Explosion-proof thermal flow switch

Abstract

The utility model relates to the technical field of thermal flow switches, and discloses a flame-proof thermal flow switch which comprises a transmission cylinder, a sealing cover, a thermal flow switch body, a probe rod, a connecting assembly, an adjusting hose and a connector, the top of the transmission cylinder is movably connected with the sealing cover, and the thermal flow switch body is fixedly installed at the bottom of the sealing cover. The thermal flow switch has the advantages that through cooperation of the connecting assembly, the adjusting hose and the connector, the adjusting hose is convenient to mount and dismount through the connecting assembly and convenient to replace through the connecting assembly, the mounting distance can be adjusted through the adjusting hose, and the thermal flow switch is convenient to use. The adjusting hose can be installed on the surface of a pipeline through the connector, gas or liquid is led into the flow switch through connection of the adjusting hose, the influence of knocking in the pipeline on the flow switch can be avoided through the non-contact installation mode, and the use safety of the flame-proof thermal flow switch is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal flow switches, in particular to a flameproof thermal flow switch. Background Art

[0002] When the thermal flow switch is working, the heating sensor emits a constant amount of heat. When there is no medium flowing in the pipeline, the heat received by the thermal sensor is a constant value. When there is medium flowing, the heat received by the thermal sensor will change with the flow rate of the medium. The thermal sensor converts this temperature difference signal into an electrical signal. When the flow rate reaches a certain set point, the thermal flow switch outputs a switch signal.

[0003] Chinese patent CN218004661U proposes a new explosion-proof flow switch, wherein the shell is installed on the top of the circular plate, a plug hole is provided on the surface of the circular plate, the protective shell passes through the plug hole, the protective shell is provided on the surface of the shell, a slot is provided on the surface of the protective shell, the positioning assembly comprises a positioning block, a positioning plate and a clamping plate, a plug block is provided on one side of the clamping plate, the positioning block is provided on both sides of the bottom of the circular plate, a bidirectional screw is rotatably installed inside the positioning block, the positioning plate is provided on both sides of the bottom of the circular plate, the two ends of the bidirectional screw are respectively fixed to the adjacent positioning plates, a limiting rod is installed between the adjacent positioning plates, the clamping plate is threadedly sleeved on the surface of the bidirectional screw, the clamping plate is also slidably sleeved on the surface of the limiting rod, the plug The block is inserted into the slot, the plug block is arranged corresponding to the slot, and a handle is arranged at one end of the bidirectional screw. When in use, the operator connects and installs the protective shell through the arranged jack, so that the protective shell can be located outside the shell, and the operator can drive the bidirectional screw to rotate by rotating the handle, and then the clamps on both sides move on the limit rod, and the plug block on the clamp plate is smoothly connected and fixed to the slot, so that the protective shell can be locked and fixed between the clamp plates, effectively avoiding the protective cover from falling off, thereby ensuring the protection effect of the flow switch, but the above scheme needs to be fixedly connected to the pipeline, so that the explosion inside the pipeline will affect the flow switch, which is easy to cause the explosion of the thermal flow switch, thereby reducing the practicability of the explosion-proof thermal flow switch. Utility Model Content

[0004] The purpose of the utility model is to provide a flameproof thermal flow switch in order to solve the above-mentioned problems. The device utilizes the cooperation between the connecting components, the adjusting hose and the connector to introduce the gas or liquid into the flow switch. The non-contact installation method can avoid the influence of the explosion inside the pipeline on the flow switch, thus solving the problems mentioned in the background technology.

[0005] In order to solve the above problems, the utility model provides a technical solution:

[0006] A flameproof thermal flow switch comprises a transmission cylinder, a sealing cover, a thermal flow switch body, a probe rod, a connecting assembly, an adjusting hose and a connector, wherein the top of the transmission cylinder is movably connected with the sealing cover, the bottom of the sealing cover is fixedly mounted with the thermal flow switch body, the bottom of the thermal flow switch body is movably connected with the probe rod, connecting assemblies are symmetrically arranged on both sides of the transmission cylinder, adjusting hoses are fixedly mounted on one side of two connecting assemblies, and connectors are fixedly mounted on one side of two adjusting hoses.

[0007] As a preferred solution of the utility model, a sealing gasket is fixedly installed on the bottom of the sealing cover, a fixing component is symmetrically arranged on the top of the transmission cylinder, a replacement component is arranged inside the thermal flow switch body, and a display meter is fixedly installed on the top of the sealing cover.

[0008] As a preferred solution of the utility model, the connecting assembly includes a connecting tube, and the two connecting tubes are symmetrically fixedly installed on both sides of the transmission cylinder, and a connecting head is fixedly installed on one side of the two connecting tubes, and a card groove is opened at the outer end of the connecting head.

