Armored heater for low-temperature pump

Abstract

The utility model provides an armored heater for a low-temperature pump, which comprises a heating element and a cable, the heating element is connected with the cable, a reducing sleeve is arranged at the joint of the heating element and the cable, the cable is connected with a sealing seat, and the sealing seat is used for being installed on the low-temperature pump. And the cable section between the reducing sleeve and the sealing seat is wrapped with a soft tube. The connection stability of the heating element and the cable is enhanced through the design of the reducing sleeve in the heater, tight installation of the heating element and the low-temperature pump is ensured through the sealing seat, and the mechanical strength and the corrosion resistance are improved through the soft-state pipe wrapping design of the cable section, and the flexibility and the reliability in the extremely low-temperature environment are ensured. According to the utility model, through a series of innovative designs, the overall performance of the heater is improved, and the reliability and durability of the heater in an extremely low temperature environment are also enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of electric heaters, in particular to an armored heater for a cryogenic pump. Background Art

[0002] In the field of cryopump heater design, corrosion resistance, electrical safety and adaptability are three core technical challenges. Although existing armored heaters provide a certain degree of protection in terms of corrosion resistance, they still have shortcomings in practical applications. Some heaters use magnesium oxide as an insulating material and adopt a rigid tube structure. This design is incapable of adapting to complex installation environments when bending is required. The rigid tube structure not only limits the possibility of bending, but also may damage the internal insulation layer after multiple bending, increasing the risk of short circuits.

[0003] On the other hand, armored heaters using large diameter tubes or corrugated tubes provide flexibility to a certain extent, but their bulky appearance and non-compact structure make them difficult to adapt to installation environments with limited space. In addition, existing heaters generally lack effective sealing mechanisms and are usually fixed only by glue, which not only limits the convenience of installation and disassembly, but also fails to provide the necessary sealing performance, making the equipment vulnerable to erosion by corrosive gases and accumulated liquids. Utility Model Content

[0004] In order to solve all or part of the problems of the above-mentioned prior art, the utility model provides an armored heater for a cryogenic pump, which has multi-angle bending flexibility and excellent sealing performance, and effectively prevents erosion by corrosive gases and accumulated liquid.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] An armored heater for a cryopump includes a heating element and a cable. The heating element and the cable are connected, and a transfer sleeve is provided at the connection. A sealing seat is connected to the cable, and the sealing seat is used to be installed on the cryopump. A soft tube is wrapped on the cable segment between the transfer sleeve and the sealing seat. The design of the transfer sleeve in the heater enhances the connection stability between the heating element and the cable, the sealing seat ensures a tight installation with the cryopump, and the soft tube wrapping design of the cable segment not only provides mechanical strength and corrosion resistance, but also ensures flexibility and reliability in extreme low temperature environments.

[0007] The heating element is detachably mounted on the cooling portion of the cryopump cavity, and the sealing seat is detachably mounted on the mounting seat of the cryopump cavity. Since both the heating element and the sealing seat of the heater are detachable, when the heater needs to be replaced or repaired, the user does not need to replace the entire pump body or heating system, but only needs to remove and replace the heater itself, which greatly reduces the cost of maintenance and replacement.

[0008] One end of the adapter sleeve is sleeved and welded to one end of the heating element, and the other end is sleeved and welded to the soft tube; the other end of the soft tube is extended into the sealing seat and welded at the connection. The welding connection of the adapter sleeve ensures the electrical and mechanical stability between the heating element and the cable, while the wrapping and welding of the soft tube provide additional protection to prevent damage in low temperature environments.

[0009] The two pins on the heating element are crimped and connected to the cable through a crimping terminal, and an insulating sleeve is provided at the crimping point. The use of the insulating sleeve effectively prevents electrical short circuits and leakage, and improves the safety of the overall heater. In addition, the insulating sleeve also provides additional mechanical protection for the connection point, enhancing its durability in harsh environments.

[0010] The sealing seat is provided with one or more cable through holes, the size and shape of which match the cable. This design allows multiple heaters to be installed on the same sealing seat, greatly improving the flexibility and expansibility of installation. Users can flexibly increase or decrease the number of heaters as needed without changing the structure of the sealing seat.

[0011] The sealing seat is a sealing flange, the connection end of which matches the interface of the cryopump and is sealed and connected to the cryopump through threaded connection or flange docking. When maintenance or replacement is required, the design of the sealing flange makes it easier to disassemble and reinstall, reducing maintenance costs and time.

[0012] The sealing flange is one of a KF flange and a CF flange. The standardized flange design allows the heater to be easily integrated with various cryopump systems.

