A flow monitoring device for water conservancy projects

Abstract

The present invention relates to a flow monitoring technology, which is used to solve the problem that water plants entangle a turbine and solid particles cause blade damage, which affects the accuracy of flow meter detection data. Specifically, it is a flow monitoring device for water conservancy projects, including a flow meter. The present invention pulls a traction line through a sliding block that slides on a reciprocating screw to drive a sleeve frame to slide on the surface of a blade, thereby pushing the water plants wrapped around the surface of the blade until they are gradually tightened and then break. The water plants can also be pulled loose by a grabbing claw on a transmission belt to make the turbine rotate normally, thereby improving the accuracy of the flow meter detection data. The pressure data between the blade and the adjusting slider is detected by multiple connecting rods connected to the pressure gauge in a telescopic cavity to ensure the accuracy of the pressure data detected by the connecting rod. When it is determined that the total number of protruding or recessed connecting rods is greater than a set number, the flow meter detection data is determined to be inaccurate, thereby preventing the staff from making wrong judgments on the actual situation due to inaccurate data.

Description

Technical Field

[0001] The invention relates to flow monitoring technology, in particular to flow monitoring equipment for water conservancy projects. Background Art

[0002] Flow monitoring of water conservancy projects helps to timely detect possible flood risks and provide an important basis for flood control and drought relief work; it helps to protect river ecosystems, ensure that rivers have sufficient ecological flow and maintain ecological balance; it helps to monitor and evaluate the exploitation of groundwater resources and timely detect and prevent groundwater over-exploitation problems;

[0003] In the prior art, when the turbine flowmeter is in use, solid particles and aquatic plants are mixed in the water flow inside the water conservancy pipeline. When these substances flow with the water flow to the turbine position, the aquatic plants are likely to cause entanglement in the turbine and affect the normal rotation of the turbine. The turbine flowmeter measures the flow rate through the rotation of the turbine, and the rotation of the turbine is hindered. Solid particles are likely to collide with the blades and cause damage to the blade surface. The damaged blades are prone to imbalance and uneven rotation during rotation, making the detected flow data inaccurate.

[0004] In view of the above technical problems, this application proposes a solution. Summary of the invention

[0005] The purpose of the present invention is to drive the sleeve frame to slide on the surface of the blade by pulling the traction line during the sliding process of the sliding block sliding on the reciprocating screw, so as to push the waterweed wrapped around the surface of the blade until it is gradually tightened and then breaks. It can also be pulled loose by the grabbing claws on the transmission belt to make the turbine rotate normally, thereby improving the accuracy of the flow meter detection data. The pressure data between the blade and the adjusting slider is detected by multiple connecting rods connected to the pressure gauge in the telescopic cavity to ensure the accuracy of the pressure data detected by the connecting rod. When it is determined that the total number of protruding or recessed connecting rods is greater than the set number, the flow meter detection data is determined to be inaccurate, thereby preventing the staff from making wrong judgments on the actual situation due to inaccurate data, solving the problem that waterweed entangles the turbine and solid particles cause blade damage affecting the accuracy of the flow meter detection data, and proposing a flow monitoring device for water conservancy projects.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A flow monitoring device for a water conservancy project comprises a flow meter, water conservancy pipelines are installed at both ends of the flow meter, the flow meter comprises a support plate, a turbine and blades, support plates are installed on both sides of the inner wall of the flow meter, a turbine is rotatably connected to the support plate at the middle position inside the flow meter via a rotating shaft, a plurality of evenly distributed blades are installed on the outer wall of the turbine, a sleeve frame is slidably connected to the outer wall of the blade, a damage measurement component and an anti-blocking component are arranged on the inner side of the sleeve frame, the anti-blocking component comprises a partition plate, a through hole is opened on one side of the outer wall of the blade, a reset spring is installed at the middle position of the lower surface inside the through hole, a partition plate is integrally formed at the inner wall of the sleeve frame corresponding to the position of the through hole, lifting grooves are opened on both sides of the lower surface of the sleeve frame, and an outer baffle is slidably connected to the lifting groove.

