A pipe joint and detection method for convenient detection of sealing and water pressure

Abstract

The present invention relates to the field of pipeline technology, and specifically to a pipe joint and a detection method that are convenient for detecting sealing and water pressure, comprising: a pipe joint body, an annular cylinder is fixedly arranged in the middle of the pipe joint body, and a detection chamber 2 is opened on one side of the connecting chamber 1; a sliding ring 1 and a sliding ring 2 are respectively arranged on both sides of the fixed ring, and pressure sensors are fixed on both side surfaces of the fixed ring; a reflective convex plate is fixed on the surface of the rotating ring, and an arc-shaped groove is opened on the surface of the reflective convex plate, and the bottom of the arc-shaped groove is coated with a reflective coating; the beneficial effect is: by arranging a pressure difference detector in the inner cavity of the detection chamber 1, the pressure difference between the inside and outside of the annular cylinder is detected, and a pressure detector is arranged in the inner cavity of the detection chamber 2 for detecting the pressure in the inner cavity of the connecting chamber 1, thereby ensuring that the device can detect the surrounding pressure and the pressure difference between the inside and outside of the annular cylinder in real time, avoiding the pipe joint body from being ruptured and damaged due to excessive seabed water pressure and excessive pressure difference between the inside and outside of the annular cylinder, thereby affecting use.

Description

Technical Field

[0001] The present invention relates to the technical field of pipelines, in particular to a pipe joint and a detection method for facilitating detection of sealing and water pressure. Background Art

[0002] Pipeline joints are mainly used in marine water quality detection for data transmission, sample collection, equipment protection, and environmental adaptability connections, such as:

[0003] ① Multi-parameter water quality sensors (such as dissolved oxygen and pH probes) are connected to the hull through quick-release pipe joints, which are easy to maintain and replace. The pipe joints have built-in waterproof connectors to ensure stable data transmission.

[0004] ② The unmanned boat automatically collects water samples through a built-in pipe system;

[0005] ③ In concealed pipe detection, the relevant sensors need to be protected by waterproof pipes or cavities;

[0006] ④ In some scenarios, the detection ship is connected to the sonar probe through a flexible pipe to ensure the stability of the equipment in turbulent water environments; etc.

[0007] In the prior art, a Chinese invention with publication number CN115126933A discloses a sealing device between pipe sections and a method for using the sealing device, which solves the problem of preventing water from entering between pipe sections of large and extra-large cross-sections of jacking pipes, and effectively enhances the leak-proof effect of the joints between pipe sections of jacking pipes.

[0008] Currently, as pipeline joints penetrate deeper into the seabed, the hydraulic pressure and pressure differential inside and outside the joint gradually increase. Failure to promptly monitor the hydraulic pressure and pressure differential around the joint can easily lead to cracking and damage of the joint under the action of the hydraulic pressure, thus affecting its usability. To address this issue, the present invention proposes a pipe joint and a method for easily testing its sealing and water pressure to address this issue. Summary of the Invention

[0009] The object of the present invention is to provide a pipe joint and a detection method that are convenient for detecting the sealing performance and water pressure, so as to solve the problems raised in the above-mentioned background technology.

[0010] To achieve the above-mentioned object, the present invention provides the following technical solution: a pipe joint that is convenient for detecting sealing and water pressure, comprising:

[0011] A pipe segment body, wherein an annular cylinder is fixedly provided in the middle of the pipe segment body, a detection chamber 1 is opened inside the side wall of the annular cylinder, a connecting chamber 1 and a connecting chamber 2 are respectively opened on both sides of the detection chamber 1, and the connecting chamber 1 and the connecting chamber 2 are respectively connected to the inner and outer sides of the annular cylinder, and a detection chamber 2 is opened on one side of the connecting chamber 1;

[0012] The inner cavity of the detection cavity 1 is equipped with a pressure difference detector, and the inner cavity of the detection cavity 2 is equipped with a pressure detector for measuring the pressure of the inner cavity of the communication cavity 1;

[0013] The differential pressure detector comprises a fixed ring, a sliding ring 1 and a sliding ring 2 are respectively provided on both sides of the fixed ring, and pressure sensors are fixed on both sides of the fixed ring;

[0014] The pressure detector includes a rotatable rotating ring, a reflective convex plate is fixed on the surface of the rotating ring, an arc-shaped groove is opened on the surface of the reflective convex plate, and the bottom of the arc-shaped groove is coated with a reflective coating. An emitter and a receiving plate are installed on the inner wall of one side of the detection cavity 2. The light emitted by the emitter is reflected by the reflective coating and then received by the receiving plate.

