A retractable structure of a drop-in liquid level transmitter

Abstract

This invention relates to a take-up and release structure for an immersion-type liquid level transmitter, including a liquid level display instrument connected to a sensor via a cable. The liquid level display instrument is mounted on a flange, and a housing is installed at the lower end of the flange. A traction cleaning module is located at the lower middle part of the housing, a first take-up and release module is installed at the rear end of the housing, and a second take-up and release module is temporarily embedded at the front end of the housing. A take-up and release roller module is snapped between the first and second take-up and release modules. The cable is serpentinely wound between the take-up and release roller modules. A pull module on the housing and the traction cleaning module are connected with a variable speed engagement. A docking assembly is installed at the lower end of the second take-up and release module. This invention can solve the problems of laborious winding, liquid medium adhering to the cable surface, potential hand damage from direct contact with the liquid medium, and cable tangling after winding.

Description

Technical Field

[0001] This invention relates to the technical field of level transmitters, and in particular to a retractable structure for an immersion-type level transmitter. Background Technology

[0002] Submersible level sensors are pressure sensors that measure liquid levels. Based on the principle that the static pressure of a liquid is proportional to its height, they employ isolated diffused silicon sensing elements or ceramic capacitive pressure sensors to convert static pressure into an electrical signal. After temperature compensation and linear correction, this signal is converted into a standard electrical signal. They are generally suitable for measuring the level of various media in systems and industries such as petrochemicals, metallurgy, power, pharmaceuticals, water supply and drainage, and environmental protection. Submersible level transmitters can convert changes in various level parameters into standard current signals, which are then transmitted to the control room for centralized display, alarm, or automatic control by secondary instruments or computers. Their excellent structure and installation methods make them suitable for continuous detection of liquid, material, or particle levels under special conditions such as high temperature, high pressure, strong corrosion, easy crystallization, anti-clogging, anti-cold condensation, and solid powder or granular materials. They can be widely used in detection and control in various industrial processes.

[0003] In the use of submersible level transmitters, the sensor needs to be brought into deep contact with the liquid being measured by the downward delivery of the cable. The traditional method of cable winding is to manually coil the cable together. However, this is laborious and the liquid medium on the cable surface can cause hand injuries due to direct contact with the liquid medium. Furthermore, the cable is prone to knotting after winding, which requires untying before it can be used normally, resulting in a long winding and unwinding time. In addition, the existing cables are usually exposed to the air when not in use, and dust accumulates on the cable surface over time.

[0004] Therefore, there is an urgent need for a submersible level transmitter take-up and take-down structure to solve the above-mentioned defects. Summary of the Invention

[0005] I. Technical Solution

[0006] To achieve the above objectives, the present invention provides the following technical solution: a submersible level transmitter retraction structure, including a level display instrument, which is connected to a sensor via a cable and is mounted on a flange.

[0007] A storage shell is installed at the lower end of the flange. A traction cleaning module is set at the lower middle part of the storage shell. A first take-up and release module is installed at the rear end of the storage shell. A second take-up and release module is temporarily embedded at the front end of the storage shell. A take-up and release roller module is snapped between the first and second take-up and release modules. A cable is serpentinely wound between the take-up and release roller modules. The pulling module set on the storage shell is connected to the traction cleaning module with a variable speed. A docking component is installed at the lower end of the second take-up and release module.

[0008] The first and second retractable modules have the same structure and size. The first retractable module includes an embedded plate, a movable component, and a return spring. The embedded plate is embedded in the rear end of the storage shell. The left and right ends of the embedded plate are symmetrically provided with movable slots. The movable component, which is slidably connected to the movable slot, is connected to the movable slot with a return spring that can be reset. The return spring always maintains a tendency to push the movable component outward. The traction cleaning module retracts and extends the cable by pulling the movable component.

[0009] As a preferred embodiment of the present invention, the traction cleaning module includes a traction component, a motor, a deflector frame, and a cleaning ring. The traction component is rotatably mounted on the storage shell and is arranged symmetrically on the left and right sides. The traction component arranged on the left side is connected to the motor mounted on the storage shell. The deflector frame, corresponding to the position of the traction component, is mounted on the inner wall of the storage shell. An embedding groove is provided at the lower end of the storage shell, and a semi-circular cleaning ring is installed at the rear end of the embedding groove.

