CN115807767B - Safety device for cable protection and water level protection of deep well pump - Google Patents

Abstract

The invention relates to the field of well pump safety, in particular to a safety device for protecting a cable and protecting a water level of a deep well pump, which comprises a pump pipe, a flange plate, a fixing mechanism and a protection mechanism, wherein the pump pipe is used for guiding liquid in the well out of the well through a tubular passage according to power provided by the deep well pump, the pump pipe is sequentially connected with the head and the tail of the pump pipe through bolts to form the tubular passage, the fixing mechanism comprises a cable clamping groove and a cable buckle and is used for determining the installation position and the installation mode of the cable, the protection mechanism comprises a hollow hinge, a cable cover plate and a protection sleeve, the cable cover plate is used for realizing opening and closing operations of the cable cover plate through rotation, and the water level measurement mechanism is used for determining the installation position of the water level measurement mechanism and is respectively connected with the protection mechanism and the deep well pump and is used for measuring the real-time water level in the well. The invention can realize the effects of comprehensive protection of cable safety and water level safety through the cooperation of the components.

Description

Safety device for cable protection and water level protection of deep well pump

Technical Field

The invention relates to the field of well pump safety, in particular to a safety device for protecting a cable and protecting a water level of a deep well pump.

Background

When the well deep-well pump works, the well deep-well pump cable needs to be immersed in geothermal water, so that the deep-well pump cable is in high-temperature geothermal water for a long time, and after long-term immersion, an insulating layer on the surface of the cable is aged and cracked, so that the service life of the cable is shortened, the water level of a common well needs twenty sections of well pipes to ensure the matching of the water level and the water production flow, the deep-well pump is usually connected with the well pipes and is arranged at the bottommost end of the well pipes, the deep-well pump cable is bound and led up along the well pipes, and the cable is bound and led up through more than twenty flange joints.

The patent document of publication No. CN101257199A discloses a cable fixing and protecting method for a deep-well pump, which is characterized in that a sleeve is arranged outside a cable of the deep-well pump, the upper part of the sleeve is connected with a well pipe through a sleeve limiting device and a sleeve sealing device, and the cable is isolated from the external environment through the sleeve, so that the cable of the deep-well pump is protected.

However, the special working position of the deep well pump requires a long cable, the cable rotates uncontrollably along with the pump pipe in the well, the overlong cable is inconvenient to install and detach, the cable is knotted due to vibration in the working process, the deep well pump needs to be restarted out of the well equipment to cause repeated labor and even safety accidents of electric leakage injury, the deep well pump is deeper, the self gravity of the cable can continuously influence the strength of the cable due to the fact that the dead weight cable is heavier and heavier, a cable operator under the well mouth can not effectively pull the cable in the well, the whole well space can be occupied by the cable in the well, the water level measuring instrument cannot be effectively placed down or the measuring instrument probe is blocked or clamped by the unordered cable, the safety accidents occur, due to the special working environment of the deep well pump, the well mouth is fully closed for preventing falling objects in the well during normal operation, the water level observation cannot be carried out by the closed well mouth, the phenomenon that the water level of the system is not only cannot be formed, but also the pump is lost when the water level is lowered too fast can occur, the safety accidents occur, the method cannot fix the cable, and the safety of the water level safety are guaranteed can not be realized.

Disclosure of Invention

Therefore, the invention provides a safety device for protecting the cable and the water level of the deep-well pump, which can solve the problem that the cable cannot be stably fixed and realize the comprehensive protection of the cable safety and the water level safety.

In order to achieve the above object, the present invention provides a safety device for protecting a cable and protecting a water level of a deep well pump, comprising:

the pump pipe is connected with the deep-well pump and used for guiding out liquid in the well to the outside of the well through the tubular passage according to the power provided by the deep-well pump;

the flange plates are arranged at two ends of the pump pipe, through holes with the size equal to the diameter of the pump pipe are formed in the center of the flange plates, threaded through holes are formed in the circumference of the flange plates at equal intervals by taking the axis as a reference, the flange plates are used for sequentially connecting the head parts and the tail parts of the pump pipes through bolts to form tubular passages, and the flange plates are used for determining the installation positions of the fixing mechanism and the protecting mechanism;

the fixing mechanism comprises a cable clamping groove and a cable buckle, wherein the cable clamping groove is respectively connected with the flange plate and the cable buckle and used for determining the installation position and the installation mode of the cable and fixing the cable according to the gravity of the cable;

the protection mechanism comprises a hollow hinge, a cable cover plate and a protection sleeve, wherein the hollow hinge is respectively connected with the cable cover plate, the protection sleeve and the flange plate, the cable cover plate is connected with the protection sleeve, the protection sleeve is connected with the flange plate, the protection sleeve completely covers the pump pipe and the fixing mechanism, so as to avoid the contact of a cable with liquid in a well, the hollow hinge is used for realizing the opening and closing operation of the cable cover plate through rotation, and the installation position of the water level measurement mechanism is determined;

And the water level measuring mechanism is respectively connected with the protection mechanism and the deep well pump and is used for measuring the real-time water level in the well.

Further, the pump pipe comprises a first pump pipe and a plurality of second pump pipes, and the first pump pipe and the second pump pipes are perpendicular to the ground;

one end of the first pump pipe is connected with the water outlet of the deep well pump, and the other end of the first pump pipe is connected with the second pump pipe, so that liquid in the well is led into the second pump pipe;

and a plurality of second pump pipes are sequentially connected end to form a tubular passage for guiding out the liquid in the well to the outside of the well.

Further, the upper surface of the flange plate is provided with a first positioning hole, a second positioning hole, a third positioning hole and a fourth positioning hole at equal intervals according to the first track, the second track, the third track and the fourth track, the first positioning hole, the second positioning hole and the third positioning hole form a positioning hole array together, the positioning hole array is used for determining the installation position of the fixing mechanism, the fourth positioning hole is used for determining the installation position of the protecting mechanism, the diameter of the section of the cable is set as D0, and the diameter of the flange plate is set as a first diameter D1;

the first track is a track which takes the position (1/2) multiplied by D1- (1/4) multiplied by D2 from the circle center of the through hole of the flange as the circle center and D2 as the diameter as the circle center and coincides with the upper surface of the flange, D2 is set as a second diameter, wherein D2 = 3 multiplied by D0;

The second track is a track which is overlapped with the upper surface of the flange after the first track moves by an angle 2 alpha in the anticlockwise direction by taking the edge path of the upper surface of the flange as a reference, wherein

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The third track is a track which is overlapped with the upper surface of the flange after the first track moves by an angle of 4 alpha in the anticlockwise direction by taking the edge path of the upper surface of the flange as a reference;

the fourth track is a track which is overlapped with the upper surface of the flange after the first track moves by an angle 6 alpha in the anticlockwise direction by taking the edge path of the upper surface of the flange as a reference;

the flange plate is provided with a first positioning hole, a second positioning hole, a third positioning hole and a fourth positioning hole, the first positioning hole, the second positioning hole, the third positioning hole and the fourth positioning hole are distributed at equal intervals, the first positioning hole, the second positioning hole and the third positioning hole are used for positioning the mounting position of the fixing mechanism together, and the fourth positioning hole is used for positioning the protection mechanism;

the first positioning hole is a through hole formed in the upper surface of the flange plate along the first track and used for positioning the fixing mechanism together with the second positioning hole and the third positioning hole;

The second positioning hole is a through hole formed in the upper surface of the flange plate along the second track and used for positioning the fixing mechanism together with the first positioning hole and the third positioning hole;

the third positioning hole is a through hole formed in the upper surface of the flange plate along the third track and used for positioning the fixing mechanism together with the first positioning hole and the second positioning hole;

the fourth positioning hole is a through hole formed in the upper surface of the flange plate along the fourth track and used for positioning the protection mechanism.