[0009] As a preferred solution of the utility model, the two connectors are fixedly installed with filter screens inside, and the outer ends of the two connectors are movably connected with connecting tubes, the connecting tubes are fixedly installed with thermal expansion and contraction rings inside, and the connecting tubes and the adjusting hoses are fixedly connected.

[0010] As a preferred solution of the utility model, the fixing assembly includes a rotating shaft, the two rotating shafts are fixedly installed inside the transmission cylinder, and the outer ends of the two rotating shafts are fixedly installed with torsion springs, the top ends of the rotating shafts are fixedly installed with pressing plates, and the pressing plates and the sealing cover are movably connected.

[0011] As a preferred solution of the utility model, the replacement assembly includes a threaded rod, which is fixedly installed on the top of the probe rod, a transmission plate is fixed on the top of the threaded rod, the outer ends of the threaded rods are threadedly connected with threaded barrels, and the threaded barrels are fixedly connected to the inside of the thermal flow switch body.

[0012] The beneficial effects of the utility model are as follows: by setting the cooperation between the connection component, the adjustment hose and the connector, the connection component is convenient for installing and disassembling the adjustment hose, and is convenient for replacing the adjustment hose. The adjustment hose can adjust the installation distance. The connector can install the adjustment hose on the pipeline surface. Through the adjustment hose connection, gas or liquid is introduced into the flow switch. The non-contact installation method can avoid the influence of explosion inside the pipeline on the flow switch, thereby improving the safety of the use of the explosion-proof thermal flow switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] For ease of explanation, the present invention is described in detail by the following specific implementations and drawings.

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the structure of the replacement component of the utility model;

[0016] Figure 3 It is a schematic diagram of the structure of the connection assembly of the utility model;

[0017] Figure 4 It is a schematic diagram of the structure of the fixing assembly of the utility model.

[0018] In the figure: 1. transmission cylinder; 2. sealing cover; 3. thermal flow switch body; 4. probe rod; 5. connection assembly; 51. connecting pipe; 52. connecting head; 53. slot; 54. filter screen; 55. connection cylinder; 56. thermal expansion and contraction ring; 6. adjusting hose; 7. connector; 8. sealing gasket; 9. fixing assembly; 91. rotating shaft; 92. torsion spring; 93. pressing plate; 10. replacement assembly; 101. threaded rod; 102. transmission sheet; 103. threaded cylinder; 11. display meter. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0020] Example

[0021] See also Figure 1 - Figure 4 The utility model provides a technical solution: a flameproof thermal flow switch, comprising a transmission cylinder 1, a sealing cover 2, a thermal flow switch body 3, a probe rod 4, a connecting assembly 5, an adjusting hose 6 and a connector 7, the top of the transmission cylinder 1 is movably connected with the sealing cover 2, the bottom of the sealing cover 2 is fixedly installed with the thermal flow switch body 3, the bottom of the thermal flow switch body 3 is movably connected with the probe rod 4, the two sides of the transmission cylinder 1 are symmetrically provided with connecting assemblies 5, one side of the two connecting assemblies 5 is fixedly installed with an adjusting hose 6, the material of the adjusting hose 6 is a stainless steel hose, and one side of the two adjusting hoses 6 is fixedly installed with a connector 7, the connector 7 and the connecting assembly 5 have the same principle.

[0022] Furthermore, a sealing gasket 8 is fixedly installed at the bottom of the sealing cover 2, and the material of the sealing gasket 8 is silicone. A fixing component 9 is symmetrically arranged on the top of the transmission tube 1, a replacement component 10 is arranged inside the thermal flow switch body 3, and a display meter 11 is fixedly installed on the top of the sealing cover 2.

[0023] Furthermore, the connecting assembly 5 includes a connecting tube 51, the material of the connecting tube 51 is PE, the two connecting tubes 51 are symmetrically fixedly installed on both sides of the transmission tube 1, and a connecting head 52 is fixedly installed on one side of the two connecting tubes 51, and a card slot 53 is opened at the outer end of the connecting head 52.

[0024] Furthermore, a filter screen 54 is fixedly installed inside the two connecting heads 52, and the filter screen 54 is convenient for filtering impurities, and the outer ends of the two connecting heads 52 are movably connected with a connecting tube 55, and a thermal expansion and contraction ring 56 is fixedly installed inside the connecting tube 55. The size of the slot 53 and the thermal expansion and contraction ring 56 are adapted, and the connecting tube 55 and the adjusting hose 6 are fixedly connected.

