A heating and plumbing conduit connection device

Abstract

The utility model discloses a kind of heating and ventilation pipeline connecting devices, relate to pipeline connecting technical field. Including two opposite flange's heating and ventilation pipeline, further include: tight sleeve ring, tight sleeve ring is corresponding two groups between two heating and ventilation pipelines and is sleeved on heating and ventilation pipeline;And first push sleeve structure and second push sleeve structure, first push sleeve structure and second push sleeve structure are respectively sleeved on two heating and ventilation pipelines, second push sleeve structure one end can be inserted into first push sleeve structure and carry out screw connection, first push sleeve structure and second push sleeve structure between screw cooperation to simultaneously push two groups of tight sleeve ring and press in the flange of respective corresponding side heating and ventilation pipeline, so that the flange of two heating and ventilation pipelines is butted and is pressed tightly.

Description

Technical Field

[0001] This utility model relates to the field of pipe connection technology, and in particular to a heating, ventilation and air conditioning (HVAC) pipe connection device. Background Technology

[0002] HVAC ducts have a very wide range of applications, including air supply and return ducts for purification systems, ventilation ducts for central air conditioning systems, ventilation ducts for industrial air supply and exhaust systems, air intake and exhaust ducts for environmental protection systems, gas extraction pipes for mines, and plastic-coated ventilation ducts for mines.

[0003] For pipelines with high sealing requirements, flange connections are typically used, with gaskets placed between the flanges to improve the sealing effect. However, this method, where flanges are connected by multiple bolts, can easily lead to excessive local tightening pressure. This uneven pressure on the gaskets can cause localized damage, affecting the sealing performance. Furthermore, bolted flange connections have insufficient radial strength, making them prone to breakage under large radial forces.

[0004] Therefore, based on the above-mentioned technical problems, those skilled in the art urgently need to develop a heating, ventilation, and air conditioning (HVAC) duct connection device. Utility Model Content

[0005] The purpose of this utility model is to provide a heating, ventilation, and air conditioning (HVAC) pipe connection device to solve the above-mentioned problems.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] This utility model discloses a heating, ventilation, and air conditioning (HVAC) pipe connection device, comprising two HVAC pipes with flanges connected opposite each other, and further comprising:

[0008] A tightening collar, wherein the tightening collar consists of two sets corresponding one-to-one with the two HVAC pipes and is fitted onto the HVAC pipes;

[0009] The system includes a first jacking sleeve structure and a second jacking sleeve structure, which are respectively fitted onto the two HVAC pipes. One end of the second jacking sleeve structure can extend into the first jacking sleeve structure and be threadedly connected. The first jacking sleeve structure and the second jacking sleeve structure are threadedly engaged to simultaneously push the two sets of tightening rings onto the flanges of the HVAC pipes on their respective sides, so that the flanges of the two HVAC pipes are connected and tightened.

[0010] Furthermore, one set of the tightening collars has multiple pins on its end face, and each pin corresponds to a multiple mounting hole on the flange of the HVAC pipe. The other set of tightening collars has multiple slots on its end face, and each slot corresponds to a pin. The pins are used to insert into the slots.

[0011] Furthermore, the tightening collar is circular in shape and its outer surface is beveled to form a wedge shape.

[0012] Furthermore, the first jacking sleeve structure includes a first sleeve section and a second sleeve section, which are coaxially arranged and interconnected with each other.

[0013] The first sleeve is used to be fitted onto the HVAC duct and its inner diameter is smaller than the outer diameter of the flange of the HVAC duct.

[0014] The second sleeve is fitted onto the outside of the flange on the HVAC pipe, and the inside of the second sleeve has internal threads.

[0015] Furthermore, the inner wall of the first sleeve has an annular inclined surface corresponding to the wedge shape of the tightening collar, so that the inner wall of the first sleeve and the outer surface of the tightening collar are in surface contact and the tightening collar is pushed by the first sleeve.

