Waterproof joint for ultrasonic liquid level meter and liquid level measuring device

Abstract

The utility model discloses a waterproof joint for ultrasonic level gauge and liquid level measuring device, the waterproof joint for ultrasonic level gauge comprises a joint main body and a driving mechanism, the joint main body comprises a connecting pipe and a plurality of petals, all petals are arranged annularly and are connected with one end of the connecting pipe, and the other end of the connecting pipe is connected with the driving mechanism. A clamping channel coaxial with the connecting pipe is defined by the petals, and the petals are of a deformable structure. The beneficial effects of the utility model are that through the mutual folding of the abutting members, the segments are pushed to be folded inwards, the clamping and fixing of the cable are realized, through the mutual separation of the abutting members, the abutting members can be separated from the corresponding segments respectively, the fixation of the segments is released, and the clamping and fixing of the cable are realized. The cable is prevented from being fixed by adopting a traditional threaded connection mode, so that the problem that the cable is difficult to take out or cannot be taken out when internal and external threads are damaged due to corrosion is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid level measurement, in particular to a waterproof joint for an ultrasonic liquid level meter and a liquid level measuring device. Background Art

[0002] In wastewater treatment, it's necessary to measure the liquid level within a tank. This is typically done with an ultrasonic level meter. When measuring the level of a tank, an ultrasonic level meter emits an ultrasonic pulse from a sensor. After reflecting off the liquid surface, the ultrasonic pulse is received by the sensor and converted into an electrical signal by a piezoelectric crystal. The time difference between the transmission and reception of the ultrasonic pulse is used to calculate the distance between the sensor and the liquid surface. In order to improve the waterproof performance of the ultrasonic level meter, a waterproof connector is generally used to connect the cable to the ultrasonic level meter. When using the existing waterproof connector (such as a cable waterproof connector disclosed in application number 202222252716.3), one end of the connector body is connected to the opening on the shell of the ultrasonic level meter, the cable is passed through the connector body and the opening on the shell, the tightening head is screwed onto the other end of the connector body, and the clamping strip is squeezed inward by the tightening head to fix the cable. When the ultrasonic level meter fails and needs to be repaired, the cable is first removed from the ultrasonic level meter and the waterproof connector, and then the ultrasonic level meter is repaired. To remove the cable from the waterproof connector, it is necessary to first separate the tightening head from the connector body. Since the tightening head and the connector body are threadedly connected, when the internal and external threads are damaged due to corrosion, this connection method easily makes it difficult to separate the tightening head from the connector body, or even makes it impossible to separate the tightening head from the connector body. Utility Model Content

[0003] The purpose of the present invention is to overcome the above-mentioned technical deficiencies and propose a waterproof connector for an ultrasonic liquid level meter and a liquid level measuring device, so as to solve the technical problem that in the prior art, the tightening head and the connector body of the waterproof connector are connected by threads, and when the internal and external threads are damaged due to corrosion, this connection method easily makes it difficult or even impossible to separate the tightening head and the connector body.

[0004] To achieve the above technical objectives, the technical solution of the present utility model provides a waterproof connector for an ultrasonic level gauge, comprising:

[0005] The connector body includes a connecting tube and a plurality of petals, each of which is circumferentially arranged and connected to one end of the connecting tube. Each of the petals encloses a clamping channel coaxial with the connecting tube, and each petal has a deformable structure.

[0006] The driving mechanism includes a plurality of abutments and a driving assembly, wherein each abutment is respectively arranged on the outer side of the corresponding petal, and the driving assembly is connected to each abutment and is used to drive each abutment to retract or separate from each other, so that each abutment pushes the corresponding petal inward to retract.

[0007] Furthermore, the joint body also includes an insertion tube and a retaining ring. The insertion tube is used to seal and slide into the connecting tube along one end of the connecting tube. The retaining ring is coaxially fixed to one end of the insertion tube and is used to tighten the end face of one end of the connecting tube. One end of each of the petals is fixed to the retaining ring.

