Electric heating device for valve

Abstract

The utility model discloses a valve electric heating device which comprises a shell and a heating device, the top end and two opposite side faces of the shell respectively penetrate through the wall face of the shell and are provided with through holes corresponding to a valve structure, the shell comprises a first shell body and a second shell body, and the first shell body and the second shell body evenly divide the first shell body and the second shell body along the axes of the through holes. The lower ends of the first shell and the second shell are hinged; extending parts are arranged on the two sides of a splicing seam of the first shell and the second shell respectively, and the extending parts correspond to the through holes in the two opposite side faces respectively; at least two sets of locking devices are arranged at the upper end of the shell, each locking device comprises an inserting part and a locking part, and the inserting parts and the locking parts are correspondingly installed on the first shell and the second shell respectively and used for rapidly disassembling and assembling the shells.

Description

Technical Field

[0001] The utility model relates to the technical field of electric heating devices, and particularly relates to an electric heating device for a valve. Background Art

[0002] In the industrial production process, valves, as important components for controlling fluid flow, are widely used in fields such as petroleum, chemical industry, metallurgy, and electric power. However, in cold environments, the fluid or medium inside the valve may freeze or solidify, resulting in the valve being unable to be opened or closed normally. When installing existing valve heating devices, the cooperation of multiple people is required, which takes a long time.

[0003] For example, the Chinese patent with the publication number CN110715110A discloses an electric heating device for a liquid metal valve. During installation, one person needs to align and splice two groups of shells, and then another person uses screws for fixation. The disassembly and installation are inconvenient and time-consuming.

[0004] Therefore, it is necessary to provide an electric heating device for a valve to solve the problems mentioned in the above background art. Content of the Utility Model

[0005] To achieve the above object, the utility model provides the following technical solution: An electric heating device for a valve, comprising: a shell and a heating device. Through holes corresponding to the valve structure are respectively formed in the top end and two opposite side surfaces of the shell by penetrating its wall surface. It is characterized in that the shell comprises a first shell and a second shell that evenly divide each through hole along its axis, and the lower ends of the first shell and the second shell are hinged;

[0006] Extension parts are respectively arranged on both sides of the splicing seam of the first shell and the second shell, and the extension parts are respectively arranged corresponding to the through holes on the two opposite side surfaces;

[0007] At least two groups of locking devices are arranged at the upper end of the shell. The locking device comprises a plugging part and a locking part, and the plugging part and the locking part are respectively installed on the first shell and the second shell for quickly disassembling and assembling the shell.

[0008] Preferably, the heating device comprises heating wires arranged inside the shell and the extension parts. The heating wires are respectively arranged inside the first shell and its corresponding extension part, and inside the second shell and its corresponding extension part, and the heating wires are arranged in an S shape from top to bottom. Electric connection terminals are respectively arranged at the outer ends of the first shell and the second shell corresponding to the heating wires.

[0009] Preferably, the extension part is a semi-circular plate-like structure in cross-section, and a high-temperature resistant flexible sealing layer is arranged inside the end of the extension part far away from the shell.

[0010] Preferably, a splicing groove is formed on the splicing surface of the first housing and its corresponding extension portion, and a splicing rib corresponding to the splicing groove is arranged on the splicing surface of the second housing and its corresponding extension portion. The splicing groove and the splicing rib are arranged along the splicing surface track of the first housing, the second housing and the extension portion.

[0011] Preferably, the locking portion includes: a lock housing which is installed on the upper end of the second housing near one side of the splicing rib. An installation cavity is formed in the lock housing along its extending direction. A plugging hole and a limiting hole are respectively formed at both ends of the installation cavity through the wall of the lock housing. The plugging hole faces the plugging portion. A pull rod is slidably arranged in the limiting hole. One end of the pull rod located in the installation cavity is installed with a sliding block. The sliding block is elastically connected with one end of the installation cavity near the limiting hole through a support spring.

[0012] A chute is formed at one end of the sliding block away from the limiting hole. A positioning plate is arranged at an interval from the sliding block away from the limiting hole. The positioning plate is fixedly arranged on the inner wall of the installation cavity. Limiting arms are symmetrically arranged at both ends of the positioning plate along the extending direction of the chute. The body of the limiting arm is rotatably connected with the positioning plate, and a sliding column is rotatably arranged at one end of the limiting arm close to the chute. The sliding column is slidably and limitedly arranged in the chute.

[0013] Preferably, a plurality of straight grooves are axially formed on the inner wall of the limiting hole, and a plurality of locking blocks corresponding to the straight grooves are arranged on the rod body of the pull rod.

[0014] Preferably, the limiting arm is of a crank arm structure and is arranged at an obtuse angle. A stop block is arranged at one end of the limiting arm close to the plugging hole.

