Explosion-proof externally-attached liquid level switch

Abstract

The utility model relates to the technical field of liquid level switches, and discloses an explosion-proof externally-attached liquid level switch which comprises a sending device, a receiving device arranged below the sending device, a liquid level switch host arranged outside the right side of the sending device, and first protection mechanisms arranged outside the sending device and the receiving device. The sealing gasket and the magnetic disk are connected to the lower surface of the fixing pipe, the first threaded groove is embedded in the edge of the upper surface of the fixing pipe, the shell is in threaded connection with the fixing pipe through the first threaded pipe, the shell is made of anti-explosion metal materials, the sensor is placed above the fixing pipe, and the through hole penetrates through the edge of the upper surface of the sensor. The threaded rod penetrates through the through hole and is screwed into the threaded hole, the sensor and the fixing pipe are installed together, the cable penetrates through the middle of the upper surface of the shell and is connected with the liquid level switch host through the connector and the first threaded head, and therefore the effect of improving the anti-explosion performance of the liquid level switch can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid level switches, in particular to an explosion-proof externally attached liquid level switch. Background Art

[0002] An external liquid level switch is a device used to detect liquid levels. It is usually installed on the outside of a container and has many different types. An ultrasonic external liquid level switch is a liquid level detector based on ultrasonic technology. It measures the distance from the liquid surface to the liquid level switch by emitting and receiving ultrasonic signals, thereby achieving liquid level monitoring and control. It does not require direct contact with the liquid and can work safely and reliably under harsh conditions such as high temperature, high pressure, and corrosion.

[0003] In industrial production, external ultrasonic liquid level switches need to work in explosive gas environments. However, the current external ultrasonic liquid level switches have poor safety and low explosion-proof performance, and are easily damaged in flammable and explosive environments. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the utility model provides an explosion-proof external liquid level switch, which has the advantages of improving the explosion-proof performance of the liquid level switch and solves the problems mentioned in the above background technology.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an explosion-proof external liquid level switch, comprising a sending device, a receiving device is arranged below the sending device, a liquid level switch host is arranged on the right side of the sending device, a first protective mechanism is arranged on the outside of the sending device and the receiving device, a second protective mechanism is arranged on the front and back of the liquid level switch host, a connecting mechanism is arranged below the liquid level switch host, the first protective mechanism comprises a fixed tube, a sealing gasket is fixedly connected at the edge of the lower surface of the fixed tube, a number of magnetic disks are arranged on the lower surface of the fixed tube, a first thread groove is opened at the edge of the upper surface of the fixed tube, a first threaded tube is arranged above the first thread groove, a shell is fixedly connected to the upper surface of the first threaded tube, a sensor is arranged in the middle of the inner part of the shell, a number of through holes are opened on the upper surface of the sensor, a threaded rod is arranged inside the through hole, a number of threaded holes are opened on the upper surface of the fixed tube, a cable is arranged in the middle of the upper surface of the sensor, a connector is fixedly connected to the other end of the cable, and a first threaded head is fixedly connected to the other end of the connector.

[0008] Preferably, the second protective mechanism includes a second thread groove, the number of the second thread grooves is two, the two second thread grooves are respectively opened on the front and back of the liquid level switch host, a second threaded tube is arranged on the outside of one side of the second thread groove, and a protective plate is fixedly connected to one side of the second threaded tube.

[0009] The two second thread grooves are respectively embedded in the front and back of the liquid level switch host, and the second threaded tube performs threaded rotation movement inside the second thread groove. The protective plate can be threadedly connected to the liquid level switch host through the second threaded tube to protect the front and back of the liquid level switch host.

[0010] Preferably, the upper middle part and the lower middle part of the left side and the upper middle part of the right side of the liquid level switch host are fixedly connected with connecting pipes, the inner wall of the connecting pipe is provided with an internal thread, and the right side outside of the upper right side of the connecting pipe is provided with a second threaded head, and one end of the second threaded head is fixedly connected to the power head.

[0011] The connecting pipe is used to connect with the external connecting head and the power supply head. The first threaded head and the second threaded head are threadedly rotated with the connecting pipe, which is convenient for the staff to disassemble and assemble the connecting head and the power supply head.