Further, the lower surface of the flange plate is provided with a first matching groove, a second matching groove and a third matching groove at equal intervals according to a fifth track, a sixth track and a seventh track, the first matching groove, the second matching groove and the third matching groove jointly form a matching groove array, the matching groove array is used for forming clearance fit between the two flange plates, and the thickness of the flange plates is set to be a first depth H1;

the fifth track is a track which is overlapped with the lower surface of the flange after the first track is projected and outwards shifted (1/3) multiplied by D2 in the vertical direction of the lower surface of the flange by taking the circle center of the first track as a reference;

the sixth track is a track which is overlapped with the lower surface of the flange after the first track is projected and outwards shifted (1/3) multiplied by D2 in the vertical direction of the lower surface of the flange by taking the circle center of the second track as a reference;

The seventh track is a track which is overlapped with the lower surface of the flange after the first track is projected and outwards shifted (1/3) multiplied by D2 in the vertical direction of the lower surface of the flange by taking the circle center of the third track as a reference;

the lower surface of the flange plate is provided with a first matching groove, a second matching groove and a third matching groove which are distributed at equal intervals, and the first matching groove, the second matching groove and the third matching groove are used together to form clearance fit with the fixing mechanism;

the first matching groove is a blind hole with the depth of H2 formed on the lower surface of the flange along the fifth track, and is used for forming clearance fit with the fixing mechanism under the combined action of the second matching groove and the third matching groove, the diameter of the first matching groove is set to be a third diameter D3, wherein d3= (4/3) x D2, and H2 is set to be a second depth, wherein h2= (1/4) x H1;

the second matching groove is a blind hole with the depth of H2 formed on the lower surface of the flange along the sixth track and is used for forming clearance fit with the fixing mechanism under the combined action of the first matching groove and the third matching groove;

the third matching groove is a blind hole with the depth of H2 formed in the lower surface of the flange along the seventh track, and the blind hole is used for forming clearance fit with the fixing mechanism under the coaction of the first matching groove and the second matching groove.

Further, the cable clamping groove is a rigid member, the cable clamping groove comprises a first cable clamping groove, a second cable clamping groove and a third cable clamping groove, the first cable clamping groove is respectively connected with the first positioning hole and the first matching groove and used for positioning a first cable, the second cable clamping groove is respectively connected with the second positioning hole and the second matching groove and used for positioning a second cable, and the third cable clamping groove is respectively connected with the third positioning hole and the third matching groove and used for positioning a third cable;

the cable buckle is flexible component, the cable buckle includes first cable buckle, second cable buckle and third cable buckle, first cable buckle with first cable draw-in groove is connected, is used for fixing first cable, the second cable buckle with second cable draw-in groove is connected, is used for fixing the second cable, the third cable buckle with third cable draw-in groove is connected, is used for fixing the third cable.

Further, the first cable clamping groove, the second cable clamping groove and the third cable clamping groove are non-standard parts which are formed by integrating a stepped main body, a round table clamping groove and a clamping groove opening and have the rigidity of not closing a ring shape;

The stepped body is a non-standard part formed by coaxially arranging a first cylinder and a second cylinder into a whole;

the first cylinder is a cylindrical rigid body with a diameter D4 and a height of the second depth H2, and is arranged on the upper surface of the flange plate and used for fixing the position of the second cylinder and for being in clearance fit with the first fit groove, the second fit groove and the third fit groove of the other flange plate, D4 is set to be a fourth diameter, and the fourth diameter D4= (9/10) multiplied by D3;

the second cylinder is a cylindrical rigid body with the diameter of the second diameter D2 and the height of H3, is arranged in the first positioning hole, the second positioning hole and the third positioning hole and is used for bearing working pressure, H3 is set to be a third depth, and the third depth H3 = H1-H2;

the round platform clamping groove is formed in the first cylinder and the second cylinder, the circle center of the upper surface of the first cylinder is used as the circle center, the second diameter D2 is used as the diameter to form a circle, the obtained circle is set to be a first circle, the included angle between the bus of the clamping groove and the plumb line is a first included angle theta, the first diameter D1, the first included angle theta, the second depth H2 and the third depth H3 are calculated according to the formula D5 = D2-2 x tan theta x (H2 + H3) to obtain a fifth diameter D5, the circle center of the lower surface of the second cylinder is used as the circle center, the fifth diameter D5 is used as the diameter to form a circle, the obtained circle is set to be a second circle, the round platform clamping groove is a round platform obtained by cutting the first circle and the second circle to the first cylinder and the second cylinder according to the first included angle theta, the round platform is used for fixing and matching the first cable buckle, the second cable buckle and the third cable buckle, and the H2+ H3 are set to be a fourth depth H4;

The clamping groove opening is formed in the first cylinder and the second cylinder, a rectangular notch with the fourth diameter D4 as the length and the fourth depth H4 as the height is formed, and the rectangular notch is used for laterally mounting the first cable buckle, the second cable buckle and the third cable buckle.

Further, the first cable buckle, the second cable buckle and the third cable buckle are non-standard parts which are formed by integrally forming a truncated cone-shaped main body, a cable through hole and a buckle opening and are flexible and non-closed in ring shape;

the flexible round table component is connected with the round table clamping groove and used for bearing working pressure, and the included angle between the bus and the plumb line is a first included angle theta;

the cable through hole is arranged in the truncated cone-shaped main body, the circle center of the upper surface of the truncated cone-shaped main body is used as the circle center, D6 is used as the circle with the diameter as the circle, the obtained circle is set to be a third circle, the cable through hole is a through hole formed on the truncated cone-shaped main body according to the third circle and used for fixing the first cable, the second cable and the third cable, D6 is set to be a sixth diameter, and the sixth diameter D6= (9/10) multiplied by D0;

The buckle opening is arranged on the circular truncated cone-shaped main body, a rectangular notch with L1 as the length and the fourth depth H4 as the height is formed, and the buckle opening is used for laterally installing the first cable, the second cable and the third cable, L1 is set to be a first length, and the first length L1= (1/2) x D0.

