Novel pressure test tool suitable for electric heating rod

Abstract

The utility model discloses a novel pressure test tool suitable for an electric heating rod, comprising a pressure test cylinder, one side of the pressure test cylinder is fixedly connected with a screwed joint, one end of the screwed joint is provided with a first sealing groove, the outer side of the first sealing groove is provided with a conversion joint, and a metal flat gasket is arranged between the screwed joint and the conversion joint. A second sealing groove is formed in one end of the conversion connector, an O-shaped sealing ring is installed in the second sealing groove, a compression nut is arranged at one end of the conversion connector, and a sealing ring is fixedly connected into the compression nut. The electric heating rod pressure test tool has the following effects: by adopting the self-sealing performance of the O-shaped sealing ring, the compatibility problem of the electric heating rod pressure test tool under different pressure test pressures is successfully solved; the capability of carrying out withstand voltage tests on various electric heating rods with different specifications by using the same set of pressure test tool is realized. In this way, the types of pressure test tools are greatly reduced, and the universality and flexibility of the tools are improved.

Description

Technical Field

[0001] This utility model relates to the technical field of electric heating rod testing equipment, and more specifically, to a novel pressure testing fixture suitable for electric heating rods. Background Technology

[0002] Electric heating rods are widely used in chemical equipment, typically serving as heating elements to provide heat to the media within pressure vessels. These devices often operate under harsh conditions, requiring electric heating rods to withstand extreme heat. This demanding environment places high demands on the performance of these heating elements.

[0003] Before electric heating rods are put into use, they must undergo a pressure test to ensure they do not deform or break under high pressure. This test is crucial for ensuring the quality and safety of the electric heating rods. The pressure test pressure of the electric heating rod is usually consistent with the pressure test pressure of the pressure vessel equipment it is used in. However, when the pressure test pressure is high, achieving an effective seal between the test fixture and the electric heating rod becomes a critical issue. If the seal is poor, the expected pressure test pressure cannot be reached, thus preventing the completion of the inspection work.

[0004] Currently, existing pressure testing fixtures for electric heating rods have several shortcomings. First, they often require individual design for different specifications of electric heating rods, leading to a wide variety of fixture types and increased manufacturing costs. Second, because the pressure test pressure of the electric heating rod is closely related to the pressure test pressure of the pressure vessel equipment it is applied to, excessively high test pressures may prevent certain specifications of pressure testing fixtures from achieving an effective seal. In such cases, a redesign is necessary, which is not only time-consuming and labor-intensive but also incurs additional costs.

[0005] No effective solutions have yet been proposed to address the problems in the relevant technologies. Utility Model Content

[0006] In view of the problems in the related technologies, this utility model proposes a new pressure testing fixture suitable for electric heating rods to overcome the above-mentioned technical problems existing in the existing related technologies.

[0007] Therefore, the specific technical solution adopted by this utility model is as follows:

[0008] A novel pressure testing fixture for electric heating rods includes a pressure testing cylinder. A threaded joint is fixedly connected to one side of the pressure testing cylinder. One end of the threaded joint has a sealing groove 1. An adapter is provided on the outside of the sealing groove 1. A metal flat gasket is provided between the threaded joint and the adapter. One end of the adapter has a sealing groove 2. An O-ring is installed inside the sealing groove 2. One end of the adapter has a clamping nut. A sealing ring is fixedly connected inside the clamping nut. The sealing ring mates with the sealing groove 1 and the sealing groove 2 respectively.

[0009] Furthermore, in order to achieve the mutual connection between the clamping nut and the adapter and the threaded connector, a positioning thread is provided on one side of the outer surface of the threaded connector and the adapter, and the internal thread on one side of the adapter and the clamping nut is engaged with the positioning thread.

[0010] Furthermore, in order to limit the electric heating rod in the horizontal direction during the pressure test and prevent the electric heating rod from sliding out of the pressure test cylinder, a support plate is fixedly connected to the upper and lower sides of one end of the clamping nut. A clamping bolt is threaded onto the support plate, and a clamping plate is fixedly connected to the end of the clamping bolt.

[0011] Furthermore, to facilitate the connection between the pressure testing cylinder and the pressure testing pump, a pressure testing pump connector is fixedly connected to one end of the pressure testing cylinder.

[0012] Furthermore, to increase the friction when the clamping plate contacts the electric heating rod, one side surface of the clamping plate is provided with anti-slip texture.

[0013] Furthermore, in order to achieve the self-sealing properties and strong pressure resistance of the O-ring, the O-ring is made of rubber.