[0008] As a preferred embodiment of the present invention, the anti-blocking component also includes a conveyor belt, and rotating rollers are installed on the lower end of the sleeve frame corresponding to the two sides of the lifting slide groove, the outer wall of the rotating roller is installed with a conveyor belt, and the outer wall of the conveyor belt is installed with a number of evenly distributed grabbing claws, and three limiting sliding bars are installed on the outer wall of the outer baffle plate close to the conveyor belt, and a slide groove is opened on the inner wall of the lifting slide groove corresponding to the position of the limiting sliding bar.

[0009] As a preferred embodiment of the present invention, a lifting spring is installed at the position of the outer baffle plate on the inner upper surface of the lifting slide, a gear is rotatably connected to the middle position of the outer side wall of the rotating roller through a rotating shaft, a lifting rack is installed at the position of the gear on the outer side wall of the outer baffle, and telescopic sleeves are installed at the positions of the lifting spring and the reset spring on the inner upper surface of the lifting slide and the inner lower surface of the through hole, respectively.

[0010] As a preferred embodiment of the present invention, an inner cavity is opened at the middle position inside the turbine, a driving gear disk is installed on the outer side wall of the rotating shaft located inside the inner cavity, and a support frame with the same number as the blades is installed on the inner side wall of the inner cavity, a reciprocating screw is rotatably connected to the support frame at a position corresponding to the driving gear disk, and a transmission gear is installed on one end of the reciprocating screw corresponding to the driving gear disk.

[0011] As a preferred embodiment of the present invention, the outer wall of the reciprocating screw is slidably connected to a sliding block, a sliding hole is opened below the outer wall of the sliding block, a limiting plate is installed at the position of the sliding hole on the outer wall of the support frame, and a connecting hole is opened at the inner wall of the turbine corresponding to the position of the support frame, a traction line is slidably connected to the inside of the connecting hole, one end of the traction line is connected to the sliding block of the shaft, and the other end is connected to the sleeve frame.

[0012] As a preferred embodiment of the present invention, the damage measurement component includes an adjusting slider, and adjusting grooves are provided on both sides of the inner wall of the sleeve frame away from the partition plate. An adjusting slider is slidably connected to the inside of the sleeve frame at a position corresponding to the adjusting groove, a telescopic spring is installed at the inner wall of the sleeve frame at a position corresponding to the adjusting slider, and a telescopic cavity is provided on the side of the adjusting slider away from the telescopic spring.

[0013] As a preferred embodiment of the present invention, a plurality of detection holes are opened on the outer surface of the adjusting slider at the position corresponding to the telescopic cavity, connecting rods are installed at the positions corresponding to the detection holes inside the telescopic cavity, connecting springs are installed at the positions corresponding to the connecting rods inside the telescopic cavity, and a pressure gauge is installed at the position corresponding to the other end of the connecting rod inside the telescopic cavity.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The rotation of the turbine drives the reciprocating screw inside the telescopic chamber to rotate, so that the sliding block sliding on the reciprocating screw slides on the blade surface through the traction line migration sleeve frame. During the sliding process, the water grass wrapped around the blade surface is pushed. As the blade gradually decreases away from the turbine position, the water grass slides inward under the push of the sleeve frame, gradually tightens and then breaks. When the outer baffle drives the rotating roller to rotate, the water grass wrapped around the turbine is pulled loose by the grabbing claws on the conveyor belt, so that the processed water grass can be driven away from the turbine and the blade position by the flowing water flow, so that the turbine rotates normally, and the accuracy of the flow meter detection data is improved;

[0016] By adjusting the slider to slide close to the blade surface under the action of the telescopic spring, impurities wrapped around the blade surface are removed, and at the same time, the pressure data between the blade and the adjusting slider is detected through multiple connecting rods connected to the pressure gauge in the telescopic cavity, and the displacement of the connecting rod is detected by the displacement sensor. While determining whether the blade surface is convex or concave based on the pressure data, it is determined based on the displacement data whether the corresponding connecting rod is stuck, thereby ensuring the accuracy of the connecting rod detection pressure data. When it is determined that the total number of connecting rods with convexity or concave is greater than the set number, the flow meter detection data is determined to be inaccurate, thereby preventing the staff from making incorrect judgments on the actual situation due to inaccurate data. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0018] Figure 1 It is the main structure diagram of the present invention;