Further, the hollow hinge is connected with the fourth positioning hole, the diameter of the hollow hinge is equal to the second diameter D2, the hollow hinge comprises a first sheet, a second sheet and a hollow pipe, and the first sheet and the second sheet are arranged on the hollow pipe;

the first page piece is fixedly connected to the protective sleeve and used for fixing the second page piece and the hollow tube;

the second leaf is connected with the cable cover plate and rotates freely by taking the hollow tube axis as an axis, so as to realize the opening and closing operation of the cable cover plate;

the inner diameter of the hollow tube is D7, so as to determine the installation position of the water level measuring mechanism, D7 is set as a seventh diameter, and the seventh diameter D7= (11/10) multiplied by D0;

the cable cover plate comprises a rigid cover plate, a flexible cushion block and a bolt, wherein the flexible cushion block is arranged on the inner side of the rigid cover plate;

the rigid cover plate is connected with the second page piece and is used for realizing opening and closing operations through the rotation of the second page piece;

The flexible cushion block is used for protecting the cable to reduce impact;

the bolt is arranged at the joint of the rigid cover plate and the protective sleeve and is used for fixing the rigid cover plate on the protective sleeve.

Further, the water level measuring mechanism comprises a PE pipe, a pressure sensor and a calculating module, wherein the pressure sensor is arranged at the bottom of the PE pipe and is connected with the calculating module;

setting the inner diameter of the PE pipe as an eighth diameter D8, wherein the eighth diameter D8 is equal to the cable section diameter D0 in value, and the bottom of the PE pipe is parallel to the bottom of the deep well pump and communicated with the deep well pump so as to keep synchronization with the real-time water level;

the pressure sensor is used for detecting the real-time pressure F of the water column in the PE pipe and sending the detected real-time pressure result to the calculation module;

the calculation module is used for calculating the real-time water level h of the well according to the real-time pressure result obtained from the pressure sensor.

Further, the calculation module is configured to calculate a real-time water level h of the well based on the real-time pressure result obtained from the pressure sensor, wherein,

substituting the eighth diameter D8, the density rho of the water, the gravity acceleration g and the real-time pressure F into a formula

The magnitude of the real-time water level h of the well is calculated.

Compared with the prior art, the device has the beneficial effects that the working position of the deep-well pump is positioned in a well below the ground level, corresponding cables with equal lengths are needed to be synchronously lowered into the well, the lengths of the cables are overlong and are easy to interfere with each other in work to tie off so as to influence the working efficiency, on the other hand, the device determines the mounting position of the cables through the first positioning holes, the second positioning holes and the third positioning holes which are arranged on the flange plate, so that the mutual interference among the cables is effectively avoided, the stable operation of the device is ensured, the cable clamping grooves and the cables are used in a clamping fit manner, the cables are fixed on the flange plate, the gravity of the cables is dispersed and born on each cable clamping groove, and the problems that the cables cannot be stably fixed and the comprehensive protection of the safety of the cables and the water level safety can be solved.

In particular, two sections of pump pipes are all provided with the ring flange, wherein first pump pipe one end passes through the bolt hole on the ring flange and deep-well pump delivery port fixed connection, the other end pass through the bolt hole on the ring flange with second pump pipe one end is connected, in addition, a plurality of the second pump pipe loops through the bolt hole end to end fixed connection on the ring flange and forms the tubular passageway, has guaranteed the leakproofness between the pump pipes, has increased the reliability of device work, and the multistage design of pump pipe is convenient to detach and overhaul on the one hand has saved working cost effectively, on the other hand, and the design of multistage pump pipe also can carry out the adjustment of adaptability according to different downhole environment and bottom of the hole degree of depth, and is more nimble convenient.

In particular, the tracks of the first positioning hole, the second positioning hole, the third positioning hole and the fourth positioning hole are all non-closed circular arcs with circle centers in the flange plate, and the unique shape design determines that the installation mode of the cable is lateral extrusion type installation rather than traditional axial installation, so that the cable is more convenient to install and detach under the condition of longer cable.

In particular, the first matching groove and the second matching groove are arranged in the third matching groove, so that mutual interference is reduced in the connection process of the flange plates, the connection between pump pipes is ensured not to generate gaps, and the running stability of the device is ensured.

In particular, the round platform-shaped main part upper surface is first circular, and the lower surface is the second circular, and the contained angle of generating line and plumb line is the flexible round platform component of first contained angle θ, with round platform draw-in groove cooperation realizes the fixed to the cable, the cable buckle is flexible component, receives external force effect extrusion deformation, sixth diameter D6 is less than cable diameter D0 makes the cable buckle clamp cable under the elasticity effect reduces relative slip, and the cable drives under self gravity the cable buckle moves down, the cable buckle is used its unique round platform structure to press from both sides tightly along with the increase of gravity to make the cable because self gravity effect between every pump line is automatic to be straightened, avoided the cable interference knot in the course of working effectively, moreover with the gravity dispersion of cable to each on cable draw-in groove and the cable buckle, reduced the stress that the cable bears, both increased the stability of device work, prolonged the life of cable again, improved the security of equipment.

In particular, the hollow hinge is adopted, so that materials can be saved, the water level measuring device can be fixed, the safety of the device is further improved, the cable cover plate and the protective sleeve are connected through the hollow hinge to form a closed space, the cable is protected from friction of underground sand and stones, water-electricity separation is realized, electric leakage accidents are prevented, the flexible cushion block not only protects the cable and reduces impact, but also further helps the cable to be fixed through self elastic clamping, and the stability of the device is further improved.

In particular, the water level measuring mechanism of the invention utilizes the principle of the communicating vessel, so that the liquid level in the PE pipe is kept the same as the liquid level in the well at any time, the real-time liquid level in the well can be obtained by calculating the real-time liquid level in the PE pipe, the phenomenon that the pump is dropped and burnt when the water level is reduced too fast is effectively prevented, the reliability of the device is improved, and the safety of the device is further ensured.

Drawings

FIG. 1 is a schematic structural diagram of a safety device for cable protection and water level protection of a deep well pump according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of the upper surface of a flange plate 1 of a safety device for protecting a cable and protecting a water level of a deep well pump according to an embodiment of the present invention;

Fig. 3 is a schematic structural diagram of the lower surface of the flange 1 of the safety device for protecting the cable and protecting the water level of the deep well pump according to the embodiment of the present invention;

fig. 4 is a schematic structural diagram of a first cable slot of a safety device for protecting a cable and protecting a water level of a deep well pump according to an embodiment of the present invention;

FIG. 5 is a cross-sectional view of a first cable slot of a safety device for protecting a cable and protecting a water level of a deep well pump according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a first cable buckle of a safety device for protecting a cable and protecting a water level of a deep well pump according to an embodiment of the present invention;

fig. 7 is a structural cross-sectional view of a first cable buckle of a safety device for protecting a cable and protecting a water level of a deep well pump according to an embodiment of the present invention;

FIG. 8 is a cross-sectional view of a water level measuring mechanism of a safety device for cable protection and water level protection of a deep well pump according to an embodiment of the present invention;

in the figure: 1-ring flange, 2-screw through hole, 3-hollow hinge, 4-protection sleeve, 5-cable apron, 6-first locating hole, 7-second locating hole, 8-third locating hole, 9-fourth locating hole, 10-first mating groove, 11-second mating groove, 12-third mating groove, 13-first cable draw-in groove, 14-draw-in groove opening, 15-first cylinder, 16-second cylinder, 17-round platform draw-in groove, 18 first cable buckle, 19-buckle opening, 20-cable through hole, 21-PE pipe, 22-pressure sensor.