[0012] Preferably, the connecting mechanism comprises a support rod, the top of the support rod is fixedly connected to the middle of the lower surface of the liquid level switch host, and the bottom of the support rod is fixedly connected to a third threaded head.

[0013] Preferably, a pad is provided below the third threaded head, and a connecting rod is fixedly connected to the middle portion of the lower surface of the pad.

[0014] Preferably, a threaded sleeve is provided on the outside of the connecting rod, and a mounting plate is fixedly connected to the bottom of the connecting rod.

[0015] The top of the support rod is vertically connected to the middle of the lower surface of the liquid level switch host, the pad and the third threaded head correspond to each other, the top of the connecting rod is vertically connected to the middle of the lower surface of the pad, and the bottom is vertically connected to the middle of the upper surface of the mounting plate. The threaded sleeve can slide up and down on the outside of the connecting rod and perform threaded rotation movement with the third threaded head to connect the liquid level switch host and the mounting plate together.

[0016] Compared with the prior art, the utility model provides an explosion-proof external liquid level switch, which has the following beneficial effects:

[0017] 1. The utility model connects the sealing gasket and the magnetic disk through the lower surface of the fixed tube, the first threaded groove is embedded in the edge of the upper surface of the fixed tube, the shell is threadedly connected to the fixed tube through the first threaded tube, the shell is made of explosion-proof metal material, the sensor is placed above the fixed tube, the through hole runs through the edge of the upper surface of the sensor, and corresponds to the threaded hole, the threaded rod passes through the through hole and is screwed inside the threaded hole, the sensor and the fixed tube are installed together, the cable passes through the middle of the upper surface of the shell, and is connected to the liquid level switch host through the connector and the first threaded head, thereby achieving the effect of improving the explosion-proof performance of the liquid level switch.

[0018] 2. The utility model connects the support rod and the third threaded head to the lower surface of the liquid level switch host, the pad and the third threaded head are parallel to each other, the top of the connecting rod is vertically connected to the middle of the lower surface of the pad, the threaded sleeve can slide up and down on the outside of the connecting rod, and is threadedly connected to the third threaded head to connect the liquid level switch host to the mounting plate, thereby facilitating the disassembly and assembly of the liquid level switch host. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a bottom view structural schematic diagram of the utility model;

[0021] Figure 3 This is a schematic diagram of the internal structure of the sending device and the receiving device of the utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the main unit of the liquid level switch of the utility model.