[0019] Figure 2 It is a schematic diagram of the sleeve frame structure of the present invention;

[0020] Figure 3 For the present invention Figure 2 The upward structural diagram of

[0021] Figure 4 The turbine structure diagram of the present invention;

[0022] Figure 5 It is a structural diagram of the reciprocating screw of the present invention;

[0023] Figure 6 For the present invention Figure 1 A magnified structural diagram of part A;

[0024] In the figure: 1. water conservancy pipeline; 2. flow meter; 21. support plate; 22. turbine; 23. blade; 24. rotating shaft; 31. sleeve frame; 32. partition plate; 33. outer baffle; 34. lifting slide; 35. limit slide rod; 36. transmission belt; 37. lifting rack; 38. rotating roller; 39. inner cavity; 310. connecting hole; 311. driving gear plate; 312. reciprocating screw; 313. support frame; 314. limit plate; 315. sliding block; 316. transmission gear; 317. through hole; 41. adjusting slider; 42. adjusting slide; 43. telescopic spring. DETAILED DESCRIPTION

[0025] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] Example 1: Please refer to Figure 1-5 As shown, a flow monitoring device for water conservancy projects includes a flow meter 2, and water conservancy pipelines 1 are installed at both ends of the flow meter 2. The flow meter 2 includes a support plate 21, a turbine 22 and blades 23. The support plates 21 are installed on both sides of the inner wall of the flow meter 2. The turbine 22 is rotatably connected to the middle position of the flow meter 2 corresponding to the position of the support plate 21 through a rotating shaft 24. A plurality of evenly distributed blades 23 are installed on the outer wall of the turbine 22. The blades 23 are inclined at a certain angle, so that when water flows through the blades 23, the turbine 22 connected to the blades 23 can be driven to rotate by the driving force of the water flow;

[0027] The outer wall of the blade 23 is slidably connected with a sleeve frame 31, and the inner size of the sleeve frame 31 is consistent with the outer size of the blade 23, so that the sleeve frame 31 can be tightly sleeved on the outer side of the blade 23, and a damage detection component and an anti-blocking component are arranged on the inner side of the sleeve frame 31, and the anti-blocking component includes a partition plate 32, and the partition plate 32 is clamped on the inner side of the through hole 317, so that the sleeve frame 31 will not tilt at an angle when sliding up and down. A through hole 317 is opened on one side of the outer wall of the blade 23, and a return spring is installed at the middle position of the lower surface of the through hole 317, so that the sleeve frame 31 can be reset by the compressed return spring after being pressed down, and the inner wall of the sleeve frame 31 is integrally formed with a The partition plate 32 and the lower surface of the sleeve frame 31 are provided with lifting chutes 34 on both sides. The lower end of the sleeve frame 31 is provided with an engaging groove at the position corresponding to the lifting chute 34. The shape of the engaging groove is consistent with the shape of the outer side of the turbine 22, so that the sleeve frame 31 can fit tightly with the surface of the turbine 22 after sliding down to the bottom. The lifting chute 34 is slidably connected with an outer baffle plate 33. The lower end of the sleeve frame 31 is provided with rotating rollers 38 on both sides corresponding to the lifting chute 34. The outer side wall of the rotating roller 38 is provided with a conveyor belt 36. The outer side wall of the conveyor belt 36 is provided with a number of evenly distributed grabbing claws. When the conveyor belt 36 moves, it drives the grabbing claw to move its position, removes the residue on the surface of the turbine 22 and the blade 23, and prevents the residue from affecting For the normal rotation of the turbine 22, three limit slide bars 35 are installed on the side of the outer wall of the outer baffle plate 33 close to the conveyor belt 36, a slide bar is provided at the position of the limit slide bar 35 on the inner wall of the lifting slide 34, a lifting spring is installed at the position of the outer baffle plate 33 on the inner upper surface of the lifting slide 34, a gear is connected to the rotating roller 38 at the middle position of the outer wall of the rotating roller 38 through a rotating shaft, a lifting rack 37 is installed at the position of the gear on the outer wall of the outer baffle plate 33, and the lifting rack 37 and the gear are engaged with each other. When the outer baffle plate 33 moves up and down, the gear is driven to rotate, so that the rotating roller 38 coaxial with the gear rotates synchronously, and the inner upper surface of the lifting slide 34 and the inner lower surface of the through hole 317 correspond to the positions of the lifting spring and the reset spring respectively. A telescopic sleeve is installed, and the setting of the telescopic sleeve prevents the lifting spring and the return spring inside from contacting the external water flow. An inner cavity 39 is opened in the middle position inside the turbine 22, and a driving toothed disc 311 is installed on the outer wall of the rotating shaft 24 inside the inner cavity 39. The driving toothed disc 311 and the transmission gear 316 are on the same plane. When the turbine 22 rotates, the support frame 313 connected to the transmission gear 316 is driven to rotate, so that the transmission gear 316 and the driving toothed disc 311 rotate, and the reciprocating screw 312 connected to the transmission gear 316 rotates. The inner wall of the inner cavity 39 is equipped with the same number of support frames 313 as the blades 23, and the reciprocating screw 312 is rotatably connected to the position of the support frame 313 corresponding to the driving toothed disc 311.A transmission gear 316 is installed at one end of the reciprocating screw 312 corresponding to the driving toothed disc 311, and a sliding block 315 is slidably connected to the outer wall of the reciprocating screw 312. When the reciprocating screw 312 rotates, the sliding block 315 reciprocates and slides back and forth on the outer side of the reciprocating screw 312 and is restricted by the limit plate 314. A sliding hole is opened at the lower side of the outer wall of the sliding block 315, and a limit plate 314 is installed at the position of the sliding hole corresponding to the outer wall of the support frame 313. A connecting hole 310 is opened at the position of the support frame 313 corresponding to the inner wall of the turbine 22. A traction line is slidably connected to the inner side of the connecting hole 310. One end of the traction line is connected to the shaft sliding block 315, and the other end is connected to the sleeve frame 31, so that when the sliding block 315 changes its position, the sleeve frame 31 can be driven by the traction line to slide on the outer side of the blade 23;