[0010] As a preferred embodiment of the present invention, the traction assembly includes a rotating shaft, a first gear, and a traction roller. The rotating shaft is rotatably mounted on the housing, the first gear is installed at the rear end of the rotating shaft, and the traction roller is sleeved on the rotating shaft. The surface of the traction roller is structurally matched with the cable. The first gears arranged on the left and right mesh with each other, and the rotating shaft located on the left side is connected to the output shaft of the motor.

[0011] As a preferred embodiment of the present invention, the movable component includes a movable block and square holes. The movable block is slidably disposed on the movable groove. Square holes are evenly opened from top to bottom on one end face of the movable block near the take-up and take-down roller module, and a reset spring is connected between the movable block and the movable groove.

[0012] As a preferred embodiment of the present invention, the take-up and release roller module includes an insertion block, a cylinder and a rotating roller. The cylinder is connected between the insertion blocks, and the rotating roller is rotatably mounted on the cylinder. The rotating roller can rotate on the cylinder to ensure that the cable is not subjected to too much resistance during transmission. The insertion block is inserted into the inside of the square hole.

[0013] As a preferred embodiment of the present invention, the pulling module includes a second gear, a take-up reel, a pulling rope, and a reversing assembly. The second gear, which meshes with the first gear, is rotatably mounted on the housing. The rear end of the second gear is equipped with a take-up reel, which is used to wind up the pulling rope. The take-up reel is connected to one end of the pulling rope, and the other end of the pulling rope passes through the reversing assembly and is connected to a movable component on the first take-up and release module. The reversing assembly is rotatably mounted on an embedded plate on the first take-up and release module, and the reversing assembly plays a role in reversing the direction of the pulling rope.

[0014] As a preferred embodiment of the present invention, the second gear and the take-up reel are arranged coaxially. The diameter of the second gear is larger than that of the first gear. The meshing and rotation of the two gears generates a speed difference, and the speed of the first gear is greater than that of the second gear. The speed difference is set to ensure that the length of the cable pulled by the traction roller is equal to the sum of the moving distances of all the moving blocks in the first take-up and unwinding module.

[0015] As a preferred embodiment of the present invention, the docking assembly includes a connecting rod, a docking rod, a second deflector frame, and a docking ring. The connecting rod is installed at the lower end of the second retractable module, the lower end of the connecting rod is equipped with the docking rod, the rear end of the docking rod is provided with the docking ring, and the second deflector frame is installed in the middle of the connecting rod.

[0016] As a preferred technical solution of the present invention, the first and second directional control frames are combined to form a complete first ring. The first and second directional control frames are semi-circular structures to facilitate the disassembly and connection between the second retraction module and the storage shell, and also to ensure that the cable can enter or exit between the first and second directional control frames (the same applies to the cleaning ring and the docking ring). The cleaning ring and the docking ring are combined to form a complete second ring, and the first and second rings are arranged coaxially. The inner walls of the cleaning ring and the docking ring are covered with a removable cleaning layer, which is easy to replace.

[0017] As a preferred embodiment of the present invention, a dustproof shell is installed on the back of the storage shell, and the traction cleaning module and the pulling module are located inside the dustproof shell, which serves to prevent dust.

[0018] II. Beneficial Effects

[0019] 1. The present invention discloses a submersible level transmitter take-up and release structure. The traction cleaning module, pulling module, first take-up and release module, and second take-up and release module of this application adopt a structural linkage design concept. When the cable is transported, the position of the moving components is controlled by the speed difference, so that the moving components arranged on the left and right move towards each other or gradually separate. Then, the take-up and release roller module controls the length of the cable in the storage shell. When the take-up and release roller module gradually moves closer, the cable length in the storage shell gradually decreases, so that the cable extending from the bottom of the storage shell gradually increases. At this time, the rotation of the traction roller drives the cable to be transported downward. The present application avoids the cable from getting tangled in the storage shell by means of a serpentine winding method (the take-up and release roller modules are arranged alternately on the left and right). In addition, the shell of the storage shell avoids direct contact between the cable and the outside after it is stored, reducing the possibility of dust accumulation.