[0008] Furthermore, the driving mechanism also includes a mounting tube, which is sleeved on the connecting tube, the retaining ring and each of the petals, and is detachably fixed to the connecting tube. A plurality of guide holes are circumferentially opened on the mounting tube, all of which extend radially along the mounting tube. Each of the guide holes corresponds one-to-one to each of the petals, and each of the retaining members slides through the corresponding guide hole.

[0009] Furthermore, the abutment member is a rod-shaped structure.

[0010] Furthermore, the driving assembly includes a driving ring, a plurality of guide posts and a plurality of elastic members, the driving ring is rotatably sleeved on the mounting tube, a plurality of guide grooves are circumferentially opened on the driving ring, each of the guide grooves is radial and has an arc-shaped structure, each of the guide posts is arranged along the axial direction of the mounting tube, one end of each guide post is slidably arranged in the corresponding guide groove, the other end of each guide post is fixedly connected to the outer end of the corresponding abutment, each elastic member is sleeved on the corresponding abutment, the two ends of the elastic member are respectively fixedly connected to the outer ends of the mounting tube and the abutment, and are used to drive the inner end of the abutment to move into the mounting tube, so that the inner end of each abutment pushes the other end of the corresponding petal to retract inward, and the other end of each petal clamps the cable.

[0011] Furthermore, the mounting tube includes a tube body and two clamping rings, the two clamping rings are fixedly sleeved on the tube body, a clamping groove is formed between the two clamping rings, and the driving ring is rotatably clamped in the clamping groove.

[0012] Furthermore, the elastic member is a spring.

[0013] Furthermore, the drive assembly also includes a locking piece, a first locking hole is provided on the drive ring, and second locking holes corresponding to each other are provided on the two retaining rings. When the inner ends of each of the abutting pieces are moved into the guide holes, the first locking hole is connected with the two second locking holes, and the locking piece is inserted into the first locking hole and the two second locking holes.

[0014] On the other hand, the utility model also provides a liquid level measuring device, including a bracket, an ultrasonic liquid level meter body and the above-mentioned waterproof joint for the ultrasonic liquid level meter, the ultrasonic liquid level meter body including a shell, a fixed tube and a measuring component, the shell is detachably fixed on the bracket, the shell has a cavity, one end of the fixed tube is connected to the cavity, the other end of the connecting tube is used to be detachably connected to the other end of the fixed tube, and the measuring component is arranged in the cavity.

[0015] Furthermore, the bracket includes a frame and a pad, the frame is an L-shaped structure, the vertical plate of the frame is fixedly connected to the pool wall, the horizontal plate of the frame is provided with a first mounting port, the pad has an elastic structure, and the pad is provided with a second mounting port, the pad is detachably fixed to the horizontal plate of the frame, and the second mounting port is connected to the first mounting port, the bottom of the shell has a protrusion, the protrusion is placed in the second mounting port and the first mounting port, and the bottom surface of the shell abuts against the surface of the pad.

[0016] Compared with the prior art, the beneficial effects of the present invention include: the waterproof connector, by the mutual retraction of the various abutments, pushes the various petals to retract inward, thereby achieving clamping and fixing of the cable; by the mutual separation of the various abutments, the various abutments can be separated from the corresponding petals, releasing the fixation of the various petals, avoiding the use of traditional threaded connection methods to achieve cable fixation, thereby avoiding the problem of difficulty or inability to remove the cable when the internal and external threads are corroded and damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a three-dimensional structural diagram of a waterproof connector for an ultrasonic level meter provided by the utility model;

[0018] Figure 2 yes Figure 1 A cross-sectional view of a waterproof connector for an ultrasonic level gauge;

[0019] Figure 3 yes Figure 1 Schematic diagram of the three-dimensional structure of the drive ring;

[0020] Figure 4 This is a structural diagram of a liquid level measuring device provided by the utility model;