Detailed Description

In order that the objects and advantages of the invention will become more apparent, the invention will be further described with reference to the following examples; it should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention.

It should be noted that, in the description of the present invention, terms such as "upper," "lower," "left," "right," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

Furthermore, it should be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.

Referring to fig. 1 to 3, a safety device for protecting a cable and protecting a water level of a deep well pump according to an embodiment of the present invention includes:

the pump pipe is connected with the deep well pump and used for guiding water in the well out of the well through the tubular passage according to the power provided by the deep well pump;

the flange plate 1 is arranged at two ends of the pump pipe, a through hole with the size equal to the diameter of the pump pipe is arranged in the center of the flange plate 1, threaded through holes 2 are circumferentially arranged on the flange plate 1 at equal intervals by taking the axis as a reference, the flange plate 1 is used for sequentially connecting the head parts and the tail parts of a plurality of pump pipes through bolts to form a tubular passage, and the flange plate is used for determining the installation positions of the fixing mechanism and the protecting mechanism;

the fixing mechanism comprises a cable clamping groove and a cable buckle, wherein the cable clamping groove is respectively connected with the flange plate 1 and the cable buckle and is used for determining the installation position and the installation mode of a cable and fixing the cable according to the self gravity of the cable;

the protection mechanism comprises a hollow hinge 3, a cable cover plate 5 and a protection sleeve 4, wherein the hollow hinge 3 is respectively connected with the cable cover plate 5, the protection sleeve 4 and the flange plate 1, the cable cover plate 5 is connected with the protection sleeve 4, the protection sleeve 4 is connected with the flange plate 1, the protection sleeve 4 completely covers the pump pipe and the fixing mechanism so as to prevent a cable from being contacted with water in a well, the hollow hinge 3 is used for realizing opening and closing operations of the cable cover plate 5 through rotation, and is used for determining the installation position of the water level measurement mechanism;

And the water level measuring mechanism is respectively connected with the protection mechanism and the deep well pump and is used for measuring the real-time water level in the well.

Specifically, the deep-well pump working position is in the well below the ground level, corresponding cable synchronous well descending that also needs isometric, and the overlength of cable is on the one hand easy at work and is interfered with each other to tie up and influence work efficiency, thereby on the other hand because the gravity of self bears great stress to accelerate the damage degree of cable, this device has confirmed the mounted position of cable through setting up at ring flange 1, effectively avoids the mutual interference between the cable to guarantee the steady operation of device.

Specifically, cable draw-in groove and cable snap fit use, fix the cable on the ring flange 1, bear the gravity dispersion of cable self on each the cable draw-in groove can solve and can not be stably fixed the cable, realizes the problem of the comprehensive protection of cable safety and water level safety.

Specifically, the pump pipe comprises a first pump pipe and a plurality of second pump pipes, and the first pump pipe and the second pump pipes are both arranged perpendicular to the ground;

one end of the first pump pipe is connected with the water outlet of the deep well pump, and the other end of the first pump pipe is connected with the second pump pipe, so that water in the well is guided into the second pump pipe;

And a plurality of second pump pipes are sequentially connected end to form a tubular passage for guiding out water in the well to the outside of the well.

Specifically, two sections of pump pipes are provided with a flange plate 1, one end of the first pump pipe is fixedly connected with a deep-well pump water outlet through a bolt hole in the flange plate 1, the other end of the first pump pipe is connected with one end of the second pump pipe through a bolt hole in the flange plate 1, and in addition, a plurality of second pump pipes sequentially form a tubular passage through the head and tail fixed connection of the bolt holes in the flange plate 1, so that the tightness between the pump pipes is ensured, and the working reliability of the device is improved.

Specifically, the multistage design of pump line on the one hand convenient to detach and maintenance has saved working cost effectively, and on the other hand, the design of multistage pump line also can carry out the adjustment of adaptability according to different downhole environment and bottom hole degree of depth, and is more nimble convenient.

Specifically, referring to fig. 2, the upper surface of the flange 1 is equidistantly provided with a first positioning hole 6, a second positioning hole 7, a third positioning hole 8 and a fourth positioning hole 9 according to a first track, a second track, a third track and a fourth track, the first positioning hole 6, the second positioning hole 7 and the third positioning hole 8 together form a positioning hole array, the positioning hole array is used for determining the installation position of the fixing mechanism, the fourth positioning hole 9 is used for determining the installation position of the protecting mechanism, the diameter of the section of the cable is set to D0, and the diameter of the flange is set to a first diameter D1;

The first track is a track which is formed by taking a position (1/2) multiplied by D1- (1/4) multiplied by D2 from the center of a through hole of the flange plate 1 as the center of a circle and D2 as the diameter as the circle and is overlapped with the upper surface of the flange plate 1, and D2 is set as a second diameter, wherein d2=3×d0;

the second track is a track overlapping with the upper surface of the flange plate 1 after the first track moves by an angle 2 alpha in the counterclockwise direction based on the edge path of the upper surface of the flange plate 1, wherein

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The third track is a track which is overlapped with the upper surface of the flange plate 1 after the first track moves by an angle of 4 alpha in the anticlockwise direction by taking the edge path of the upper surface of the flange plate 1 as a reference;

the fourth track is a track which is overlapped with the upper surface of the flange plate 1 after the first track moves by an angle 6 alpha in the anticlockwise direction by taking the edge path of the upper surface of the flange plate 1 as a reference;

the flange plate 1 is provided with a first positioning hole 6, a second positioning hole 7, a third positioning hole 8 and a fourth positioning hole 9, the first positioning hole 6, the second positioning hole 7, the third positioning hole 8 and the fourth positioning hole 9 are distributed at equal intervals, the first positioning hole 6, the second positioning hole 7 and the third positioning hole 8 are used for positioning the mounting position of the fixing mechanism together, and the fourth positioning hole 9 is used for positioning the protection mechanism;

The first positioning hole 6 is a through hole formed in the upper surface of the flange plate 1 along the first track, and is used for positioning the fixing mechanism together with the second positioning hole 7 and the third positioning hole 8;

the second positioning hole 7 is a through hole formed in the upper surface of the flange plate 1 along the second track, and is used for positioning the fixing mechanism together with the first positioning hole 6 and the third positioning hole 8;

the third positioning hole 8 is a through hole formed in the upper surface of the flange plate 1 along the third track, and is used for positioning the fixing mechanism together with the first positioning hole 6 and the second positioning hole 7;

the fourth positioning hole 9 is a through hole formed on the upper surface of the flange plate 1 along the fourth track, and is used for positioning the protection mechanism.