[0020] 2. The submersible level transmitter winding and unwinding structure of the present invention combines a cleaning ring and a docking ring to clean the surface of the incoming and outgoing cables. On the basis of dust prevention in the housing, an annular cleaning function is added to further ensure the cleanliness of the cable surface during unwinding and winding. Moreover, no direct contact with personnel is required during winding, avoiding injury to personnel's hands. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Figure 1 This is a schematic diagram of the structure of the present invention;

[0023] Figure 2 This is an overall sectional view of the present invention;

[0024] Figure 3 This is a schematic diagram of the first structure of the present invention, including the storage shell, the traction cleaning module, the first take-up and release module, the second take-up and release module, the take-up and release roller module, the pulling module, and the docking assembly.

[0025] Figure 4 This is a second structural diagram of the present invention, which includes the storage shell, traction cleaning module, first take-up and release module, second take-up and release module, take-up and release roller module, pulling module, and docking assembly.

[0026] Figure 5 This is a cross-sectional view of the take-up and release roller module of the present invention. Detailed Implementation

[0027] Embodiments of the present invention will now be described with reference to the accompanying drawings. In this process, to ensure clarity and convenience, we may exaggerate the width of lines or the size of constituent elements in the drawings.

[0028] Furthermore, the terms used below are defined based on the functionality of this invention and may vary depending on the user's, operator's, or conventions. Therefore, these terms are defined based on the entire contents of this specification.

[0029] like Figures 1 to 5 As shown, a submersible level transmitter retraction structure includes a level display 1, which is connected to a sensor 3 via a cable 2, and is mounted on a flange 4.

[0030] A storage shell 5 is installed at the lower end of the flange 4. A traction cleaning module 6 is provided at the lower middle part of the storage shell 5. A first take-up and release module 7 is installed at the rear end of the storage shell 5. A second take-up and release module 8 is temporarily embedded at the front end of the storage shell 5. A take-up and release roller module 9 is snapped between the first take-up and release module 7 and the second take-up and release module 8. The cable 2 is serpentinely wound between the take-up and release roller modules 9. The pulling module 10 set on the storage shell 5 is connected to the traction cleaning module 6 with a variable speed. A docking component 11 is installed at the lower end of the second take-up and release module 8.

[0031] The first retractable module 7 and the second retractable module 8 have the same structure and size. The first retractable module 7 includes an embedded plate 71, a movable component 72, and a return spring 73. The embedded plate 71 is embedded in the rear end of the storage shell 5. The left and right ends of the embedded plate 71 are symmetrically provided with movable slots. The movable component 72, which is slidably connected to the movable slot, is connected to the movable slot with a return spring 73 that can be reset. The return spring 73 always maintains a tendency to push the movable component 72 outward. The traction cleaning module 6 retracts and extends the cable 2 by pulling the movable component 72.

[0032] Specifically, flange 4 is installed at the upper opening of the tank. The traction cleaning module 6 pulls the cable 2 downwards. At the same time, the traction cleaning module 6, the pulling module 10, the first take-up module 7, and the second take-up module 8 cooperate to bring the movable components 72 in the first take-up module 7 and the second take-up module 8 closer together. The take-up roller module 9 also moves closer together. By bringing the take-up roller module 9 closer together, the length of the cable 2 stored in the storage shell 5 is shortened, causing the protruding part of the cable 2 located below the storage shell 5 to gradually lengthen. The sensor 3 gradually descends and penetrates into the liquid being measured until it reaches the bottom of the tank. Then, the liquid level in the tank is observed by the liquid level display 1. Through the structural linkage between the traction cleaning module 6, the pulling module 10, the first take-up and release module 7, and the second take-up and release module 8, the position of the movable component 72 is controlled by the speed difference when the cable 2 is being transported. This causes the movable components 72 arranged on the left and right to move closer together or gradually separate. Then, the take-up and release roller module 9 controls the length of the cable 2 stored in the storage shell 5, thus controlling the take-up and release.