[0016] Furthermore, the second push sleeve structure includes a third sleeve section, which is used to be fitted onto the HVAC duct. The inner diameter of the third sleeve section is smaller than the outer diameter of the flange of the HVAC duct, and the outer diameter of the third sleeve section is smaller than the inner diameter of the second sleeve section. The outer surface of the third sleeve section has external threads to enable a threaded connection between the third sleeve section and the second sleeve section.

[0017] Furthermore, the inner wall of the third sleeve has an annular inclined surface corresponding to the wedge shape of the tightening collar, so that the inner wall of the third sleeve and the outer surface of the tightening collar are in surface contact and the tightening collar is pushed by the third sleeve.

[0018] Furthermore, a nut is coaxially provided on the third sleeve, and the inner diameter of the nut is the same as the inner diameter of the third sleeve.

[0019] In the above technical solution, the HVAC duct connection device provided by this utility model has the following features:

[0020] Beneficial effects:

[0021] This device uses a first and a second jacking sleeve structure to push two tightening rings on two pipes respectively to compress the flanges and achieve HVAC duct connection. The face contact and jacking of the tightening rings with the flanges ensures that the compression connection between the flanges is evenly stressed, avoiding excessive local stress on the gasket between the two flanges. Furthermore, the combination of the pin of the tightening ring and the connection between the first and second jacking sleeve structures can improve the radial force resistance of the pipe connection, making the HVAC duct connection more stable. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0023] Figure 1 A schematic diagram of the structure of a heating, ventilation, and air conditioning (HVAC) pipe connection device provided in an embodiment of this utility model;

[0024] Figure 2 A side view of a heating, ventilation, and air conditioning (HVAC) pipe connection device provided in an embodiment of this utility model;

[0025] Figure 3 A schematic diagram of the structure of a tightening collar for a heating, ventilation, and air conditioning (HVAC) pipe connection device provided in this embodiment of the present invention;

[0026] Figure 4 A schematic diagram of the first jacking sleeve structure of a heating, ventilation and air conditioning (HVAC) pipe connection device provided in this embodiment of the present invention;

[0027] Figure 5 This is a schematic diagram of the second jacking sleeve structure of a heating, ventilation and air conditioning (HVAC) pipe connection device provided in an embodiment of the present invention.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. HVAC pipe; 2. Tightening collar; 3. Pin; 4. Slot; 5. First sleeve section; 6. Second sleeve section; 7. Third sleeve section; 8. Nut. Detailed Implementation

[0030] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0031] Please see Figure 1-5A heating, ventilation, and air conditioning (HVAC) pipe connection device includes two HVAC pipes 1 connected to each other with flanges. Similar to conventional pipe connections, the two HVAC pipes 1 are connected by butt joint at the flanges. The device also includes:

[0032] Tightening collar 2, which consists of two sets corresponding one-to-one with the two heating and ventilation pipes 1 and are fitted onto the heating and ventilation pipes 1;

[0033] The system includes a first jacking sleeve structure and a second jacking sleeve structure, which are respectively fitted onto two HVAC pipes 1. One end of the second jacking sleeve structure can extend into the first jacking sleeve structure and be threaded. The threaded engagement between the first and second jacking sleeve structures simultaneously pushes two sets of tightening rings 2 onto the flanges of their respective HVAC pipes 1, thereby aligning and tightening the flanges of the two HVAC pipes 1. The tightening rings 2 and the flanges of the HVAC pipes 1 are in surface contact, ensuring uniform force application to the flanges and preventing excessive localized stress that can occur with bolt tightening alone. This avoids excessive localized pressure on the gaskets, which could damage them and affect the sealing effect. Simultaneously, the connection between the first and second jacking sleeve structures, while tightening the flanges, also enhances the radial positional stability between the flanges, improves the ability to withstand radial forces, and enhances the stability of the HVAC pipe connection.