Specifically, the circle center (1/2) x D1- (1/4) x D2 of the hole of the flange plate 1 is selected according to experience, so that the formed track is not completely positioned on the upper surface of the flange plate, the tracks of the first positioning hole 6, the second positioning hole 7, the third positioning hole 8 and the fourth positioning hole 9 are all non-closed circular arcs with the circle centers positioned in the flange plate 1, and the unique shape design determines that the installation mode of the cable is lateral extrusion type installation rather than traditional axial installation, so that the cable is more convenient to install and detach under the condition of longer cable.

Specifically, as shown in fig. 3, the lower surface of the flange 1 is provided with a first matching groove 10, a second matching groove 11 and a third matching groove 12 at equal intervals according to a fifth track, a sixth track and a seventh track, the first matching groove 11, the second matching groove 12 and the third matching groove 13 together form a matching groove array, the matching groove array is used for forming clearance fit between the two flanges 1, and the thickness of the flanges is set to be a first depth H1;

the edge of the lower surface of the flange plate 1 is provided with a first matching groove 10, a second matching groove 11 and a third matching groove 12 at equal intervals according to a fifth track, a sixth track and a seventh track, and the lower surface of the flange plate 1 is provided with the fifth track, the sixth track and the seventh track at equal intervals;

the fifth track is a track which is overlapped with the lower surface of the flange plate 1 after the first track is projected and outwards offset (1/3) multiplied by D2 in the vertical direction of the lower surface of the flange plate 1 by taking the circle center of the first track as a reference;

the sixth track is a track which is overlapped with the lower surface of the flange plate 1 after the first track is projected and outwards offset (1/3) multiplied by D2 in the vertical direction of the lower surface of the flange plate 1 by taking the circle center of the second track as a reference;

The seventh track is a track which is overlapped with the lower surface of the flange plate 1 after the first track is projected and outwards shifted (1/3) x D2 in the vertical direction of the lower surface of the flange plate 1 by taking the circle center of the third track as a reference;

the lower surface of the flange plate 1 is provided with a first matching groove 10, a second matching groove 11 and a third matching groove 12, the first matching groove 10, the second matching groove 11 and the third matching groove 12 are distributed at equal intervals, and the first matching groove 10, the second matching groove 11 and the third matching groove 12 are jointly used for forming clearance fit with the fixing mechanism;

the first fitting groove 10 is a blind hole with a depth H2 formed on the lower surface of the flange 1 along the fifth track, and is used for forming clearance fit with the fixing mechanism under the combined action of the second fitting groove 11 and the third fitting groove 12, the diameter of the first fitting groove 10 is set to be a third diameter D3, wherein d3= (4/3) x D2, and H2 is set to be a second depth, wherein h2= (1/4) x H1;

the second matching groove 11 is a blind hole with a depth H2 formed on the lower surface of the flange plate 1 along the sixth track, and is used for forming clearance fit with the fixing mechanism under the coaction of the first matching groove 10 and the third matching groove 12;

The third matching groove 12 is a blind hole with a depth H2 formed on the lower surface of the flange plate 1 along the seventh track, and is used for forming clearance fit with the fixing mechanism under the coaction of the first matching groove 10 and the second matching groove 11.

Specifically, the third diameter D3 is the diameter of the track that coincides with the lower surface of the flange plate 1 after the second diameter is offset (1/3) x D2 in the projection in the vertical direction of the lower surface of the flange plate 1, so d3= (4/3) x D2, and the first, second and third mating grooves 10, 11 and 12 are used to reduce the connection interference between the flange plates 1 and the interference between the lower surface of the upper flange plate 1 and the fixing mechanism on the lower flange plate 1, so that the clearance mating relationship between the two can be ensured.

Specifically, the arrangement of the first matching groove 10, the second matching groove 11 and the third matching groove 12 reduces the mutual interference of the connection of the flange plates 1, so that the connection between pump pipes is ensured not to generate gaps, and the running stability of the device is ensured.

Specifically, referring to fig. 4 to 7, the cable clamping groove is a rigid member, and includes a first cable clamping groove 13, a second cable clamping groove and a third cable clamping groove, where the first cable clamping groove 13 is connected with the first positioning hole 6 and the first matching groove 10 respectively, and is used for positioning a first cable, the second cable clamping groove is connected with the second positioning hole 7 and the second matching groove 11 respectively, and is used for positioning a second cable, and the third cable clamping groove is connected with the third positioning hole 8 and the third matching groove 12 respectively, and is used for positioning a third cable;

The cable buckle is flexible component, the cable buckle includes first cable buckle 18, second cable buckle and third cable buckle, first cable buckle 18 with first cable draw-in groove 13 is connected, is used for fixing first cable, the second cable buckle with second cable draw-in groove is connected, is used for fixing the second cable, the third cable buckle with third cable draw-in groove is connected, is used for fixing the third cable.

Specifically, the first cable clamp 18 is matched with the first cable clamping groove 13, the second cable clamp is matched with the second cable clamping groove, and the third cable clamp is matched with the third cable clamping groove.

Specifically, the first cable clamping groove 13, the second cable clamping groove, the third cable clamping groove, the first cable clamping buckle 18, the second cable clamping buckle and the third cable clamping buckle are independent components and are convenient to process and shape independently, stress concentration is easier to generate in the working process of the special-shaped components, damage to the components is caused, the components which are processed and shaped independently can be replaced in time, the main structure of the dismounting device is not needed, the working cost is saved, and the maintenance difficulty is reduced.

Specifically, referring to fig. 4 and 5, the first cable clamping groove 13, the second cable clamping groove and the third cable clamping groove are non-standard components which are formed integrally by three parts of a stepped main body, a circular truncated cone clamping groove 17 and a clamping groove opening 14 and have non-closed rigidity;

the stepped body is a non-standard part formed by coaxially arranging a first cylinder 15 and a second cylinder 16 into a whole;

the first cylinder 15 is a cylindrical rigid body with a diameter D4 and a height of the second depth H2, the first cylinder 15 is disposed on the upper surface of the flange 1, for fixing the position of the second cylinder 16, and for clearance fit with the first fit groove 10, the second fit groove 11 and the third fit groove 12 of the other flange 1, D4 is set as a fourth diameter, and the fourth diameter d4= (9/10) ×d3;

the second cylinder 16 is a cylindrical rigid body with a diameter of the second diameter D2 and a height of H3, and is disposed in the first positioning hole 6, the second positioning hole 7 and the third positioning hole 8, so as to bear working pressure, and H3 is set to a third depth, and the third depth h3=h1-H2;

the circular table clamping groove 17 is arranged in the first cylinder 15 and the second cylinder 16, the circle center of the upper surface of the first cylinder 15 is used as the circle center, the second diameter D2 is used as the diameter, the obtained circle is set as a first circle, the included angle between the bus of the circular table clamping groove and the plumb line is a first included angle theta, the first diameter D1, the first included angle theta, the second depth H2 and the third depth H3 are calculated according to the formula D5=D2-2×tan theta× (H2+H2), the fifth diameter D5 is calculated by taking the circle center of the lower surface of the second cylinder as the circle center and the fifth diameter D5 as the diameter, the obtained circle is set as a second circle, the circular table clamping groove 17 is a circular table cambered surface obtained by cutting the first cylinder 15 and the second cylinder 16 according to the first included angle theta, and is used for fixing and matching the first cable buckle 18, the second cable buckle and the third cable buckle and the fourth depth H4+H2+H2 is set as the fourth depth H4;

The slot opening 14 is disposed on the first cylinder and the second cylinder, and is provided with a rectangular notch with the fourth diameter D4 being a length, the fourth depth and the H4 being a height, so as to laterally install the first cable buckle 18, the second cable buckle and the third cable buckle.