[0033] In another embodiment of the present invention, the traction cleaning module 6 further includes a traction component 61, a motor 62, a deflector frame 63, and a cleaning ring 64. The traction component 61 is rotatably mounted on the storage shell 5, and the traction component 61 is arranged symmetrically on the left and right. The traction component 61 arranged on the left side is connected to the motor 62 mounted on the storage shell 5. The deflector frame 63, which corresponds to the position of the traction component 61, is mounted on the inner wall of the storage shell 5. An embedding groove is provided at the lower end of the storage shell 5, and a semi-circular cleaning ring 64 is installed at the rear end of the embedding groove.

[0034] Furthermore, the traction assembly 61 includes a rotating shaft 611, a gear 612, and a traction roller 613. The rotating shaft 611 is rotatably mounted on the housing 5. The gear 612 is installed at the rear end of the rotating shaft 611. The traction roller 613 is sleeved on the rotating shaft 611. The surface of the traction roller 613 is structurally matched with the cable 2. The gears 612 arranged on the left and right mesh with each other. The rotating shaft 611 located on the left side is connected to the output shaft of the motor 62.

[0035] Specifically, during assembly, the second take-up and release module 8 is opened, and then the cable 2 is embedded and serpentinely wound onto the take-up and release roller module 9. The second take-up and release module 8 is then embedded into the front end of the storage shell 5, thus forming a complete shell. During transport, the motor 62 drives the left rotating shaft 611 and traction roller 613 to rotate clockwise. Under the meshing of the gears 612 arranged on the left and right, the right rotating shaft 611 and traction roller 613 are driven to rotate counterclockwise. The traction roller 613 drives the cable 2 to be transported downwards (when the cable 2 needs to be lifted, simply control the motor 62 to drive the left rotating shaft 611 and traction roller 613 to rotate counterclockwise).

[0036] Furthermore, the movable component 72 includes a movable block 721 and a square hole 722. The movable block 721 is slidably disposed on the movable groove. The movable block 721 has square holes 722 evenly distributed from top to bottom on one end face of the movable block 721 near the take-up and release roller module 9. A return spring 73 is connected between the movable block 721 and the movable groove.

[0037] Furthermore, the take-up and release roller module 9 includes an insertion block 91, a cylinder 92, and a rotating roller 93. The cylinder 92 is connected between the insertion blocks 91, and the rotating roller 93 is rotatably mounted on the cylinder 92. The rotating roller 93 can rotate on the cylinder 92, ensuring that the cable 2 will not be subjected to too much resistance during transmission. The insertion block 91 is inserted into the inside of the square hole 722.

[0038] Specifically, the insertion block 91 is selectively inserted into the square hole 722 at a suitable height, so that the left and right take-up and take-down roller modules 9 are arranged in an alternating manner, ensuring that the cable 2 in the storage shell 5 is conveyed in a serpentine manner.

[0039] Furthermore, the pulling module 10 includes a second gear 101, a take-up reel 102, a pulling rope 103, and a reversing assembly 104. The second gear 101, which meshes with the first gear 612, is rotatably mounted on the storage shell 5. The take-up reel 102 is installed at the rear end of the second gear 101. The take-up reel 102 is used to wind up the pulling rope 103. One end of the take-up reel 102 is connected to the pulling rope 103. The other end of the pulling rope 103 passes through the reversing assembly 104 and is connected to the movable component 72 on the first take-up and release module 7. The 104 is rotatably mounted on the embedded plate 71 on the first take-up module 7. The reversing component 104 plays the role of reversing the conveying of the pull rope 103. The gear 2 101 and the take-up reel 102 are arranged coaxially. The diameter of the gear 2 101 is larger than that of the gear 1 612. The two mesh and rotate to generate a speed difference. The speed of the gear 1 612 is greater than that of the gear 2 101. The speed difference is set to ensure that the length of the cable 2 pulled by the traction roller 613 is equal to the sum of the moving distances of all the moving blocks 721 in the first take-up module 7.