[0034] Furthermore, one of the two sets of tightening collars 2 has multiple pins 3 on its end face, and the multiple pins 3 correspond one-to-one with the multiple mounting holes on the flange of the HVAC pipe 1. The other set of tightening collars 2 has multiple slots 4 on its end face, and the multiple slots 4 correspond one-to-one with the multiple pins 3. The pins 3 are used to insert into the slots 4.

[0035] Specifically, while the two sets of tightening collars 2 are connected by inserting pins 3 into slots 4, the pins 3 also pass through the assembly holes on the flange of the HVAC pipe 1 to ensure the radial limit and force bearing capacity of the flange connection. Combined with the connection between the first push sleeve structure and the second push sleeve structure, the ability to withstand radial forces is further improved, and the stability of the HVAC pipe connection is enhanced.

[0036] Furthermore, the tightening collar 2 is circular in shape and its outer surface is beveled to form a wedge shape. This allows the first and second jacking sleeve structures to apply axial jacking force to the beveled surface of the tightening collar 2 while also restricting the radial position of the tightening collar 2, thus ensuring the axial and radial connection strength of the pipe flange connection.

[0037] Furthermore, the first jacking sleeve structure includes a first sleeve 5 and a second sleeve 6, which are coaxially arranged and interconnected.

[0038] The first sleeve 5 is used to be fitted onto the HVAC pipe 1 and its inner diameter is smaller than the outer diameter of the flange of the HVAC pipe 1, so that the first push sleeve structure is stably fitted onto the HVAC pipe 1 through the first sleeve 5.

[0039] The second sleeve 6 is fitted onto the outside of the flange on the HVAC pipe 1 so as to connect with the second push sleeve structure. The inner side of the second sleeve 6 has internal threads.

[0040] Furthermore, the inner wall of the first sleeve 5 has an annular inclined surface corresponding to the wedge shape of the tightening ring 2, so that the inner wall of the first sleeve 5 and the outer surface of the tightening ring 2 are in surface contact and the tightening ring 2 is pushed by the first sleeve 5. That is, between the two inclined surfaces, an axial pushing force is applied while a radial position is restricted, so as to ensure the axial connection strength and radial connection strength of the pipe flange connection.

[0041] Furthermore, the second jacking sleeve structure includes a third sleeve 7, which is used to fit onto the HVAC duct 1. The inner diameter of the third sleeve 7 is smaller than the outer diameter of the flange of the HVAC duct 1, so that the second jacking sleeve structure is stably fitted onto the HVAC duct 1 through the third sleeve 7. The outer diameter of the third sleeve 7 is smaller than the inner diameter of the second sleeve 6. The outer surface of the third sleeve 7 has external threads, so that the third sleeve 7 and the second sleeve 6 are threaded together, thereby realizing the connection between the first jacking sleeve structure and the second jacking sleeve structure. In addition, during the threaded engagement between the third sleeve 7 and the second sleeve 6, axial position adjustment can be performed to realize the jacking of the two tightening rings 2 by the second sleeve 6 and the third sleeve 7 respectively.

[0042] Furthermore, the inner wall of the third sleeve 7 has an annular inclined surface corresponding to the wedge shape of the tightening collar 2, so that the inner wall of the third sleeve 7 and the outer surface of the tightening collar 2 are in surface contact and the tightening collar 2 is pushed by the third sleeve 7. That is, between the two inclined surfaces, an axial pushing force is applied while a radial position is restricted, ensuring the axial connection strength and radial connection strength of the pipe flange connection.

[0043] Furthermore, a nut 8 is coaxially mounted on the third sleeve 7. The inner diameter of the nut 8 is the same as that of the third sleeve 7, allowing the threaded connection between the third sleeve 7 and the second sleeve 6 to be tightened using a wrench or similar tool. It should be noted that because the structure formed by the first sleeve 5 and the second sleeve 6 is relatively easy to operate manually, the nut 8 can be tightened manually using a tool. However, in situations requiring greater force, a nut structure similar to the nut 8 can also be installed at the position of the first sleeve 5 to facilitate the tightening of the threaded connection between the third sleeve 7 and the second sleeve 6.