[0028] In the prior art, when the turbine flowmeter is in use, solid particles and aquatic plants are mixed in the water flow inside the water conservancy pipeline. When these substances flow with the water flow to the position of the turbine 22, the aquatic plants are easy to cause entanglement with the turbine 22 and affect the normal rotation of the turbine 22. The turbine flowmeter measures the flow rate through the rotation of the turbine 22, and the rotation of the turbine 22 is hindered, so that the detected flow data is inaccurate.

[0029] A crushing structure is provided in front of the water conservancy pipeline 1 near the flow meter 2 to crush larger impurities in the water flow inside the water conservancy pipeline 1. The crushed impurities reach the flow meter 2 with the flow of water. The crushed impurities are smaller in size. When passing through the turbine 22, some of the chopped water plants are still easy to hang on the surface of the blades 23 to hinder the rotation of the blades 23. When the turbine 22 rotates driven by the water flow, it drives the support frame 313 connected to the inner wall of the turbine 22 to rotate. The transmission gear 316 installed at one end of the reciprocating screw 312 on the support frame 313 interacts with the driving gear plate 311 when the turbine 22 rotates, so that the reciprocating screw 312 starts to rotate. The sliding block 315 can only slide in the horizontal direction under the restriction of the limit plate 314, and when the sliding block 315 slides on the reciprocating screw 312, it drives the sleeve frame 31 at the same position on the outside of the turbine 22 to rotate on the blades through the traction line. When the outer baffle plate 33 is in contact with the surface of the turbine 22, the outer baffle plate 33 is further moved downwardly by the sleeve frame 31, which will cause the outer baffle plate 33 to contract toward the inner side of the lifting slot 34. When the outer baffle plate 33 contracts, the lifting rack 37 connected to the outer baffle plate 33 drives the gear engaged with the lifting rack 37 to rotate, so that the rotating roller 38 coaxial with the gear drives the grabbing claw on the transmission belt 36 to move. When the grabbing claw moves, the water grass wrapped around the outer side of the turbine 22 and the blade 23 is pulled, and the loosened water grass leaves the position of the turbine 22 and the blade 23 driven by the water flow. When the sleeve frame 31 is reset, the lifting rack 37 drives the rotating roller 38 to rotate in the opposite direction, so that the grabbing claw pushes the water grass in the opposite direction, which can also loosen the wrapped water grass.