[0040] Specifically, the rotating gear 612 meshes with the gear 101, thereby driving the gear 101 to rotate at a reduced speed. The coaxially arranged take-up reel 102 winds around one end of the pull rope 103, and the shortened pull rope 103 drives the movable block 721 in the first take-up and unwinding module 7 to move inward.

[0041] Furthermore, the docking assembly 11 includes a connecting rod 111, a docking rod 112, a second deflector 113, and a docking ring 114. The connecting rod 111 is installed at the lower end of the second take-up and take-down module 8. The docking rod 112 is installed at the lower end of the connecting rod 111. The docking ring 114 is provided at the rear end of the docking rod 112. The second deflector 113 is installed in the middle of the connecting rod 111.

[0042] Furthermore, the first directional frame 63 and the second directional frame 113 are combined to form a complete first ring. The first directional frame 63 and the second directional frame 113 have a semi-circular structure, which is to facilitate the disassembly and connection between the second retractable module 8 and the storage shell 5. It is also to ensure that the cable 2 can enter or exit between the first directional frame 63 and the second directional frame 113 (the same applies to the cleaning ring 64 and the docking ring 114). The cleaning ring 64 and the docking ring 114 are combined to form a complete second ring. The first ring and the second ring are arranged coaxially. The inner walls of the cleaning ring 64 and the docking ring 114 are covered with a removable cleaning layer, which is easy to replace.

[0043] Specifically, when the embedded plate 71 in the second take-up module 8 is embedded in the front end of the housing 5 to form a complete housing, the first deflector 63 and the second deflector 113 are merged, and the cleaning ring 64 and the docking ring 114 are merged. The merged first ring plays the role of deflecting and guiding the cable 2, and the cleaning layer in the merged second ring plays the role of cleaning the output or input cable 2.

[0044] Furthermore, a dustproof shell 12 is installed on the back of the storage shell 5, and the traction cleaning module 6 and the pulling module 10 are located inside the dustproof shell 12, which serves to prevent dust.

[0045] Work process:

[0046] Step 1, Assembly: Separate the embedded plate 71 in the second take-up and release module 8 from the storage shell 5, put the cable 2 into the storage shell 5, and serpentinely wrap it around the take-up and release roller module 9. Then, re-embed the embedded plate 71 in the second take-up and release module 8 into the front end of the storage shell 5 to form a complete shell (at this time, the lower end of the cable 2 passes through the first ring and the second ring in sequence).

[0047] Step 2, Installation: Install flange 4 at the upper opening of the tank body;

[0048] Step 3, Conveying: The cable 2 is pulled downward by the rotating traction roller 613, and the position of the sensor 3 gradually descends and penetrates into the liquid being measured until it reaches the bottom of the tank (at the same time, the traction cleaning module 6, the pulling module 10, the first take-up and release module 7, and the second take-up and release module 8 cooperate to control the position of the take-up and release roller module 9, thereby adjusting the length of the cable 2 stored in the storage shell 5).

[0049] Step 4: Observation: Observe the changes in the liquid level inside the tank using the liquid level display instrument 1.