[0014] Furthermore, to facilitate the tightening of the clamping bolt and the tightening nut, a tightening block is fixedly connected to one end of the clamping bolt.

[0015] The beneficial effects of this utility model are as follows:

[0016] 1. By employing the simple and reliable O-ring seal structure, the compatibility issue of the electric heating rod pressure testing fixture under different pressure test conditions is effectively solved. During pressure testing, the O-ring is fitted onto one side of the outer surface of the electric heating rod and pressed into the sealing groove. Due to the self-sealing property of the O-ring, the pressure resistance can reach up to 100 MPa, with a wide applicable sealing pressure range and zero leakage, effectively sealing in both high-pressure and low-pressure environments. This characteristic not only improves the sealing performance of the pressure testing fixture but also makes the pressure testing process safer and more reliable.

[0017] 2. By using metal flat gaskets and adapters in conjunction, during pressure testing, the matching metal flat gaskets and adapters can be replaced according to different specifications of electric heating rods. This eliminates the need to replace or redesign the entire pressure testing fixture, enabling a single pressure testing fixture to perform pressure tests on various specifications of electric heating rods. This significantly reduces the types and number of pressure testing fixtures, thereby lowering manufacturing and usage costs. Simultaneously, the metal flat gaskets offer excellent sealing performance, with a pressure resistance of up to 35MPa, essentially covering the upper limit of the design pressure of conventional pressure vessel products, further ensuring the safety and reliability of the pressure test. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the installation structure of an electric heating rod and the inner diameter of a threaded joint in a novel pressure testing fixture applicable to an electric heating rod according to an embodiment of the present utility model.

[0020] Figure 2 This is an internal cross-sectional view of an electric heating rod in a novel pressure testing fixture for electric heating rods, according to an embodiment of the present invention, when the electric heating rod is fitted with the inner diameter of the threaded joint.

[0021] Figure 3 This is a schematic diagram of the installation structure of an electric heating rod and a conversion connector in a novel pressure testing fixture for electric heating rods according to an embodiment of the present utility model;

[0022] Figure 4 This is an internal cross-sectional view of an electric heating rod and conversion connector installed in a novel pressure testing fixture for electric heating rods according to an embodiment of the present invention.

[0023] In the picture:

[0024] 1. Test cylinder; 2. Threaded connector; 3. Sealing groove one; 4. Adaptor connector; 5. Metal flat gasket; 6. Sealing groove two; 7. O-ring seal; 8. Compression nut; 9. Sealing ring; 10. Positioning thread; 11. Support plate; 12. Clamping bolt; 13. Clamping plate; 14. Test pump connector; 15. Anti-slip texture; 16. Tightening block. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] According to an embodiment of the present invention, a novel pressure testing fixture suitable for electric heating rods is provided.

[0027] Example 1:

[0028] like Figures 1-4 As shown, a novel pressure testing fixture for electric heating rods according to an embodiment of this utility model includes a cylindrical pressure testing cylinder 1 made of hard alloy material. A threaded connector 2 is fixedly connected to one side of the pressure testing cylinder 1. One end of the threaded connector 2 has a sealing groove 3. A conversion connector 4 is provided outside the sealing groove 3. A metal flat gasket 5 is provided between the threaded connector 2 and the conversion connector 4. One end of the conversion connector 4 has a second sealing groove 6. An O-ring 7 is installed inside the second sealing groove 6. The O-ring 7 is made of rubber, has self-sealing properties, and can withstand pressure up to 100MPa. One end of the conversion connector 4 is provided with a clamping nut 8. The clamping nut 8 has a... A sealing ring 9 is fixedly connected, and the sealing ring 9 mates with the sealing groove 1 3 and the sealing groove 2 6 respectively. The outer surface of the threaded connector 2 and the conversion connector 4 are provided with a positioning thread 10 on one side. The internal threads on one side of the conversion connector 4 and the clamping nut 8 mate with the positioning thread 10. When the electric heating rod that needs to be pressure tested is sealed with the inner diameter of the threaded connector 2, the O-ring 7 can be placed in the sealing groove 1 3, and then the clamping nut 8 can be tightened and installed on one side of the threaded connector 2, so that the sealing ring 9 squeezes the O-ring 7 in the sealing groove 1 3, thereby achieving effective sealing of the electric heating rod. It is not necessary to use the conversion connector 4 and the metal flat gasket 5 to seal the electric heating rod.