[0030] Example 2: Please refer to Figure 2 As shown, the damage measurement component includes an adjusting slider 41, and adjusting slots 42 are provided on both sides of the inner wall of the sleeve frame 31 away from the partition plate 32. The adjusting slider 41 is slidably connected at the position corresponding to the adjusting slot 42 inside the sleeve frame 31, and a telescopic spring 43 is installed at the inner wall of the sleeve frame 31 corresponding to the position of the adjusting slider 41. A telescopic cavity is provided on the side of the adjusting slider 41 away from the telescopic spring 43, and a plurality of detection holes are provided on the outer surface of the adjusting slider 41 corresponding to the position of the telescopic cavity. Connecting rods are installed at the positions corresponding to the detection holes inside the telescopic cavity, and connecting springs are installed at the positions corresponding to the connecting rods inside the telescopic cavity. The connecting spring is sleeved on the outer wall of the connecting rod, one end of which is connected to one end of the connecting rod, and the other end is connected to the inner wall of the telescopic cavity. A pressure gauge is installed at the position corresponding to the other end of the connecting rod inside the telescopic cavity, and an energized spring is installed at the rear end of the pressure gauge mounting plate through a waterproof sleeve. Because one side of the adjusting slider 41 is at the same inclination angle as the surface of the blade 23, the plane formed by the connecting rod exposed from the telescopic cavity to the outside is also inclined.

[0031] In the prior art, when a turbine flowmeter is in use, since solid particles, waterweeds, etc. are mixed in the water flow inside the water conservancy pipeline, when these substances flow to the position of the turbine 22 along with the water flow, the solid particles are likely to impact the blade 23, causing damage to the surface of the blade 23. When the damaged blade 23 rotates, it is prone to imbalance and uneven rotation, making the detected flow data inaccurate as well;

[0032] When the sleeved frame 31 slides on the surface of the blade 23, several connecting rods on the inclined surface of the adjusting slider 41 are in close contact with the inclined surface of the blade 23. When the sleeved frame 31 displaces, the pressure gauge connected to one end of the connecting rod can detect the pressure data between the connecting rod and the surface of the blade 23. When the adjusting slider 41 slides, it is mutually extruded with the surface of the blade 23 under the action of the telescopic spring 43, so that during the sliding process of the adjusting slider 41, some attachments on the surface of the blade 23 can be removed, making the detected pressure data more accurate and more representative of the pressure data between the connecting rod and the surface of the blade 23. The pressure data between the connecting rod and the surface of the blade 23 is set as YP, and the detected pressure data is JP. If YP>JP, it is determined that the surface of the blade 23 is sunken, and the size of the sunken area is represented by the number S of the connecting rods adjacent to this connecting rod and whose detection results also show YP>JP; if YP<JP, it is determined that the surface of the blade 23 is convex, and the size of the convex area is also represented by the number S of the connecting rods; when the connecting rod moves in position, the displacement data of the connecting rod is detected at the same time. The displacement data WY of the connecting rod when it is idle, and the detected displacement data is JY. If WY>JY, it is determined that the surface of the blade 23 is convex; if WY<JY, it is determined that the surface of the blade 23 is sunken; if the detected displacement data JY does not change within the set time, it is determined that the connecting rod may be stuck, a test signal is generated, and the test signal is transmitted to the control system. The control system cuts off the power supply of the energized spring connecting the pressure gauge mounting plate, so that the energized spring after power-off generates a pushing force on the pressure gauge mounting plate. If the detected displacement data JY still does not change, it is determined that the connecting rod is stuck, and the pressure data collected by this connecting rod is not recorded.