[0050] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A kind of drop-in liquid level transmitter retraction structure, including liquid level display instrument (1), liquid level display instrument (1) is connected with sensor (3) by cable (2), liquid level display instrument (1) is installed on flange (4), it is characterized in that: The lower end of the flange (4) is provided with a receiving shell (5), the middle lower end of the receiving shell (5) is provided with a traction cleaning module (6), the rear end of the receiving shell (5) is provided with a first retraction module (7), the front end of the receiving shell (5) is temporarily embedded with a second retraction module (8), the first retraction module (7) and the second retraction module (8) are clamped with a retraction roller module (9) between them, the cable (2) is serpentine wound between the retraction roller module (9), the pulling module (10) provided on the receiving shell (5) is connected between the traction cleaning module (6) at variable speed, the lower end of the second retraction module (8) is provided with a docking assembly (11); The traction cleaning module (6) includes a traction assembly (61), a motor (62), a direction-changing frame (63) and a cleaning ring (64), the traction assembly (61) is rotatably arranged on the receiving shell (5), and the traction assembly (61) is arranged symmetrically left and right, the traction assembly (61) arranged on the left side is connected with the motor (62) installed on the receiving shell (5), the direction-changing frame (63) corresponding to the position of the traction assembly (61) is installed on the inner wall of the receiving shell (5), the lower end of the receiving shell (5) is provided with an embedded groove, and the rear end of the embedded groove is provided with a semicircular cleaning ring (64); The traction assembly (61) includes a shaft (611), a gear (612) and a traction roller (613), the shaft (611) is rotatably arranged on the receiving shell (5), the rear end of the shaft (611) is provided with a gear (612), and the traction roller (613) is sleeved on the shaft (611), the gears (612) arranged left and right are engaged with each other, and the shaft (611) arranged on the left side is connected with the output shaft of the motor (62); The pulling module (10) includes a gear (101), a winding disc (102), a pulling rope (103) and a direction-changing assembly (104), the gear (101) engaged with the gear (612) is rotatably arranged on the receiving shell (5), the rear end of the gear (101) is provided with a winding disc (102), one end of the winding disc (102) is connected with the pulling rope (103), the other end of the pulling rope (103) passes through the direction-changing assembly (104) and is connected with the movable assembly (72) on the first retraction module (7), and the direction-changing assembly (104) is rotatably arranged on the embedded plate (71) on the first retraction module (7). The first take-up module (7) and the second take-up module (8) are structures with the same structure and size, the first take-up module (7) comprises an embedded plate (71), a movable assembly (72) and a reset spring (73), the embedded plate (71) is embedded at the rear end of the storage shell (5), the left and right ends of the embedded plate (71) are symmetrically provided with movable grooves, the movable assembly (72) is in sliding fit connection with the movable grooves, and the reset spring (73) is connected between the movable assembly (72) and the movable grooves, and the traction cleaning module (6) is used for taking up or paying off the cable (2) by pulling the movable assembly (72).

2. A retractable construction for a guided wave level transmitter according to claim 1, wherein: The movable assembly (72) comprises a movable block (721) and a square hole (722), the movable block (721) is slidably arranged on the movable groove, square holes (722) are uniformly formed on the end face of the movable block (721) close to the take-up roller module (9) from top to bottom, and the reset spring (73) is connected between the movable block (721) and the movable groove.

3. A retractable construction for a guided wave level transmitter according to claim 2, wherein: The take-up roller module (9) comprises an insertion block (91), a cylinder (92) and a rotating roller (93), the cylinder (92) is connected between the insertion blocks (91), the rotating roller (93) is rotatably arranged on the cylinder (92), and the insertion blocks (91) are inserted into the square holes (722).

4. A retractable construction for a guided wave level transmitter according to claim 1, wherein: The gear two (101) and the winding disc (102) are coaxially arranged, and the diameter of the gear two (101) is greater than that of the gear one (612).

5. A retractable construction for a guided wave level transmitter according to claim 1, wherein: The butt joint assembly (11) comprises a connecting rod (111), a butt joint rod (112), a second direction changing frame (113) and a butt joint ring (114), the connecting rod (111) is installed at the lower end of the second take-up module (8), the butt joint rod (112) is installed at the lower end of the connecting rod (111), the butt joint ring (114) is arranged at the rear end of the butt joint rod (112), and the second direction changing frame (113) is installed at the middle portion of the connecting rod (111).

6. A retractable construction for a guided wave level transmitter according to claim 5, wherein: The first direction changing frame (63) and the second direction changing frame (113) are combined to form a complete first circular ring, the cleaning ring (64) and the butt joint ring (114) are combined to form a complete second circular ring, the first circular ring and the second circular ring are coaxially arranged, and the inner walls of the cleaning ring (64) and the butt joint ring (114) are both paved with a detachable cleaning layer.

7. A retractable construction for a guided wave level transmitter according to claim 1, wherein: The back of the storage shell (5) is provided with a dustproof shell (12), and the traction cleaning module (6) and the pulling module (10) are located in the dustproof shell (12).

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