[0015] Preferably, the plugging portion includes: a fixed housing and a plugging rod. The fixed housing is installed on the upper end of the first housing near one side of the splicing groove. The plugging rod is fixedly arranged on the fixed housing and is arranged corresponding to the plugging hole. A limiting ring groove is formed on the rod body of the plugging rod close to the plugging head.

[0016] Wherein, when the housing is installed, the limiting ring groove is in a blocking fit with the stop block.

[0017] Preferably, a guiding surface is arranged at the plugging fit surface of the stop block and the plugging head of the plugging rod.

[0018] Preferably, an elastic resistance increasing layer is arranged on the blocking surface of the stop block and the limiting ring groove.

[0019] Compared with the prior art, the utility model provides a valve electric heating device, which has the following beneficial effects:

[0020] In the present utility model, by providing a first housing and a second housing that are hinged to each other and a locking device, the plugging part and the locking part of the locking device are used for quick locking and unlocking, so as to achieve quick disassembly and assembly of the heating device; and a locking block, a pull rod, etc. are provided, such that when the pull rod is rotated, the locking block and the outer end face of the lock housing can form a blocking limit to further strengthen the installation tightness between the first housing 1 and the second housing 2. Description of the Drawings

[0021] Figure 1 is a schematic diagram of the overall structure of a valve electric heating device;

[0022] Figure 2 is a schematic diagram of the opened structure of a valve electric heating device;

[0023] Figure 3 is a schematic diagram of the sectional structure of the locking part of a valve electric heating device;

[0024] Figure 4 is a schematic diagram of the locking structure of the locking device of a valve electric heating device;

[0025] Figure 5 is a schematic diagram of the unlocking structure of the locking device of a valve electric heating device;

[0026] In the figures: 1, first housing; 2, second housing; 3, extension part; 4, heating wire; 41, power connection terminal; 5, locking device; 6, sealing layer; 7, splicing groove; 8, splicing rib; 9, lock housing; 10, installation cavity; 11, plugging hole; 12, limiting hole; 13, pull rod; 14, slider; 15, sliding groove; 16, supporting spring; 17, limiting arm; 18, sliding column; 19, positioning plate; 20, locking block; 21, plugging rod; 22, limiting ring groove. Detailed Embodiment

[0027] Please refer to Figures 1-5 , the present utility model provides a valve electric heating device, including: a housing and a heating device, through holes corresponding to the valve structure are respectively formed in the top end and two opposite side surfaces of the housing by penetrating through its wall surface, and it is characterized in that the housing includes a first housing 1 and a second housing 2 that divide each of the through holes along its axis, and the lower ends of the first housing 1 and the second housing 2 are hinged;

[0028] Extension parts 3 are respectively arranged on both sides of the splicing seam between the first housing 1 and the second housing 2, and the extension parts 3 are respectively arranged corresponding to the through holes on the two opposite side surfaces;

[0029] At least two groups of locking devices 5 are arranged at the upper end of the housing, and the locking device 5 includes a plugging part and a locking part, and the plugging part and the locking part are respectively installed on the first housing 1 and the second housing 2 for quickly disassembling and assembling the housing.

[0030] It should be noted that the first housing 1, the second housing 2, and the extension part 3 are all made of heat-resistant and heat-insulating materials (such as metal heat-insulating materials, ceramic fibers, etc.). During installation, the first housing 1 is abutted against the side of the valve. Then, the second housing 2 is rotated to be spliced with the first housing 1, and the locking part on the second housing 2 is press-fitted and connected to the plugging part of the first housing 1, thus completing the installation of the heating device. Only one person is required, and the operation is simple, fast, time-saving, and labor-saving.

[0031] Furthermore, the heating device includes heating wires 4 arranged inside the housing and the extension part 3. The heating wires 4 are respectively arranged inside the first housing 1 and its corresponding extension part 3, and inside the second housing 2 and its corresponding extension part 3. And the heating wires 4 are arranged in an S shape from top to bottom. Electric connection terminals 41 are respectively arranged at the outer ends of the first housing 1 and the second housing 2 corresponding to the heating wires 4.

[0032] Furthermore, the extension part 3 has a semi-circular plate-like cross-sectional structure, and a high-temperature resistant flexible sealing layer 6 is arranged inside one end of the extension part 3 far away from the housing.

[0033] Specifically, through the setting of the extension part 3, the two ends of the valve are extended for heating and heat preservation, avoiding insufficient heating of the fluid or medium. The high-temperature resistant flexible sealing layer 6 is a fluororubber layer.