[0021] In the figure: 100 - joint body, 110 - connecting pipe, 111 - first section, 112 - second section, 120 - flap, 121 - clamping channel, 130 - push-in pipe, 140 - push-ring, 150 - spacer ring, 160 - sealing ring, 200 - driving mechanism, 210 - push-moving member, 220 - driving assembly, 221 - driving ring, 2211 - guide groove, 2212 - first locking hole, 222 - guide column, 223 - elastic member, 230 - mounting pipe, 231 - guide hole, 232 - pipe body, 233 - snap ring, 2331 - snap groove, 2332 - second locking hole, 300 - bracket, 310 - bracket, 311 - first mounting port, 320 - pad, 321 - second mounting port, 400 - ultrasonic level meter body, 410 - housing, 420 - fixing pipe. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0023] The utility model provides a waterproof connector for ultrasonic level gauge, the structure of which is as follows: Figure 1 - Figure 3 As shown, it includes a joint body 100 and a driving mechanism 200, the joint body 100 includes a connecting tube 110 and a plurality of petals 120, each of the petals 120 is arranged in an annular direction and is connected to one end of the connecting tube 110, each of the petals 120 encloses a clamping channel 121 coaxial with the connecting tube 110, and the petals 120 have a deformable structure; the driving mechanism 200 includes a plurality of abutments 210 and a driving assembly 220, each of the abutments 210 is respectively arranged on the outside of the corresponding petal 120, and the driving assembly 220 is connected to each of the abutments 210, and is used to drive each of the abutments 210 to retract or separate from each other, so that each of the abutments 210 pushes the corresponding petal 120 to retract inward.

[0024] When in use, the other end of the connecting tube 110 is detachably connected to the opening on the shell of the ultrasonic level meter, and the cable is passed through the clamping channel 121, the connecting tube 110 and the opening on the shell in turn to fix the end of the cable to the shell. By manipulating the driving component 220, the driving component 220 drives each of the abutting members 210 to retract with each other, and each of the abutting members 210 can push the corresponding petals 120 to retract inward. During the process of retracting each of the petals 120 inward, the cable can be clamped to fix the cable. When the ultrasonic level meter fails and needs to be repaired, the driving component 220 can be manipulated to drive each of the abutting members 210 to separate from each other. So that each of the abutments 210 can be separated from the corresponding flap 120, the end of the cable can be removed from the housing, and then the cable can be pulled out from the opening on the housing, the connecting tube 110 and the clamping channel 121 in turn. The waterproof connector pushes each of the flaps 120 inward by the mutual retraction of each of the abutments 210, thereby achieving clamping and fixing of the cable. By separating each of the abutments 210, each of the abutments 210 can be separated from the corresponding flap 120, releasing the fixation of each flap 120, avoiding the use of traditional threaded connection to fix the cable, thereby avoiding the problem of difficulty or inability to remove the cable when the internal and external threads are corroded and damaged.

[0025] As a preferred embodiment, please refer to Figure 1 and Figure 2 The connector body 100 also includes an insertion tube 130 and a push-ring 140. The insertion tube 130 is used to seal and slide into the connecting tube 110 along one end of the connecting tube 110. The push-ring 140 is coaxially fixed to one end of the insertion tube 130 and is used to tighten the end face of one end of the connecting tube 110. One end of each of the petals 120 is fixed to the push-ring 140. Each of the petals 120 can be clamped with the connecting tube 110 through the insertion tube 130 and the push-ring 140. The other end of the connecting tube 110 is detachably connected to the opening on the housing of the ultrasonic liquid level meter, and the cable is passed through the clamping channel 121, the insertion tube 130, the connecting tube 110 and the opening on the housing in sequence.