[0044] In summary, this device achieves HVAC duct connection by using the first and second jacking sleeve structures to push two tightening rings on the two pipes respectively to compress the flanges. The face contact and jacking of the tightening rings with the flanges ensures uniform force distribution between the flanges, avoiding excessive local stress on the gasket between the two flanges. Furthermore, the combination of the pin of the tightening ring and the connection between the first and second jacking sleeve structures improves the radial force resistance of the duct connection, making the HVAC duct connection more stable.

[0045] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A heating, ventilation, and air conditioning (HVAC) pipe connection device, comprising two opposing HVAC pipes (1) with flanges, characterized in that, Also includes: Tightening collar (2), the tightening collar (2) is two sets that correspond one-to-one with the two heating and ventilation pipes (1) and are sleeved on the heating and ventilation pipes (1); The first and second push sleeve structures are respectively fitted onto the two HVAC pipes (1). One end of the second push sleeve structure can be inserted into the first push sleeve structure and threadedly connected. The first and second push sleeve structures are threadedly engaged to simultaneously push the two sets of tightening rings (2) onto the flanges of the HVAC pipes (1) on their respective sides, so that the flanges of the two HVAC pipes (1) are connected and tightened.

2. The HVAC duct connection device according to claim 1, characterized in that, One of the two sets of tightening collars (2) has multiple pins (3) on its end face, and the multiple pins (3) correspond one-to-one with the multiple mounting holes on the flange of the HVAC pipe (1). The other set of tightening collars (2) has multiple slots (4) on its end face, and the multiple slots (4) correspond one-to-one with the multiple pins (3). The pins (3) are used to insert into the slots (4).

3. The HVAC duct connection device according to claim 1, characterized in that, The tightening collar (2) is circular in shape and its outer surface is beveled to form a wedge shape.

4. A heating, ventilation, and air conditioning (HVAC) pipe connection device according to claim 3, characterized in that, The first jacking sleeve structure includes a first sleeve (5) and a second sleeve (6), the first sleeve (5) and the second sleeve (6) are coaxially arranged and interconnected; The first sleeve (5) is used to be fitted onto the HVAC pipe (1) and its inner diameter is smaller than the outer diameter of the flange of the HVAC pipe (1); The second sleeve (6) is fitted onto the outside of the flange on the HVAC pipe (1), and the inside of the second sleeve (6) has internal threads.

5. A heating, ventilation, and air conditioning (HVAC) pipe connection device according to claim 4, characterized in that, The inner wall of the first sleeve (5) has an annular inclined surface corresponding to the wedge shape of the tightening collar (2), so that the inner wall of the first sleeve (5) and the outer side of the tightening collar (2) are in surface contact and the tightening collar (2) is pushed by the first sleeve (5).

6. A heating, ventilation, and air conditioning (HVAC) pipe connection device according to claim 4, characterized in that, The second push sleeve structure includes a third sleeve (7), which is used to be sleeved on the HVAC pipe (1). The inner diameter of the third sleeve (7) is smaller than the outer diameter of the flange of the HVAC pipe (1), and the outer diameter of the third sleeve (7) is smaller than the inner diameter of the second sleeve (6). The outer surface of the third sleeve (7) has external threads so that the third sleeve (7) and the second sleeve (6) are threaded together.

7. A heating, ventilation, and air conditioning (HVAC) pipe connection device according to claim 6, characterized in that, The inner wall of the third sleeve (7) has an annular inclined surface corresponding to the wedge shape of the tightening collar (2), so that the inner wall of the third sleeve (7) and the outer side of the tightening collar (2) are in surface contact and the tightening collar (2) is pushed by the third sleeve (7).

8. A heating, ventilation, and air conditioning (HVAC) pipe connection device according to claim 6, characterized in that, A nut (8) is coaxially provided on the third sleeve (7), and the inner diameter of the nut (8) is the same as the inner diameter of the third sleeve (7).

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