[0033] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not elaborate on all the details, nor do they limit the present invention to only the specific implementation manners. Obviously, according to the content of this specification, many modifications and changes can be made. This specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the present invention, so that those skilled in the art in the relevant technical field can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A flow monitoring device for a water conservancy project, comprising a flow meter (2), wherein both ends of the flow meter (2) are provided with a water conservancy pipeline (1), the flow meter (2) comprising a support plate (21), a turbine (22) and blades (23), the support plates (21) being provided on both sides of the inner wall of the flow meter (2), a turbine (22) being rotatably connected to a position of the support plate (21) at a middle position inside the flow meter (2) corresponding to a position of the support plate (21) via a rotating shaft (24), and a plurality of evenly distributed blades (23) being provided on the outer wall of the turbine (22), It is characterized in that The outer wall of the blade (23) is slidably connected to a sleeve frame (31), and a damage detection component and an anti-blocking component are arranged inside the sleeve frame (31). The anti-blocking component includes a partition plate (32). A through hole (317) is opened on one side of the outer wall of the blade (23), and a return spring is installed at the middle position of the lower surface inside the through hole (317). The inner wall of the sleeve frame (31) is integrally formed with a partition plate (32) at the position corresponding to the through hole (317). Lifting slide grooves (34) are opened on both sides of the lower surface of the sleeve frame (31), and an outer baffle plate (33) is slidably connected inside the lifting slide groove (34); An inner cavity (39) is provided at a middle position inside the turbine (22); a driving toothed disc (311) is installed on the outer side wall of the rotating shaft (24) inside the inner cavity (39); a supporting frame (313) having the same number as the blades (23) is installed on the inner side wall of the inner cavity (39); a reciprocating screw (312) is rotatably connected to a position of the supporting frame (313) corresponding to the driving toothed disc (311); and a transmission gear (316) is installed at one end of the reciprocating screw (312) corresponding to the driving toothed disc (311); The outer wall of the reciprocating screw (312) is slidably connected to a sliding block (315), a sliding hole is provided below the outer wall of the sliding block (315), a limiting plate (314) is installed at the position of the outer wall of the support frame (313) corresponding to the sliding hole, and a connecting hole (310) is provided at the inner wall of the turbine (22) corresponding to the position of the support frame (313), a traction line is slidably connected inside the connecting hole (310), one end of the traction line is connected to the sliding block (315) and the other end is connected to the sleeve frame (31); The anti-blocking component also includes a conveyor belt (36), a rotating roller (38) is installed on the lower end of the sleeve frame (31) corresponding to the two sides of the lifting slide groove (34), the outer wall of the rotating roller (38) is installed with a conveyor belt (36), the outer wall of the conveyor belt (36) is installed with a plurality of evenly distributed grabbing claws, the outer wall of the outer baffle plate (33) is installed with three limiting slide bars (35) on the side close to the conveyor belt (36), and the inner wall of the lifting slide groove (34) is provided with a slide groove corresponding to the position of the limiting slide bar (35); A lifting spring is installed at a position on the inner upper surface of the lifting slot (34) corresponding to the position of the outer baffle plate (33); a gear is rotatably connected to the middle position of the outer side wall of the rotating roller (38) via a rotating shaft; a lifting rack (37) is installed at a position on the outer side wall of the outer baffle plate (33) corresponding to the gear position; and telescopic sleeves are installed at the inner upper surface of the lifting slot (34) and the inner lower surface of the through hole (317) corresponding to the positions of the lifting spring and the reset spring, respectively.

2. A flow monitoring device for water conservancy projects according to claim 1, It is characterized in that The damage measurement component includes an adjusting slider (41), and adjusting grooves (42) are provided on both sides of the inner wall of the sleeve frame (31) away from the partition plate (32). The sleeve frame (31) is slidably connected with the adjusting slider (41) at a position corresponding to the adjusting groove (42), and a telescopic spring (43) is installed at a position of the inner wall of the sleeve frame (31) corresponding to the adjusting slider (41), and a telescopic cavity is provided on the side of the adjusting slider (41) away from the telescopic spring (43).

3. A flow monitoring device for water conservancy projects according to claim 2, It is characterized in that The outer surface of the adjusting slider (41) is provided with a plurality of detection holes at positions corresponding to the telescopic cavity, connecting rods are installed at positions corresponding to the detection holes inside the telescopic cavity, connecting springs are installed at positions corresponding to the connecting rods inside the telescopic cavity, and a pressure gauge is installed at a position corresponding to the other end of the connecting rod inside the telescopic cavity.

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