[0026] As a preferred embodiment, please refer to Figure 1 and Figure 2The driving mechanism 200 also includes a mounting tube 230, which is sleeved on the connecting tube 110, the retaining ring 140 and each of the petals 120, and is detachably fixed to the connecting tube 110. A plurality of guide holes 231 are circumferentially opened on the mounting tube 230, all of which extend radially along the mounting tube 230. Each of the guide holes 231 corresponds one-to-one to each of the petals 120, and each of the retaining members 210 slides through the corresponding guide holes 231. The mounting tube 230 can provide support and guidance for each of the retaining members 210, and can also improve the sealing performance of the waterproof joint.

[0027] As a preferred embodiment, please refer to Figure 1 and Figure 2 The abutment 210 is a rod-shaped structure, which facilitates the cooperation and connection between the abutment 210 and the guide hole 231 to push the petal 120 inward. The inner end of the abutment 210 is an arc-shaped structure, which can prevent the inner end of the abutment 210 from damaging the petal 120.

[0028] As a preferred embodiment, please refer to Figure 2 and Figure 3The driving assembly 220 includes a driving ring 221, a plurality of guide posts 222 and a plurality of elastic members 223. The driving ring 221 is rotatably sleeved on the mounting tube 230. A plurality of guide grooves 2211 are circumferentially opened on the driving ring 221. Each of the guide grooves 2211 is radial and has an arc-shaped structure. Each of the guide posts 222 is arranged along the axial direction of the mounting tube 230. One end of each of the guide posts 222 is slidably arranged in the corresponding guide groove 2211. The other end of each of the guide posts 222 is fixed to the outer end of the corresponding abutting member 210. Each of the elastic members 223 is sleeved on the corresponding abutting member 210. On the moving member 210, the two ends of the elastic member 223 are respectively fixed to the outer ends of the mounting tube 230 and the abutting member 210, and are used to drive the inner end of the abutting member 210 to move into the mounting tube 230, so that the inner end of each abutting member 210 pushes the other end of the corresponding petal 120 to retract inward, and the other end of each petal 120 clamps the cable, and the driving ring 221 is rotated in the reverse direction. Since the whole formed by the abutting member 210 and the guide column 222 is restricted by the guide hole 231 and the guide groove 2211, when the driving ring 221 rotates in the reverse direction, the abutting members 210 will separate from each other. And retract into the guide hole 231. At this time, each of the elastic members 223 is in a stretched state and accumulates tensile elastic potential energy. Then, the mounting tube 230 is sleeved on the connecting tube 110, the push ring 140 and each of the petals 120, and the mounting tube 230 and the connecting tube 110 are detachably fixed. The cable is passed through the clamping channel 121, the push-in tube 130, the connecting tube 110 and the opening on the shell in sequence, and the end of the cable is fixed to the shell. The driving ring 221 is loosened, and each of the elastic members 223 releases the tensile elastic potential energy, pushing the inner end of the corresponding push-in member 210 into the mounting tube 23 again. 0, at this time, the inner end of each of the abutting members 210 pushes the other end of the corresponding flap 120 inward, and makes the other end of each of the flaps 120 clamp the cable. When the ultrasonic level meter fails and needs to be repaired, the drive ring 221 is rotated in the opposite direction again, and each of the abutting members 210 will separate from each other and retract into the guide hole 231 again. Each of the abutting members 210 is separated from the corresponding flap 120, and the fixation of the flap 120 is released. The end of the cable is removed from the outer shell, and the cable is then pulled out from the opening on the outer shell, the connecting tube 110, the abutting tube 130 and the clamping channel 121 in turn.

[0029] As a preferred embodiment, please refer to Figure 2The mounting tube 230 includes a tube body 232 and two snap rings 233. The two snap rings 233 are fixedly mounted on the tube body 232. A slot 2331 is formed between the two snap rings 233. The drive ring 221 is rotatably mounted within the slot 2331. The drive ring 221 can rotate relative to the tube body 232 within the slot 2331. The slot 2331 limits the axial position of the drive ring 221, preventing the drive ring 221 from axially moving relative to the tube body 232. One end of the tube body 232 is a flange structure that is detachably fixed to the flange on the connecting tube 110.