Specifically, the fourth diameter d4= (9/10) ×d3 is selected empirically, so that the first cylinder and the corresponding mating groove are in clearance fit, the diameters of the first positioning hole 6, the second positioning hole 7 and the third positioning hole 8 and the second cylinder 16 are equal to each other and are the second diameter D2, so that the cable clamping groove is fixed in the first positioning hole 6, the second positioning hole 7 and the third positioning hole 8, the depths of the first mating groove 10, the second mating groove 11 and the third mating groove 12 and the heights of the first cylinder 15 are equal to each other and are the second depth H2, and the third diameter D3 is larger than the fourth diameter D4, so that the cable clamping groove and the first mating groove 10, the second mating groove 11 and the third mating groove 12 form clearance fit, the cable clamping groove is a rigid member, the cable clamping groove is a cable bearing member, and the cable clamping groove is not used for side-to-mounting and the cable clamping device is not used for side-to-mounting.

Specifically, referring to fig. 6 and 7, the first cable clamp 18, the second cable clamp and the third cable clamp are non-standard components which are formed by three parts of a truncated cone-shaped main body, a cable through hole 20 and a clamp opening 19 in an integrated manner and are flexible and not closed in a ring shape;

the upper surface of the circular truncated cone-shaped main body is the first circle, the lower surface of the circular truncated cone-shaped main body is the second circle, and the included angle between the bus and the plumb line is a flexible circular truncated cone member with a first included angle theta, and the flexible circular truncated cone member is connected with the circular truncated cone clamping groove 17 and used for bearing working pressure;

the cable through hole 20 is arranged inside the truncated cone-shaped main body, the circle is formed by taking the center of the circle on the upper surface of the truncated cone-shaped main body as the center of the circle and taking D6 as the diameter as the circle, the obtained circle is set to be a third circle, the cable through hole 20 is a through hole formed on the truncated cone-shaped main body according to the third circle and is used for fixing the first cable, the second cable and the third cable, D6 is set to be a sixth diameter, and the sixth diameter D6= (9/10) multiplied by D0;

the fastening opening 19 is disposed on the truncated cone-shaped body, and is provided with a rectangular notch having a length L1 and a height of a fourth depth H4, and is used for laterally mounting the first cable, the second cable and the third cable, and setting L1 to be a first length, where l1= (1/2) x D0.

Specifically, the sixth diameter d6= (9/10) ×d0 is selected according to experience, because the cable clamping groove is made of flexible materials, the diameter is slightly smaller than the cable diameter and is favorable for transverse clamping, the upper surface of the circular truncated cone-shaped main body is the first circular shape, the lower surface of the circular truncated cone-shaped main body is the second circular shape, the included angle between the bus and the plumb line is a flexible truncated cone member of the first included angle θ, the flexible truncated cone member is matched with the circular truncated cone clamping groove 17 to fix the cable, the cable clamping buckle is a flexible member and is extruded and deformed under the action of external force, the sixth diameter D6 is smaller than the cable diameter D0, the cable clamping buckle is enabled to clamp the cable under the action of elasticity, the cable clamping buckle is enabled to move downwards under the action of self gravity, the cable clamping buckle is enabled to clamp with the increase of gravity, and accordingly the cable is enabled to be automatically straightened under the action of self gravity, interference and knotting of the cable in the working process are effectively avoided, the gravity of the cable is dispersed to each cable clamping groove and the cable clamping buckle, the cable clamping buckle is reduced, the stress born by the cable clamping buckle is reduced, the cable clamping device is enabled to be not to be closed, the side, the safety and the service life of the device is improved, and the safety of the device is improved.

Specifically, the hollow hinge 3 is connected with the fourth positioning hole 9, the diameter of the hollow hinge 3 is equal to the second diameter D2, the hollow hinge 3 comprises a first sheet, a second sheet and a hollow tube, and the first sheet and the second sheet are both arranged on the hollow tube;

the first page piece is fixedly connected to the protective sleeve 4 and used for fixing the second page piece and the hollow tube;

the second leaf is connected with the cable cover plate 5 and rotates freely by taking the hollow pipe axis as a shaft, so as to realize the opening and closing operation of the cable cover plate 5;

the inner diameter of the hollow tube is D7, so as to determine the installation position of the water level measuring mechanism, D7 is set as a seventh diameter, and the seventh diameter D7= (11/10) multiplied by D0;

the cable cover plate 5 comprises a rigid cover plate, a flexible cushion block and a bolt, and the flexible cushion block is arranged on the inner side of the rigid cover plate;

the rigid cover plate is connected with the second page piece and is used for realizing opening and closing operations through the rotation of the second page piece;

the flexible cushion block is used for protecting the cable to reduce impact;

the bolt is arranged at the joint of the rigid cover plate and the protective sleeve 4 and is used for fixing the rigid cover plate on the protective sleeve 4.

Specifically, the seventh diameter d7= (11/10) ×d0 is selected according to experience, in order to ensure that the inner diameter of the hollow pipe is larger than that of the PE pipe, the hollow hinge 3 is adopted, so that materials can be saved, a water level measuring device can be fixed, the safety of the device is further improved, the cable cover plate 5 and the protection sleeve 4 are connected through the hollow hinge 3 to form a closed space, the cable is protected from friction of underground sand and stones, water and electricity separation is realized, leakage accidents are prevented, the flexible cushion block not only protects the cable, reduces impact, but also further helps the cable to be fixed through self elastic clamping of the cable, and the stability of the device is further improved.

Specifically, referring to fig. 8, the water level measuring mechanism includes a PE pipe 21, a pressure sensor 22, and a calculating module, where the pressure sensor 22 is disposed at the bottom of the PE pipe 21, and the pressure sensor 22 is connected to the calculating module;

setting the inner diameter of the PE pipe 21 as an eighth diameter D8, wherein the eighth diameter D8 is equal to the cable section diameter D0 in value, and the bottom of the PE pipe 21 is parallel to the bottom of the deep well pump and communicated with the deep well pump so as to keep synchronous with the real-time water level;

the pressure sensor 22 is configured to detect a real-time pressure F of the water column in the PE pipe 21, and send a detected real-time pressure result to the calculation module;

The calculation module is configured to calculate a real-time water level h of the well based on the real-time pressure results obtained from the pressure sensor 22.

Specifically, because of the special working environment of the deep-well pump, the well mouth is fully sealed to prevent falling objects in the well during normal operation, the sealed well mouth cannot observe the water level, so that system water quantity and water level observation data cannot be formed, pump burning phenomenon when the water level is reduced too fast can occur, and the water level in the well is monitored very necessarily in real time.