[0023] Wherein: 1. sending device; 101. receiving device; 102. liquid level switch host; 2. first protection mechanism; 201. fixing tube; 202. sealing gasket; 203. magnetic disk; 204. first thread groove; 205. first thread tube; 206. shell; 207. sensor; 208. through hole; 209. threaded rod; 210. threaded hole; 211. cable; 212. connector; 213. first thread head; 3. second protection mechanism; 301. second thread groove; 302. second thread tube; 303. protection plate; 304. connecting tube; 305. internal thread; 306. second thread head; 307. power supply head; 4. connecting mechanism; 401. supporting rod; 402. third thread head; 403. pad; 404. connecting rod; 405. threaded sleeve; 406. mounting plate. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0025] See also Figure 1-4 An explosion-proof external liquid level switch comprises a sending device 1, a receiving device 101 is arranged below the sending device 1, a liquid level switch host 102 is arranged on the right side of the sending device 1, a first protection mechanism 2 is arranged outside the sending device 1 and the receiving device 101, a second protection mechanism 3 is arranged on the front and back of the liquid level switch host 102, a connecting mechanism 4 is arranged below the liquid level switch host 102, the first protection mechanism 2 comprises a fixed tube 201, a sealing gasket 202 is fixedly connected to the edge of the lower surface of the fixed tube 201, and a plurality of The magnetic disk 203 is provided with a first thread groove 204 at the edge of the upper surface of the fixed tube 201, and a first threaded tube 205 is provided above the first thread groove 204. The upper surface of the first threaded tube 205 is fixedly connected with a housing 206, and a sensor 207 is provided in the middle of the inner part of the housing 206. A number of through holes 208 are provided on the upper surface of the sensor 207, and a threaded rod 209 is provided inside the through hole 208. A number of threaded holes 210 are provided on the upper surface of the fixed tube 201, and a cable 211 is provided in the middle of the upper surface of the sensor 207, and the other end of the cable 211 is fixedly connected to the upper surface of the sensor 207. The first threaded head 213 is fixedly connected to the connecting head 212, and the other end of the connecting head 212 is fixedly connected to the first threaded head 213. The ultrasonic signal is sent by the sending device 1, and then the receiving device 101 receives the ultrasonic signal reflected from the liquid surface, and converts the received signal into a readable form and transmits it to the liquid level switch host 102. The sealing gasket 202 can improve the sealing of the device during installation. The magnetic disk 203 facilitates the staff to install the sending device 1 and the receiving device 101. The first threaded groove 204 is embedded in the upper surface edge of the fixed tube 201, and the first threaded tube 205 and the first threaded groove 2 04, the housing 206 can be threadedly connected to the fixed tube 201 through the first threaded tube 205, which is convenient for disassembly and assembly. The through hole 208 passes through the edge of the upper surface of the sensor 207, the threaded hole 210 is embedded in the upper surface of the fixed tube 201, the threaded rod 209 passes through the inside of the through hole 208, and is screwed into the inside of the threaded hole 210, so that the sensor 207 and the fixed tube 201 are installed together, and the cable 211 passes through the middle of the upper surface of the housing 206, and is connected to the liquid level switch host 102 through the connector 212 and the first threaded head 213.

[0026] Specifically, Figure 4 As shown, the second protective mechanism 3 includes a second thread groove 301, the number of the second thread groove 301 is two, the two second thread grooves 301 are respectively opened on the front and back of the liquid level switch host 102, a second threaded tube 302 is arranged on the outside of one side of the second thread groove 301, and a protective plate 303 is fixedly connected to one side of the second threaded tube 302.

[0027] Through the above technical solution, the two second thread grooves 301 are respectively embedded in the front and back of the liquid level switch host 102, and the second threaded tube 302 performs threaded rotation movement inside the second thread groove 301. The protective plate 303 can be threadedly connected to the liquid level switch host 102 through the second threaded tube 302 to protect the front and back of the liquid level switch host 102.

[0028] Specifically, Figure 4 As shown, the upper middle part and lower middle part of the left side and the upper middle part of the right side of the liquid level switch host 102 are fixedly connected with a connecting pipe 304, the inner wall of the connecting pipe 304 is provided with an internal thread 305, and the right side outside of the upper right connecting pipe 304 is provided with a second thread head 306, and one end of the second thread head 306 is fixedly connected to a power supply head 307.

[0029] Through the above technical solution, the connecting tube 304 is used to connect with the external connecting head 212 and the power head 307, and the first threaded head 213 and the second threaded head 306 are threadedly rotated with the connecting tube 304, which is convenient for the staff to disassemble and assemble the connecting head 212 and the power head 307.

[0030] Specifically, Figure 4 As shown, the connecting mechanism 4 includes a support rod 401, the top of the support rod 401 is fixedly connected to the middle of the lower surface of the liquid level switch host 102, the bottom of the support rod 401 is fixedly connected with a third threaded head 402, a pad 403 is arranged below the third threaded head 402, a connecting rod 404 is fixedly connected to the middle of the lower surface of the pad 403, a threaded sleeve 405 is arranged on the outside of the connecting rod 404, and the bottom of the connecting rod 404 is fixedly connected with a mounting plate 406.

[0031] Through the above technical solution, the top of the support rod 401 is vertically connected to the middle of the lower surface of the liquid level switch host 102, the pad 403 and the third threaded head 402 correspond to each other, the top of the connecting rod 404 is vertically connected to the middle of the lower surface of the pad 403, and the bottom is vertically connected to the middle of the upper surface of the mounting plate 406. The threaded sleeve 405 can slide up and down on the outside of the connecting rod 404 and perform threaded rotation movement between the third threaded head 402 to connect the liquid level switch host 102 and the mounting plate 406 together.