[0030] As a preferred embodiment, the elastic member 223 is a spring, which can accumulate tensile elastic potential energy when subjected to a tensile force, and release the tensile elastic potential energy when the tensile force disappears.

[0031] As a preferred embodiment, please refer to Figure 2 and Figure 3 The drive assembly 220 also includes a locking piece, a first locking hole 2212 is provided on the drive ring 221, and second locking holes 2332 corresponding to each other are provided on the two snap rings 233. When the inner ends of each of the abutting pieces 210 are moved into the guide holes 231, the first locking hole 2212 is connected with the two second locking holes 2332, and the locking piece is inserted into the first locking hole 2212 and the two second locking holes 2332 to lock the position of the drive ring 221. At this time, the inner ends of each of the abutting pieces 210 are separated from the corresponding petals 120, and the fixation of the petals 120 is released, so that the cable in the clamping channel can be pulled out, avoiding the problem of people having to apply force to the drive ring 221 all the time when installing or removing the cable.

[0032] As a preferred embodiment, the locking member is a rod-shaped structure, which is convenient for insertion into the first locking hole 2212 and the two second locking holes 2332 .

[0033] As a preferred embodiment, please refer to Figure 1 and Figure 2 The joint body 100 also includes a spacer ring 150 and a sealing ring 160. The spacer ring 150 is fixedly sleeved on the connecting pipe 110 to separate the first section 111 and the second section 112 on the connecting pipe 110. The mounting tube 230 is sleeved on the first section 111. The outer wall of the second section 112 is provided with an external thread. The sealing ring 160 is sleeved on the second section 112. When the second section 112 is detachably docked with the opening on the housing of the ultrasonic liquid level meter, the sealing ring 160 is squeezed by the housing and the spacer ring 150 and deformed, thereby playing a sealing role.

[0034] Please refer to Figure 1 - Figure 4 Based on the above-mentioned waterproof connector for ultrasonic liquid level meter, the present invention also provides a liquid level measuring device, including a bracket 300, an ultrasonic liquid level meter body 400 and the above-mentioned waterproof connector for ultrasonic liquid level meter, the ultrasonic liquid level meter body 400 includes a shell 410, a fixing tube 420 and a measuring component, the shell 410 is detachably fixed on the bracket 300, the shell 410 has a cavity, one end of the fixing tube 420 is connected to the cavity, the other end of the connecting tube 110 is used to be detachably connected to the other end of the fixing tube 420, the measuring component is arranged in the cavity, and the ultrasonic liquid level meter body 400 can be supported by the bracket 300.

[0035] As a preferred embodiment, please refer to Figure 2 and Figure 4 The fixing tube 420 is provided with an internal thread, the second section 112 extends into the fixing tube 420 and is screwed with the internal thread via the external thread, so that the installation of the connecting tube 110 and the fixing tube 420 is convenient.

[0036] As a preferred embodiment, please refer to Figure 4 The bracket 300 includes a frame 310 and a pad 320. The frame 310 is an L-shaped structure. The vertical plate of the frame 310 is fixed to the pool wall. The horizontal plate of the frame 310 is provided with a first mounting port 311. The pad 320 has an elastic structure. The pad 320 is provided with a second mounting port 321. The pad 320 is detachably fixed to the horizontal plate of the frame 310, and the second mounting port 321 is connected to the first mounting port 311. The bottom of the shell 410 has a protrusion, which is placed in the second mounting port 321 and the first mounting port 311. The bottom surface of the shell 410 abuts against the surface of the pad 320. The pad 320 can protect the shell 410 to prevent the shell 410 from being scratched by the frame 310.