[0013] The outer layer of the cable is wrapped with an insulating layer, which protects the cable from physical damage and environmental corrosion, thereby extending the service life of the cable.

[0014] The soft pipe is a stainless steel soft pipe. The stainless steel soft pipe has excellent corrosion resistance, can resist the erosion of various chemicals and environmental factors, and is suitable for use in harsh industrial environments.

[0015] The cable and the flexible tube have a withstand voltage resistance value of at least 200 megohms. The high withstand voltage resistance value means that the cable and the flexible tube can remain safe even in a high voltage environment, reducing the risk of electrical failure and fire.

[0016] The utility model has at least the following beneficial effects:

[0017] 1) The heater of the utility model adopts a stainless steel soft tube to wrap the cable segment, which provides excellent mechanical strength and corrosion resistance. This design not only protects the internal cable from physical damage and environmental erosion, but also ensures flexibility and reliability in extreme low temperature environments. The flexible design of the soft tube makes the cable more flexible during installation and use, which is convenient for wiring and adapting to installation spaces of different shapes. The detachable design of the heating element and the sealing seat means that when replacement or maintenance is required, the user does not need to replace the entire pump body or heating system, but only needs to replace the heater itself, thereby reducing the cost of maintenance and replacement.

[0018] 2) The design of the sealing seat ensures tight installation with the cryogenic pump, effectively prevents erosion by corrosive gases and effluent, and improves the sealing and reliability of the system. By setting multiple cable through holes on the sealing seat, multiple heaters can be installed on the same sealing seat, greatly improving the flexibility and scalability of installation. Users can flexibly increase or decrease the number of heaters according to specific needs without changing the structure of the sealing seat. In addition, the use of sealing flanges simplifies the process of disassembly and reinstallation, reducing maintenance costs and time.

[0019] 3) The design of the adapter sleeve enhances the connection stability between the heating element and the cable, and is connected to the heating element and the flexible tube by welding to form a solid electrical and mechanical connection. This ensures that the connection between the heating element and the cable remains stable in various working environments, especially in harsh conditions with large vibrations or temperature changes, thereby improving the durability and long-term stability of the overall heater. Both the cable and the flexible tube are made of high-standard insulation materials with a withstand voltage resistance value of at least 200 megohms, ensuring safety even in high-voltage environments, effectively preventing electrical failures and potential fire risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the specific embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 It is a schematic structural diagram of an embodiment of an armored heater for a cryogenic pump according to the utility model.

[0022] Figure numerals: 1-heating element; 2-cable; 3-crimping terminal; 4-adapter sleeve; 5-sealing seat; 6-soft tube. DETAILED DESCRIPTION

[0023] The technical solutions in the specific embodiments of the utility model are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Combined with reference Figure 1 As shown, the utility model discloses an armored heater specially designed for a cryogenic pump, which is composed of a heating element 1 and a cable 2 connected to each other. A transfer sleeve 4 is specially designed at the connection between the heating element 1 and the cable 2 to enhance the stability and sealing of the connection and ensure the long-term reliability of the connection. In order to further improve the installation convenience and sealing performance of the heater, a sealing seat 5 is installed at the end of the cable 2. The sealing seat 5 is designed as a sealing flange, which can be sealed with the cryogenic pump through threaded connection or flange docking. This design allows the use of KF flanges, CF flanges or other types of flanges to adapt to different cryogenic pump interfaces. The heater adopts the design of the transfer sleeve 4 and the sealing seat 5, which effectively enhances the connection stability of the heating element 1 and the cable 2 and ensures tight installation with the cryogenic pump. The combined design of the transfer sleeve 4 and the soft tube 6 not only provides excellent mechanical strength and corrosion resistance, but also maintains flexibility and reliability in extreme low temperature environments, avoiding the erosion of the system by corrosive gases and effluent.

[0025] The connection design of the heating element 1 fully considers safety and durability. In the present embodiment, the heating element 1 is specifically in the form of an electric heating rod, which can realize rapid and uniform heating of the cryopump. The two pins at the connection end of the electric heating rod are crimped and connected to the cable 2 through the crimping terminal 3, and are covered with an insulating sleeve to ensure the safety and reliability of the electrical connection. An insulating sleeve is provided at the connection of the crimping terminal 3 between the heating element 1 and the cable 2, which effectively prevents electrical short circuits and leakage, and improves the safety of the overall heater. In addition, the insulating sleeve provides additional mechanical protection for the connection point, enhances durability in harsh environments, and extends the service life of the equipment.