Specifically, the water level measuring mechanism of the invention uses the principle of communicating vessels, so that the liquid level in the PE pipe 21 is kept the same as the liquid level in the well at any time, the real-time liquid level in the well can be obtained by calculating the real-time liquid level in the PE pipe 21, the phenomenon that the pump is dropped and burnt when the water level is reduced too fast is effectively prevented, the reliability of the device is improved, the safety of the device is further ensured, and meanwhile, the PE pipe 21 is arranged in the hollow pipe of the hollow hinge 3, so that the cost is saved for one piece.

In particular, the calculation module is configured to calculate a real-time water level h of the well from the real-time pressure results obtained from the pressure sensor 22, wherein,

Substituting the eighth diameter D8, the density rho of the water, the gravity acceleration g and the real-time pressure F into a formula

The magnitude of the real-time water level h of the well is calculated.

Specifically, the quality of the water in the PE pipe 21 can be obtained according to the real-time pressure F and the gravitational acceleration g measured in real time by the pressure sensor 22, and the real-time water level h of the well can be obtained through calculation by knowing the value of the eighth diameter D8, so that the safety of the device is further ensured.

Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will be within the scope of the present invention.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention; various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (8)

1. A safety device for cable protection and water level protection of a deep well pump, comprising:

the pump pipe is connected with the deep-well pump and used for guiding out liquid in the well to the outside of the well through the tubular passage according to the power provided by the deep-well pump;

the flange plates are arranged at two ends of the pump pipe, through holes with the size equal to the diameter of the pump pipe are formed in the center of the flange plates, threaded through holes are formed in the circumference of the flange plates at equal intervals by taking the axis as a reference, the flange plates are used for sequentially connecting the head parts and the tail parts of the pump pipes through bolts to form tubular passages, and the flange plates are used for determining the installation positions of the fixing mechanism and the protecting mechanism;

the fixing mechanism comprises a cable clamping groove and a cable buckle, wherein the cable clamping groove is respectively connected with the flange plate and the cable buckle and used for determining the installation position and the installation mode of the cable and fixing the cable according to the gravity of the cable;

the protection mechanism comprises a hollow hinge, a cable cover plate and a protection sleeve, wherein the hollow hinge is respectively connected with the cable cover plate, the protection sleeve and the flange plate, the cable cover plate is connected with the protection sleeve, the protection sleeve is connected with the flange plate, the protection sleeve completely covers the pump pipe and the fixing mechanism, so as to avoid the contact of a cable with liquid in a well, the hollow hinge is used for realizing the opening and closing operation of the cable cover plate through rotation, and the installation position of the water level measurement mechanism is determined;

The water level measuring mechanism is respectively connected with the protection mechanism and the deep well pump and is used for measuring the real-time water level in the well;

the pump pipes comprise a first pump pipe and a plurality of second pump pipes, and the first pump pipe and the second pump pipes are perpendicular to the ground;

one end of the first pump pipe is connected with the water outlet of the deep well pump, and the other end of the first pump pipe is connected with the second pump pipe, so that liquid in the well is led into the second pump pipe;

the second pump pipes are sequentially connected end to form a tubular passage for guiding out the liquid in the well to the outside of the well;

the upper surface of the flange plate is provided with a first positioning hole, a second positioning hole, a third positioning hole and a fourth positioning hole at equal intervals according to a first track, a second track, a third track and a fourth track, the first positioning hole, the second positioning hole and the third positioning hole form a positioning hole array together, the positioning hole array is used for determining the installation position of the fixing mechanism, the fourth positioning hole is used for determining the installation position of the protection mechanism, the diameter of the section of the cable is set as D0, and the diameter of the flange plate is set as a first diameter D1;

the first track is a track which takes a position which is the center D2 of a circle and is the distance from the center (1/2) x D1- (1/4) x D2 of the through hole of the flange as a circle, and coincides with the upper surface of the flange, the diameter of the section of the cable is set as D0, and D2 is set as a second diameter, wherein d2=3×d0;

The second track is a track which is overlapped with the upper surface of the flange after the first track moves by an angle 2 alpha in the anticlockwise direction by taking the edge path of the upper surface of the flange as a reference, wherein；

The third track is a track which is overlapped with the upper surface of the flange after the first track moves by an angle of 4 alpha in the anticlockwise direction by taking the edge path of the upper surface of the flange as a reference;

the fourth track is a track which is overlapped with the upper surface of the flange after the first track moves by an angle 6 alpha in the anticlockwise direction by taking the edge path of the upper surface of the flange as a reference;

the flange plate is provided with a first positioning hole, a second positioning hole, a third positioning hole and a fourth positioning hole, the first positioning hole, the second positioning hole, the third positioning hole and the fourth positioning hole are distributed at equal intervals, the first positioning hole, the second positioning hole and the third positioning hole are used for positioning the mounting position of the fixing mechanism together, and the fourth positioning hole is used for positioning the protection mechanism;

the first positioning hole is a through hole formed in the upper surface of the flange plate along the first track and used for positioning the fixing mechanism together with the second positioning hole and the third positioning hole;

The second positioning hole is a through hole formed in the upper surface of the flange plate along the second track and used for positioning the fixing mechanism together with the first positioning hole and the third positioning hole;

the third positioning hole is a through hole formed in the upper surface of the flange plate along the third track and used for positioning the fixing mechanism together with the first positioning hole and the second positioning hole;

the fourth positioning hole is a through hole formed in the upper surface of the flange plate along the fourth track and used for positioning the protection mechanism.

2. The safety device for protecting the cable and the water level of the deep-well pump according to claim 1, wherein the lower surface of the flange plate is provided with a first matching groove, a second matching groove and a third matching groove at equal intervals according to a fifth track, a sixth track and a seventh track, the first matching groove, the second matching groove and the third matching groove jointly form a matching groove array, the matching groove array is used for forming clearance fit between the two flange plates, and the thickness of the flange plate is set to be a first depth H1;

the fifth track is a track which is overlapped with the lower surface of the flange after the first track is projected and outwards shifted (1/3) multiplied by D2 in the vertical direction of the lower surface of the flange by taking the circle center of the first track as a reference;

The sixth track is a track which is overlapped with the lower surface of the flange after the first track is projected and outwards shifted (1/3) multiplied by D2 in the vertical direction of the lower surface of the flange by taking the circle center of the second track as a reference;

the seventh track is a track which is overlapped with the lower surface of the flange after the first track is projected and outwards shifted (1/3) multiplied by D2 in the vertical direction of the lower surface of the flange by taking the circle center of the third track as a reference;

the lower surface of the flange plate is provided with a first matching groove, a second matching groove and a third matching groove which are distributed at equal intervals, and the first matching groove, the second matching groove and the third matching groove are used together to form clearance fit with the fixing mechanism;

the first matching groove is a blind hole with the depth of H2 formed on the lower surface of the flange along the fifth track, and is used for forming clearance fit with the fixing mechanism under the combined action of the second matching groove and the third matching groove, the diameter of the first matching groove is set to be a third diameter D3, wherein d3= (4/3) x D2, and H2 is set to be a second depth, wherein h2= (1/4) x H1;

The second matching groove is a blind hole with the depth of H2 formed on the lower surface of the flange along the sixth track and is used for forming clearance fit with the fixing mechanism under the combined action of the first matching groove and the third matching groove;

the third matching groove is a blind hole with the depth of H2 formed in the lower surface of the flange along the seventh track, and the blind hole is used for forming clearance fit with the fixing mechanism under the coaction of the first matching groove and the second matching groove.