[0034] Furthermore, splicing grooves 7 are formed on the splicing surfaces of the first housing 1 and its corresponding extension part 3, and splicing ridges 8 corresponding to the splicing grooves 7 are arranged on the splicing surfaces of the second housing 2 and its corresponding extension part 3. The splicing grooves 7 and the splicing ridges 8 are arranged along the trajectory of the splicing surfaces of the first housing 1, the second housing 2, and the extension part 3. Through the setting of the splicing grooves 7 and the splicing ridges 8, the heat preservation effect of the housing is improved.

[0035] Furthermore, the locking part includes: a lock housing 9, which is installed on the upper end of the second housing 2 near one side of the splicing ridge 8. An installation cavity 10 is formed inside the lock housing 9 along its extending direction. Plugging holes 11 and limiting holes 12 are respectively formed at both ends of the installation cavity 10 and penetrate through the shell wall of the lock housing 9. The plugging hole 11 faces the plugging part. A pull rod 13 is slidably arranged inside the limiting hole 12. One end of the pull rod 13 located inside the installation cavity 10 is installed with a slider 14, and the slider 14 is elastically connected to one end of the installation cavity 10 close to the limiting hole 12 through a support spring 16;

[0036] One end of the slider 14 away from the limit hole 12 is provided with a chute 15. A positioning plate 19 is arranged at an interval from the slider 14 away from the limit hole 12. The positioning plate 19 is fixed on the inner wall of the installation cavity 10. At both ends of the positioning plate 19 along the extending direction of the chute 15, limiting arms 17 are symmetrically arranged. The body of the limiting arm 17 is rotatably connected to the positioning plate 19, and a sliding column 18 is rotatably arranged at one end of the limiting arm 17 close to the chute 15. The sliding column 18 is slidably limited in the chute 15.

[0037] Further, the plugging part includes: a fixed shell and a plugging rod 21. The fixed shell is installed on the upper end of the first shell 1 close to one side of the splicing groove 7. The plugging rod 21 is fixed on the fixed shell and is arranged corresponding to the plugging hole 11. A limit ring groove 22 is opened on the rod body of the plugging rod 21 close to the plugging head.

[0038] Wherein, when installing the shell, the limit ring groove 22 is in a blocking fit with the block.

[0039] Further, the limiting arm 17 is of an elbow arm structure and is arranged at an obtuse angle. A block is arranged at one end of the limiting arm 17 close to the plugging hole 11.

[0040] Further, a guiding surface is arranged at the plugging fit surface between the block and the plugging head of the plugging rod 21.

[0041] It should be explained that in the natural state, the locking block 20 is located in the straight groove under the elastic force of the support spring 16. At the same time, the limiting arm 17 is in a slightly closed state. When installing the heating device, as the plugging part and the locking part move relatively, the plugging rod 21 extends into the plugging hole and pushes two groups of limiting arms 17 outwards to rotate away from each other, stretching the support spring 16 and opening. When the plugging head passes over the block, under the elastic force of the support spring 16, the two groups of limiting arms 17 rotate towards each other to block and limit the plugging head of the plugging rod 21, completing the installation of the heating device. When disassembling, by pressing the pull rod 13, the blocking limit between the plugging head and the block can be released.

[0042] Specifically, the locking degree between the first shell 1 and the second shell 2 is positively correlated with the elastic coefficient of the support spring 16. The installation cavity 10 is a cylindrical cavity. The positioning plate 19 has the same cross-section as the installation cavity 10, and an avoidance groove is opened in the middle thereof. The two ends of the avoidance groove are rotatably provided with the limiting arms 17.

[0043] Further, a plurality of straight grooves are axially opened on the inner wall of the limit hole 12, and a plurality of locking blocks 20 are arranged on the rod body of the pull rod 13 corresponding to the straight grooves.

[0044] Furthermore, an elastic resistance increasing layer is provided on the stopping surface of the stopper and the limiting ring groove 22.

[0045] It should be explained that, in order to further strengthen the locking degree between the first housing 1 and the second housing 2, after the plug connector is stopped and limited by the stopper, by pulling the pull rod 13, the elastic resistance increasing layer is compressed, so that the locking block 20 slides out of the straight groove, and then the pull rod 13 is rotated to make the locking block 20 form a stopping limit with the outer end surface of the lock housing 9, further improving the installation firmness of the first housing 1 and the second housing 2.

[0046] During specific implementation, the first housing is abutted against the side of the valve, the second housing is rotated to be spliced with the first housing, and the locking part on the second housing is press-fitted on the plug-in part of the first housing. Then, the pull rod is pulled to make the locking block slide out of the straight groove, and then the pull rod is rotated to make the locking block form a stopping limit with the outer end surface of the lock housing, completing the installation of the heating device.