[0032] When in use, the staff installs the fixed tube 201 at a suitable position through the magnetic disk 203 on the lower surface, and then places the sensor 207 in the middle of one side surface of the fixed tube 201 so that the through hole 208 and the threaded hole 210 correspond to each other, passes the threaded rod 209 through the through hole 208 and screws it into the inside of the threaded hole 210, installs the sensor 207, screws the housing 206 onto the outside of the first threaded groove 204 through the first threaded tube 205 at the bottom, covers the sensor 207, and inserts the connector 212 through the first threaded head 213 is screwed into the inside of the connecting pipe 304, the sending device 1 and the receiving device 101 are connected to the liquid level switch host 102, and then the power supply head 307 is connected to the liquid level switch host 102 through the second threaded head 306. Finally, the mounting plate 406 is installed at a suitable position, the third threaded head 402 at the bottom of the liquid level switch host 102 is attached to the upper surface of the pad 403, the threaded sleeve 405 is screwed onto the outside of the third threaded head 402, and the liquid level switch host 102 is connected to the mounting plate 406.

[0033] 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. An explosion-proof external liquid level switch, comprising a transmitting device (1), characterized in that: A receiving device (101) is arranged below the sending device (1), a liquid level switch host (102) is arranged on the right side of the sending device (1), a first protective mechanism (2) is arranged on the outside of the sending device (1) and the receiving device (101), a second protective mechanism (3) is arranged on the front and back of the liquid level switch host (102), a connecting mechanism (4) is arranged below the liquid level switch host (102), the first protective mechanism (2) comprises a fixed tube (201), a sealing gasket (202) is fixedly connected at the edge of the lower surface of the fixed tube (201), a plurality of magnetic disks (203) are arranged on the lower surface of the fixed tube (201), and a first thread groove is provided at the edge of the upper surface of the fixed tube (201). (204), a first threaded tube (205) is arranged above the first threaded groove (204), a housing (206) is fixedly connected to the upper surface of the first threaded tube (205), a sensor (207) is arranged in the middle of the inner part of the housing (206), a number of through holes (208) are opened on the upper surface of the sensor (207), a threaded rod (209) is arranged inside the through hole (208), a number of threaded holes (210) are opened on the upper surface of the fixed tube (201), a cable (211) is arranged in the middle of the upper surface of the sensor (207), the other end of the cable (211) is fixedly connected to a connector (212), and the other end of the connector (212) is fixedly connected to a first threaded head (213).

2. The explosion-proof external liquid level switch according to claim 1, characterized in that: The second protection mechanism (3) comprises a second thread groove (301), the number of the second thread groove (301) is two, the two second thread grooves (301) are respectively arranged on the front and back of the liquid level switch host (102), a second thread tube (302) is arranged on the outside of one side of the second thread groove (301), and a protection plate (303) is fixedly connected to one side of the second thread tube (302).

3. The explosion-proof external liquid level switch according to claim 1, characterized in that: A connecting pipe (304) is fixedly connected to the upper middle part and lower middle part of the left side and the upper middle part of the right side of the liquid level switch host (102); an inner wall of the connecting pipe (304) is provided with an internal thread (305); a second thread head (306) is provided on the right side of the upper right side of the connecting pipe (304); one end of the second thread head (306) is fixedly connected to a power supply head (307).

4. The explosion-proof external liquid level switch according to claim 1, characterized in that: The connection mechanism (4) comprises a support rod (401), the top of the support rod (401) is fixedly connected to the middle of the lower surface of the liquid level switch host (102), and the bottom of the support rod (401) is fixedly connected to a third threaded head (402).

5. The explosion-proof external liquid level switch according to claim 4, characterized in that: A pad (403) is provided below the third threaded head (402), and a connecting rod (404) is fixedly connected to the middle portion of the lower surface of the pad (403).

6. The explosion-proof external liquid level switch according to claim 5, characterized in that: A threaded sleeve (405) is disposed outside the connecting rod (404), and a mounting plate (406) is fixedly connected to the bottom of the connecting rod (404).

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