[0037] In order to better understand the present invention, the following Figure 1 - Figure 4 The working principle of the technical solution of the utility model is described in detail:

[0038] When in use, the second section 112 of the connecting tube 110 is extended into the fixed tube 420, the connecting tube 110 and the fixed tube 420 are detachably docked, and the driving ring 221 is rotated in the opposite direction. Since the whole formed by the abutting member 210 and the guide column 222 is restricted by the guide hole 231 and the guide groove 2211, when the driving ring 221 rotates in the opposite direction, each of the abutting members 210 will separate from each other and retract into the guide hole 231. At this time, each of the elastic members 223 is in a stretched state and accumulates stretching elastic potential energy. Since the inner ends of each of the abutting members 210 move into the guide hole 231, the first lock The tightening hole 2212 is communicated with the two second locking holes 2332. The locking piece is inserted into the first locking hole 2212 and the two second locking holes 2332 to lock the position of the drive ring 221. Then, the mounting tube 230 is sleeved on the connecting tube 110, the push ring 140 and each of the petals 120, and the mounting tube 230 is detachably fixed to the connecting tube 110. The cable is passed through the clamping channel 121, the push-in tube 130, the connecting tube 110 and the fixing tube 420 in sequence. The end of the cable enters the cavity, and the end of the cable is fixed to the housing 410. The locking piece is removed from the first locking hole 2 212 and the two second locking holes 2332 are pulled out, each of the elastic members 223 releases the tensile elastic potential energy, and pushes the inner end of the corresponding abutment member 210 into the mounting tube 230 again. At this time, the inner end of each abutment member 210 pushes the other end of the corresponding flap 120 inward, and makes the other end of each flap 120 clamp the cable. When the ultrasonic level meter fails and needs to be repaired, the drive ring 221 is rotated in the opposite direction again, and each of the abutment members 210 will separate from each other and retract into the guide hole 231 again. Each of the abutment members 210 is separated from the corresponding flap 120, and the fixation of the flap 120 is released. The end of the cable is removed from the housing, and the cable is then pulled out from the opening on the housing, the connecting tube 110, the push-in tube 130 and the clamping channel 121 in turn. The waterproof connector pushes the petals 120 inward by the mutual retraction of the respective abutments 210, thereby clamping and fixing the cable. The mutual separation of the respective abutments 210 can separate the respective abutments 210 from the corresponding petals 120, thereby releasing the fixation of the respective petals 120, avoiding the use of traditional threaded connections to fix the cable, thereby avoiding the problem of difficulty or inability to remove the cable when the internal and external threads are corroded and damaged.

[0039] The utility model provides a waterproof connector for an ultrasonic liquid level meter and a liquid level measuring device, which has the following beneficial effects:

[0040] (1) The bottom surface of the shell 410 abuts against the surface of the pad 320 , and the pad 320 can protect the shell 410 and prevent the shell 410 from being scratched by the frame 310 ;

[0041] (2) When the inner ends of the respective abutting members 210 are moved into the guide holes 231, the first locking hole 2212 is connected to the two second locking holes 2332. The locking member is inserted into the first locking hole 2212 and the two second locking holes 2332 to lock the position of the driving ring 221, thereby avoiding the problem of a person having to constantly apply force to the driving ring 221 when installing or removing the cable.

[0042] (3) The waterproof connector can clamp and fix the cable by retracting the abutting members 210 to each other, pushing the flaps 120 inward, and separating the abutting members 210 from each other, so that the abutting members 210 can be separated from the corresponding flaps 120, thereby releasing the fixation of the flaps 120 and avoiding the use of traditional threaded connection to fix the cable, thereby avoiding the problem of difficulty or inability to remove the cable due to damage caused by corrosion of the internal and external threads.

[0043] The specific embodiments of the present invention described above do not limit the scope of protection of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A waterproof connector for an ultrasonic level gauge, characterized in that: include: The connector body includes a connecting tube and a plurality of petals, each of which is circumferentially arranged and connected to one end of the connecting tube. Each of the petals encloses a clamping channel coaxial with the connecting tube, and each petal has a deformable structure. The driving mechanism includes a plurality of abutments and a driving assembly, wherein each abutment is respectively arranged on the outer side of the corresponding petal, and the driving assembly is connected to each abutment and is used to drive each abutment to retract or separate from each other, so that each abutment pushes the corresponding petal inward to retract.