[0047] The above is only the preferred specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, makes equivalent substitutions or changes, and all should be covered by the protection scope of the present utility model.

Claims

1. A valve electric heating device, comprising: A housing and a heating device. Through holes corresponding to valve structures are respectively formed through the wall surfaces at the top end and two opposite side surfaces of the housing. It is characterized in that the housing includes a first housing (1) and a second housing (2) that divide it equally along the axes of the through holes, and the lower ends of the first housing (1) and the second housing (2) are hinged; Extension parts (3) are respectively arranged on both sides of the splicing seam between the first housing (1) and the second housing (2), and the extension parts (3) are respectively arranged corresponding to the through holes on the two opposite side surfaces; At least two groups of locking devices (5) are arranged at the upper end of the housing. The locking device (5) includes a plugging part and a locking part, and the plugging part and the locking part are respectively installed on the first housing (1) and the second housing (2) for quickly disassembling and assembling the housing.

2. The valve electric heating device according to claim 1, characterized in that, The heating device includes heating wires (4) arranged inside the housing and the extension parts (3). The heating wires (4) are respectively arranged in the first housing (1) and the corresponding extension part (3) and in the second housing (2) and the corresponding extension part (3), and the heating wires (4) are arranged in an S shape from top to bottom. Electric connection terminals (41) are respectively arranged corresponding to the heating wires (4) at the outer ends of the first housing (1) and the second housing (2).

3. The electric heating device for a valve according to claim 1, characterized in that, The extension part (3) is a semi-circular plate-like structure in cross section, and a high-temperature resistant flexible sealing layer (6) is arranged on the inner side of the end of the extension part (3) away from the housing.

4. A valve electric heating device according to claim 1, characterized in that, A splicing groove (7) is formed on the splicing surface of the first housing (1) and its corresponding extension part (3), and a splicing rib (8) corresponding to the splicing groove (7) is arranged on the splicing surface of the second housing (2) and its corresponding extension part (3). The splicing groove (7) and the splicing rib (8) are arranged along the splicing surface track of the first housing (1), the second housing (2) and the extension part (3).

5. The valve electric heating device according to claim 4, characterized in that, The locking part includes: a lock housing (9), the lock housing (9) is installed on the upper end of the second housing (2) near one side of the splicing rib (8). An installation cavity (10) is formed inside the lock housing (9) along its extending direction. Plugging holes (11) and limiting holes (12) are respectively formed through the wall of the lock housing (9) at both ends of the installation cavity (10). The plugging hole (11) faces the plugging part, and a pull rod (13) is slidably arranged in the limiting hole (12). A slider (14) is installed at one end of the pull rod (13) located in the installation cavity (10), and the slider (14) is elastically connected to the end of the installation cavity (10) near the limiting hole (12) through a support spring (16); One end of the slider (14) away from the limit hole (12) is provided with a sliding groove (15). A positioning plate (19) is arranged at an interval from the slider (14) away from the limit hole (12). The positioning plate (19) is fixedly arranged on the inner wall of the installation cavity (10). At both ends of the positioning plate (19) along the extending direction of the sliding groove (15), limiting arms (17) are symmetrically arranged. The body of the limiting arm (17) is rotatably connected to the positioning plate (19), and a sliding column (18) is rotatably arranged at one end of the limiting arm (17) close to the sliding groove (15). The sliding column (18) is slidably limited in the sliding groove (15).

6. The electric heating device for a valve according to claim 5, wherein A plurality of straight grooves are axially arranged on the inner wall of the limit hole (12), and a plurality of locking blocks (20) are correspondingly arranged on the rod body of the pull rod (13) at positions corresponding to the straight grooves.

7. The valve electric heating device according to claim 5, wherein The limiting arm (17) is of an elbow arm structure and is arranged at an obtuse angle. A stop block is arranged at one end of the limiting arm (17) close to the insertion hole (11).

8. The valve electric heating device according to claim 7, characterized in that, The insertion part includes: a fixed shell and an insertion rod (21). The fixed shell is installed on the upper end of the first shell (1) close to one side of the splicing groove (7). The insertion rod (21) is fixedly arranged on the fixed shell and is correspondingly arranged with the insertion hole (11). A limiting ring groove (22) is arranged on the rod body of the insertion rod (21) close to the insertion head. Wherein, when installing the shell, the limiting ring groove (22) is in a blocking fit with the stop block.

9. The valve electric heating device according to claim 8, wherein, A guiding surface is arranged at the insertion and matching surface of the stop block and the insertion head of the insertion rod (21).

10. A valve electric heating device according to claim 8, characterized in that, An elastic resistance increasing layer is arranged on the blocking surface of the stop block and the limiting ring groove (22).

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