[0025] Furthermore, the fixed component 9 includes a rotating shaft 91, and the two rotating shafts 91 are fixedly installed inside the transmission cylinder 1, and the outer ends of the two rotating shafts 91 are fixedly installed with torsion springs 92. When other components rotate around the center of the spring, the torsion spring 92 pulls them back to the initial position to generate torque or rotational force. The top of the rotating shaft 91 is fixedly installed with a pressing plate 93, and the pressing plate 93 and the sealing cover 2 are movably connected.

[0026] Furthermore, the replacement component 10 includes a threaded rod 101, which is fixedly installed on the top of the probe rod 4. A transmission plate 102 is fixed on the top of the threaded rod 101. The outer ends of the threaded rods 101 are threadedly connected with threaded barrels 103. The threaded rods 101 and the threaded barrels 103 are easy to install and disassemble, and the replacement of the probe rod 4 is more convenient. The threaded barrel 103 is fixedly connected to the inside of the thermal flow switch body 3.

[0027] To sum up: first, insert the probe rod 4 into the interior of the thermal flow switch body 3, insert the threaded rod 101 into the interior of the threaded barrel 103, rotate the probe rod 4, fix the threaded rod 101 and the threaded barrel 103, pull the pressing plate 93, insert the thermal flow switch body 3 under the sealing cover 2 into the interior of the transmission barrel 1, release the pulling hand, the rotating shaft 91 rebounds with the help of the elastic force of the torsion spring 92, and the rotating shaft 91 drives the pressing plate 93 to adjust, adjust the pressing plate 93 to the top of the sealing cover 2, fix the sealing cover 2 with the pressing plate 93, insert the connecting tube 55 into the outer end of the connecting head 52, cool the thermal expansion and contraction circle 56, shrink the thermal expansion and contraction circle 56 to the inside of the card slot 53, fix the connecting pipe 51 and the thermal expansion and contraction circle 56, and then place the transmission barrel 1 on one side of the pipeline, use the adjusting hose 6 to adjust the connector 7 to one side of the pipeline for connection.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flameproof thermal flow switch, characterized in that: The invention comprises a transmission cylinder (1), a sealing cover (2), a thermal flow switch body (3), a probe rod (4), a connecting assembly (5), an adjusting hose (6) and a connector (7), wherein the top of the transmission cylinder (1) is movably connected to the sealing cover (2), the bottom of the sealing cover (2) is fixedly mounted with the thermal flow switch body (3), the bottom of the thermal flow switch body (3) is movably connected with the probe rod (4), the connecting assemblies (5) are symmetrically arranged on both sides of the transmission cylinder (1), the adjusting hose (6) is fixedly mounted on one side of the two connecting assemblies (5), and the connector (7) is fixedly mounted on one side of the two adjusting hoses (6).

2. The flameproof thermal flow switch according to claim 1, characterized in that: A sealing gasket (8) is fixedly installed at the bottom of the sealing cover (2), a fixing component (9) is symmetrically arranged on the top of the transmission cylinder (1), a replacement component (10) is arranged inside the thermal flow switch body (3), and a display meter (11) is fixedly installed on the top of the sealing cover (2).

3. The flameproof thermal flow switch according to claim 1, characterized in that: The connection assembly (5) comprises a connection tube (51), wherein the two connection tubes (51) are symmetrically fixedly mounted on both sides of the transmission cylinder (1), and a connection head (52) is fixedly mounted on one side of the two connection tubes (51), and a card slot (53) is provided at the outer end of the connection head (52).

4. The flameproof thermal flow switch according to claim 3, characterized in that: A filter screen (54) is fixedly installed inside the two connectors (52), and a connecting tube (55) is movably connected to the outer ends of the two connectors (52). A thermal expansion and contraction ring (56) is fixedly installed inside the connecting tube (55), and the connecting tube (55) and the regulating hose (6) are fixedly connected.

5. The flameproof thermal flow switch according to claim 2, characterized in that: The fixing assembly (9) comprises a rotating shaft (91), wherein the two rotating shafts (91) are fixedly mounted inside the transmission cylinder (1), and the outer ends of the two rotating shafts (91) are fixedly mounted with a torsion spring (92), and the top ends of the rotating shafts (91) are fixedly mounted with a pressing plate (93), and the pressing plate (93) is movably connected to the sealing cover (2).

6. The flameproof thermal flow switch according to claim 2, characterized in that: The replacement assembly (10) comprises a threaded rod (101), wherein the threaded rod (101) is fixedly mounted on the top of the probe rod (4), a transmission sheet (102) is fixed to the top of the threaded rod (101), the outer ends of the threaded rod (101) are threadedly connected to threaded barrels (103), and the threaded barrels (103) are fixedly connected to the inside of the thermal flow switch body (3).

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