2. The waterproof joint for ultrasonic level gauge according to claim 1, characterized in that: The joint body also includes an insertion tube and a retaining ring. The insertion tube is used to seal and slide into the connecting tube along one end of the connecting tube. The retaining ring is coaxially fixed to one end of the insertion tube and is used to tighten the end face of one end of the connecting tube. One end of each of the petals is fixed to the retaining ring.

3. The waterproof joint for ultrasonic level gauge according to claim 2, characterized in that: The driving mechanism also includes a mounting tube, which is sleeved on the connecting tube, the retaining ring and each of the petals, and is detachably fixed to the connecting tube. A plurality of guide holes are circumferentially opened on the mounting tube, all of which extend radially along the mounting tube. Each of the guide holes corresponds one-to-one to each of the petals, and each of the retaining members slides through the corresponding guide hole.

4. The waterproof joint for ultrasonic level gauge according to claim 3, characterized in that: The abutting piece is a rod-shaped structure.

5. The waterproof joint for ultrasonic level gauge according to claim 3, characterized in that: The driving assembly includes a driving ring, a plurality of guide posts and a plurality of elastic members, the driving ring being rotatably sleeved on the mounting tube, and a plurality of guide grooves are circumferentially opened on the driving ring, each of the guide grooves is radial and has an arc-shaped structure, and each of the guide posts is arranged along the axial direction of the mounting tube, and one end of each guide post is slidably arranged in the corresponding guide groove, and the other end of each guide post is fixedly connected to the outer end of the corresponding abutment, and each of the elastic members is sleeved on the corresponding abutment, and the two ends of the elastic member are respectively fixedly connected to the outer ends of the mounting tube and the abutment, for driving the inner end of the abutment to move into the mounting tube, so that the inner end of each abutment pushes the other end of the corresponding petal to retract inward, and the other end of each petal clamps the cable.

6. The waterproof joint for ultrasonic level gauge according to claim 5, characterized in that: The mounting tube comprises a tube body and two clamping rings. The two clamping rings are fixedly sleeved on the tube body. A clamping groove is formed between the two clamping rings. The driving ring is rotatably clamped in the clamping groove.

7. The waterproof joint for ultrasonic level gauge according to claim 5, characterized in that: The elastic member is a spring.

8. The waterproof joint for ultrasonic level gauge according to claim 6, characterized in that: The drive assembly also includes a locking piece, a first locking hole is provided on the drive ring, and second locking holes corresponding to each other are provided on the two retaining rings. When the inner ends of each of the abutting pieces are moved into the guide holes, the first locking hole is connected with the two second locking holes, and the locking piece is inserted into the first locking hole and the two second locking holes.

9. A liquid level measuring device, characterized in that: It includes a bracket, an ultrasonic liquid level meter body and a waterproof joint for an ultrasonic liquid level meter as described in any one of claims 1 to 8, the ultrasonic liquid level meter body includes a shell, a fixing tube and a measuring component, the shell is detachably fixed on the bracket, the shell has a cavity, one end of the fixing tube is connected to the cavity, the other end of the connecting tube is used to be detachably connected to the other end of the fixing tube, and the measuring component is arranged in the cavity.

10. The liquid level measuring device according to claim 9, characterized in that: The bracket includes a frame and a pad. The frame is an L-shaped structure. The vertical plate of the frame is fixedly connected to the pool wall. A first mounting port is provided on the horizontal plate of the frame. The pad has an elastic structure. A second mounting port is provided on the pad. The pad is detachably fixed to the horizontal plate of the frame, and the second mounting port is connected to the first mounting port. The bottom of the shell has a protrusion, which is placed in the second mounting port and the first mounting port. The bottom surface of the shell abuts against the surface of the pad.

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