3. The safety device for protecting the cable and protecting the water level of the deep-well pump according to claim 2, wherein the cable clamping groove is a rigid member, the cable clamping groove comprises a first cable clamping groove, a second cable clamping groove and a third cable clamping groove, the first cable clamping groove is respectively connected with the first positioning hole and the first matching groove and used for positioning a first cable, the second cable clamping groove is respectively connected with the second positioning hole and the second matching groove and used for positioning a second cable, and the third cable clamping groove is respectively connected with the third positioning hole and the third matching groove and used for positioning a third cable;

the cable buckle is flexible component, the cable buckle includes first cable buckle, second cable buckle and third cable buckle, first cable buckle with first cable draw-in groove is connected, is used for fixing first cable, the second cable buckle with second cable draw-in groove is connected, is used for fixing the second cable, the third cable buckle with third cable draw-in groove is connected, is used for fixing the third cable.

4. The safety device for protecting a cable and protecting a water level of a deep well pump according to claim 3, wherein the first cable clamping groove, the second cable clamping groove and the third cable clamping groove are non-standard parts which are formed integrally by a stepped main body, a round table clamping groove and a clamping groove opening and have non-closed rigidity;

the stepped body is a non-standard part formed by coaxially arranging a first cylinder and a second cylinder into a whole;

the first cylinder is a cylindrical rigid body with a diameter D4 and a height of the second depth H2, and is arranged on the upper surface of the flange plate and used for fixing the position of the second cylinder and for being in clearance fit with the first fit groove, the second fit groove and the third fit groove of the other flange plate, D4 is set to be a fourth diameter, and the fourth diameter D4= (9/10) multiplied by D3;

the second cylinder is a cylindrical rigid body with the diameter of the second diameter D2 and the height of H3, is arranged in the first positioning hole, the second positioning hole and the third positioning hole and is used for bearing working pressure, H3 is set to be a third depth, and the third depth H3 = H1-H2;

the round platform clamping groove is formed in the first cylinder and the second cylinder, the circle center of the upper surface of the first cylinder is taken as the circle center, the second diameter D2 is taken as the diameter to be a circle, the obtained circle is set to be a first circle, the included angle between a bus of the clamping groove and a plumb line is set to be a first included angle theta, the first diameter D1, the first included angle theta, the second depth H2 and the third depth H3 are calculated according to the formula D5 = D2-2 x tan theta x (H2 + H3) to obtain a fifth diameter D5, the circle center of the lower surface of the second cylinder is taken as the circle center, the fifth diameter D5 is taken as the diameter to be a circle, the obtained circle is set to be a second circle, the round platform clamping groove is a cambered surface obtained by cutting the first circle and the second circle to the first cylinder and the second cylinder according to the first included angle theta, and is used for fixing and matching the first cable buckle, the second cable buckle and the third cable buckle, and the H2+ H3 are set to be a fourth depth H4;

The clamping groove opening is formed in the first cylinder and the second cylinder, a rectangular notch with the fourth diameter D4 as the length and the fourth depth H4 as the height is formed, and the rectangular notch is used for laterally mounting the first cable buckle, the second cable buckle and the third cable buckle.

5. The safety device for protecting a cable and protecting a water level of a deep well pump according to claim 4, wherein the first cable fastener, the second cable fastener and the third cable fastener are non-standard parts which are formed integrally by a truncated cone-shaped main body, a cable through hole and a fastener opening and are flexible and not closed in a ring shape;

the flexible round table component is connected with the round table clamping groove and used for bearing working pressure, and the included angle between the bus and the plumb line is a first included angle theta;

the cable through hole is arranged in the circular truncated cone-shaped main body, the circle center of the circle on the upper surface of the circular truncated cone-shaped main body is taken as a circle center D6, the circle is taken as a circle with the diameter, the obtained circle is set as a third circle, the cable through hole is a through hole formed on the circular truncated cone-shaped main body according to the third circle and used for fixing the first cable, the second cable and the third cable, D6 is set as a sixth diameter, and the sixth diameter D6= (9/10) multiplied by D0;

The buckle opening set up in on the round platform shape main part, set up with L1 as length fourth degree of depth and H4 is high rectangle breach, be used for the side direction installation first cable second cable with the third cable, set L1 as first length, first length L1= (1/2) x D0.

6. The safety device for cable protection and water level protection of a deep well pump according to claim 5, wherein the hollow hinge is connected with the fourth positioning hole, the diameter of the hollow hinge is equal to the second diameter D2, the hollow hinge comprises a first sheet, a second sheet and a hollow tube, and the first sheet and the second sheet are arranged on the hollow tube;

the first page piece is fixedly connected to the protective sleeve and used for fixing the second page piece and the hollow tube;

the second leaf is connected with the cable cover plate and rotates freely by taking the hollow tube axis as an axis, so as to realize the opening and closing operation of the cable cover plate;

the inner diameter of the hollow tube is D7, so as to determine the installation position of the water level measuring mechanism, D7 is set as a seventh diameter, and the seventh diameter D7= (11/10) multiplied by D0;

the cable cover plate comprises a rigid cover plate, a flexible cushion block and a bolt, wherein the flexible cushion block is arranged on the inner side of the rigid cover plate;

The rigid cover plate is connected with the second page piece and is used for realizing opening and closing operations through the rotation of the second page piece;

the flexible cushion block is used for protecting the cable to reduce impact;

the bolt is arranged at the joint of the rigid cover plate and the protective sleeve and is used for fixing the rigid cover plate on the protective sleeve.

7. The safety device for protecting the cable and the water level of the deep-well pump according to claim 6, wherein the water level measuring mechanism comprises a PE pipe, a pressure sensor and a calculation module, the pressure sensor is arranged at the bottom of the PE pipe, and the pressure sensor is connected with the calculation module;

setting the inner diameter of the PE pipe as an eighth diameter D8, wherein the eighth diameter D8 is equal to the cable section diameter D0 in value, and the bottom of the PE pipe is parallel to the bottom of the deep well pump and communicated with the deep well pump so as to keep synchronization with the real-time water level;

the pressure sensor is used for detecting the real-time pressure F of the water column in the PE pipe and sending the detected real-time pressure result to the calculation module;

the calculation module is used for calculating the real-time water level h of the well according to the real-time pressure result obtained from the pressure sensor.

8. The safety device for cable protection and water level protection of a deep well pump of claim 7, wherein the calculation module is configured to calculate a real-time water level h of the well from a real-time pressure result obtained from the pressure sensor;

Substituting the eighth diameter D8, the density rho of the water, the gravity acceleration g and the real-time pressure F into a formula

The magnitude of the real-time water level h of the well is calculated.