[0029] like Figures 1-4As shown, a support plate 11 is fixedly connected to the upper and lower sides of one end of the clamping nut 8. A clamping bolt 12 is threaded onto the support plate 11. A clamping plate 13 is fixedly connected to the end of the clamping bolt 12. After the electric heating rod is sealed and installed in the test cylinder 1 on one side, the clamping plates 13 at the ends of the two clamping bolts 12 are tightened to bring them closer together and press against the surface of the electric heating rod, thereby clamping and limiting the electric heating rod for pressure testing and preventing it from sliding out of the test cylinder 1. A test pump connector 14 is fixedly connected to one end of the test cylinder 1 to facilitate the connection between the test cylinder 1 and the test pump. An anti-slip texture 15 is provided on one side of the clamping plate 13 to increase the friction when the clamping plate 13 contacts the surface of the electric heating rod. A tightening block 16 is fixedly connected to one end of the clamping bolt 12 to facilitate the tightening of the clamping bolt 12 and the adapter 4.

[0030] To facilitate understanding of the above-mentioned technical solutions of this utility model, the working principle or operation method of this utility model in actual process will be described in detail below.

[0031] In summary, with the help of the above-mentioned technical solution of this utility model, in actual use, when facing an electric heating rod whose size and specifications match the inner diameter of the threaded connector 2, one side of the electric heating rod is passed through the threaded connector 2 and installed inside the pressure testing cylinder 1. An O-ring 7 is then fitted onto the outer surface of the electric heating rod, allowing it to fit into the sealing groove 3. After the pressure nut 8 is fitted onto the outside of the electric heating rod, one end of the threaded connector 2 is tightened, causing the sealing ring 9 to press against the O-ring 7 in the sealing groove 3, thus achieving effective sealing of the electric heating rod. After the electric heating rod is sealed and installed, the two clamping bolts 12 at one end of the pressure nut 8 are tightened, causing the clamping plates 13 at their ends to come closer together and press against the surface of the electric heating rod, achieving pressure... The electric heating rod for force testing is clamped and limited. When facing an electric heating pump with a size smaller than the inner diameter of the threaded connector 2, one side of the electric heating rod is passed through the threaded connector 2 and installed inside the pressure test cylinder 1. The metal flat gasket 5 that mates with the electric heating rod is installed at one end of the threaded connector 2. Then, the adapter 4 is fixedly installed on one side of the threaded connector 2 through a threaded connection, so that the adapter 4 and the threaded connector 2 press the metal flat gasket 5 towards the seal. At this time, the O-ring 7 is fitted and installed in the sealing groove 2 6 at one end of the adapter 4. Then, the clamping nut 8 is tightened and installed at one end of the threaded connector 2, so that the sealing ring 9 presses the O-ring 7 in the sealing groove 2 6, thereby achieving the sealed installation when testing electric heating rods of different specifications.

[0032] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A novel pressure testing fixture suitable for electric heating rods, characterized in that, The test cylinder (1) is fixedly connected to one side of the test cylinder (1). One end of the threaded joint (2) has a sealing groove (3). A conversion joint (4) is provided on the outside of the sealing groove (3). A metal flat gasket (5) is provided between the threaded joint (2) and the conversion joint (4). One end of the conversion joint (4) has a sealing groove (6). An O-ring (7) is installed inside the sealing groove (6). One end of the conversion joint (4) is provided with a clamping nut (8). A sealing ring (9) is fixedly connected inside the clamping nut (8). The sealing ring (9) cooperates with the sealing groove (3) and the sealing groove (6) respectively.

2. The novel pressure testing fixture for electric heating rods according to claim 1, characterized in that, The outer surface of both the threaded joint (2) and the adapter (4) is provided with a positioning thread (10), and the internal threads on one side of both the adapter (4) and the clamping nut (8) are engaged with the positioning thread (10).

3. A novel pressure testing fixture for electric heating rods according to claim 1, characterized in that, The clamping nut (8) has a support plate (11) fixedly connected to the upper and lower sides of one end. The support plate (11) is threaded with a clamping bolt (12), and the end of the clamping bolt (12) is fixedly connected with a clamping plate (13).

4. A novel pressure testing fixture for electric heating rods according to claim 1, characterized in that, One end of the test cylinder (1) is fixedly connected to a test pump connector (14).

5. A novel pressure testing fixture for electric heating rods according to claim 3, characterized in that, The clamping plate (13) has anti-slip texture (15) on one side surface.

6. A novel pressure testing fixture for electric heating rods according to claim 1, characterized in that, The O-ring (7) is made of rubber.

7. A novel pressure testing fixture for electric heating rods according to claim 3, characterized in that, One end of the clamping bolt (12) is fixedly connected to a screwing block (16).

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