[0026] The cable section between the adapter sleeve 4 and the sealing seat 5 is wrapped with a flexible stainless steel hose. This design not only provides the necessary mechanical strength and corrosion resistance, but also ensures the flexibility of the heater during installation and use through its flexible characteristics. The wrapping design of the flexible stainless steel hose effectively isolates the adverse effects of the low temperature environment on the cable 2, and at the same time, protects the heating element 1 from damage by external factors. The characteristics of the flexible stainless steel hose allow the cable 2 to remain flexible during installation and use. This is particularly important for installing heaters in confined spaces such as cryogenic pumps, because it ensures that system components can move freely without being restricted by hard connections. One end of the adapter sleeve 4 is sleeved and welded with one end of the heating element 1, and the other end is sleeved and welded with the soft tube 6; the other end of the soft tube 6 is extended into the sealing seat 5 and welded at the connection. The welded connection of the adapter sleeve 4 ensures the electrical and mechanical stability between the heating element 1 and the cable 2, while the wrapping and welding of the soft tube 6 provide additional protection against damage in harsh environments.

[0027] The sealing seat 5 is provided with one or more cable 2 through holes, the size and shape of which are precisely matched with the cable 2, and are equipped with sealing elements such as sealing rings or sealing pads to ensure good sealing performance. The outer layer of the cable 2 is covered with an insulating layer to ensure safe operation and electrical performance. The cable 2 and the stainless steel soft tube 6 both have a withstand voltage resistance value of at least 200 megohms, ensuring that the heater can remain safe even in a high voltage environment, reducing the risk of electrical failure and fire. The design of the sealing seat 5 allows multiple heaters to be installed in the same position, and the sealing elements equipped with the cable 2 through holes effectively prevent the external environment from interfering with the system, thereby improving the overall stability and reliability of the equipment. The cryopump is connected with a standardized KF or CF flange, making installation, disassembly and maintenance easier, reducing maintenance costs and time investment. The heating element 1 is detachably mounted on the cooling part of the cryopump cavity, and the sealing seat 5 is detachably mounted on the mounting seat of the cryopump cavity, so that the user can quickly and conveniently disassemble and reinstall these components without having to replace the entire pump body or heating system. Preferably, the heating element 1 is designed to be pluggable or easy to install, so that the work can be completed more quickly and efficiently during the installation process.

[0028] The heater design of the utility model takes into account the various needs of cryopumps in industrial applications. Through the optimization of the above structure, not only the reliability and stability of the heater are improved, but also the adaptability and durability of the heater under extreme working conditions are enhanced through its innovative structural design. This design is suitable for a variety of cryopump systems, including but not limited to the chemical, petroleum, natural gas and pharmaceutical industries, providing these industries with an efficient and reliable heating solution.

[0029] It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made to the utility model without departing from the principle of the utility model, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. An armored heater for a cryopump, characterized in that: The invention comprises a heating element (1) and a cable (2), wherein the heating element (1) and the cable (2) are connected, and an adapter sleeve (4) is provided at the connection point; a sealing seat (5) is connected to the cable (2), and the sealing seat (5) is used for being installed on a cryogenic pump; and a soft tube (6) is wrapped on the cable section between the adapter sleeve (4) and the sealing seat (5).

2. The heater according to claim 1, characterized in that The heating element (1) is detachably mounted on a cooling portion of a cryopump cavity, and the sealing seat (5) is detachably mounted on a mounting seat of the cryopump cavity.

3. The heater according to claim 1, characterized in that One end of the adapter sleeve (4) is welded to one end of the heating element (1), and the other end is welded to the soft tube (6); the other end of the soft tube (6) extends into the sealing seat (5) and is welded at the connection.

4. The heater according to claim 1, characterized in that The two pins on the heating element (1) are crimped and connected to the cable (2) via a crimping terminal (3), and an insulating sleeve is provided at the crimping point.

5. The heater according to claim 1, characterized in that The sealing seat (5) is provided with one or more cable (2) passing holes, and the size and shape of the cable (2) passing holes match those of the cable (2).

6. The heater according to claim 1, characterized in that The sealing seat (5) is a sealing flange, the connection end of which matches the interface of the cryogenic pump and is sealed and connected to the cryogenic pump through threaded connection or flange docking.

7. The heater according to claim 6, characterized in that The sealing flange is a KF flange or a CF flange.

8. The heater according to claim 1, characterized in that The outer layer of the cable (2) is wrapped with an insulating layer.

9. The heater according to claim 1, characterized in that The soft pipe (6) is a stainless steel soft pipe.

10. The heater according to claim 1, characterized in that The cable (2) and the flexible tube (6) have a withstand voltage resistance value of at least 200 megohms.

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