacity of the seal is higher.

[0032] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0033] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A quick-connect flange device for valve installation, It is characterized in that It comprises a flange body, a clamping assembly, a front sealing assembly and a rear sealing assembly, wherein the flange body is installed on the pipe through the clamping assembly, and the flange body is connected to the flange of the valve through bolts; the two ends of the flange body are respectively sealed and connected to the pipe through the front sealing assembly and the rear sealing assembly; The clamping assembly comprises a gear ring and a clamping screw, a step groove is provided between the main body of the flange body and the tube, and the flange body has a radial threaded hole; the inner wall of the gear ring has a sawtooth groove along the circumferential direction, and the gear ring has an axial through groove; the gear ring is installed in the step groove, and the sawtooth groove contacts the tube; the clamping screw is screwed into the radial threaded hole of the flange body and abuts against the outer wall of the gear ring; The clamping assembly further includes a sealing screw and a first O-type sealing ring, wherein the clamping screw has an axial through hole; the flange body is located at the top of the radial threaded hole and has a sealing hole; the sealing screw is screwed into the radial threaded hole and clamps the clamping screw; the first O-type sealing ring is installed in the outer diameter groove on the upper part of the sealing screw and is located in the sealing hole; The front sealing assembly comprises a second O-ring, a third O-ring and a sealing thread ring, the diameter of the second O-ring is larger than the diameter of the third O-ring, the second O-ring and the third O-ring are sequentially installed in the conical step groove of the sealing thread ring; the sealing thread ring is threadedly connected to the front end of the flange body and abuts against the third O-ring; The front sealing assembly also includes a gasket, which is installed between the second O-ring and the gear ring; the sealing thread ring has a first sealing cone groove, and the third O-ring is located between the second O-ring and the first sealing cone groove.

2. A quick-connect flange device for valve installation according to claim 1, It is characterized in that The rear sealing assembly includes a fourth O-ring, a fifth O-ring and a sealing nut, and a second sealing cone groove is provided between the rear end of the flange body and the tube; the diameter of the fourth O-ring is smaller than the diameter of the fifth O-ring, and the fourth O-ring and the fifth O-ring are sequentially installed in the second sealing cone groove; the sealing nut is threadedly connected to the rear end of the flange body and abuts against the fifth O-ring.

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