[0015] Preferably, the fixed ring is located in the middle of the inner cavity of the detection chamber and is fixedly connected to the annular cylinder. A plurality of guide holes distributed in a circular array are opened through the surface of the fixed ring. A connecting column is movably provided through the inner cavity of the guide hole, and the two ends of the connecting column are respectively fixedly connected to the sliding ring one and the sliding ring two.

[0016] Preferably, a pad is fixed on the surface of the pressure sensor, a compression spring is fixed on the surface of the pad, one end of the two compression springs rests on the surfaces of the sliding ring 1 and the sliding ring 2 respectively, and the compression springs are in a compressed state.

[0017] Preferably, the connecting points between the communicating chamber 1 and the detection chamber 1, the connecting points between the communicating chamber 2 and the detection chamber 1, and the connecting points between the detection chamber 2 and the communicating chamber 1 are all provided with flexible sealing layers, the flexible sealing layers are annular and made of elastically deformable silicone material, the inner and outer edges of the flexible sealing layers are fixedly connected with limit stop rings, and the limit stop rings are fixedly connected to the annular cylinder.

[0018] Preferably, a driving slip ring is provided on one side of the rotating ring, and a gap is left between the two. A driving wedge and a driven wedge are fixedly connected to the side surfaces of the driving slip ring and the rotating ring that are close to each other. There are multiple driving wedges and driven wedges, and they are distributed in an annular array. The driving slip ring slides along the axial direction of the annular cylinder and drives the rotating ring to rotate by the mutual squeezing of the driving wedge and the driven wedge.

[0019] Preferably, a notch groove is provided at the edge of the driving slip ring, a limiting boss corresponding to the notch groove is fixed on the inner wall of the detection chamber 2, a guide seat is fixed on the surface of the rotating ring, a guide groove is provided on the outer wall of the guide seat, an arc-shaped guide plate is fixed on the inner wall of the detection chamber 2, and the arc-shaped guide plate is slidably connected to the guide groove.

[0020] Preferably, the arc guide plate is C-shaped and fixedly connected to a fixed stopper at one end, a reset spring is fixed between the fixed stopper and the reflective convex plate, and the central angle of the reflective convex plate is smaller than the central angle of the notch of the arc guide plate.

[0021] Preferably, the pipe segment body is a metal hose, which is provided with two sections and is respectively fixed at the two ends of the annular cylinder. The wall thickness of the annular cylinder is greater than the wall thickness of the pipe segment body, and the inner cavities of the two are connected. A control valve is provided at the end of the pipe segment body away from the annular cylinder, and a cable protective sleeve for threading cables is provided on the outside of the pipe segment body.

[0022] Preferably, both inner and outer side walls of the annular cylinder are provided with through holes, and the two through holes are connected to the inner cavity of the communicating cavity 1 and the inner cavity of the communicating cavity 2 respectively.

[0023] A method for detecting a pipe joint for detecting sealing and water pressure according to the above-mentioned method specifically comprises the following steps:

[0024] Step 1: The media on the inner and outer sides of the annular cylinder enter the communicating chamber 1 and the communicating chamber 2 respectively. The media squeezes the flexible sealing layer to deform and applies different pressures to the surfaces of the sliding ring 1 and the sliding ring 2 respectively. The sliding ring 1 and the sliding ring 2 slide synchronously and in the same direction under the action of the pressure difference. At this time, the compression amount of the compression springs on both sides of the fixed ring changes, the compression amount of one compression spring increases, and the compression amount of the other compression spring decreases. The two pressure sensors detect different readings and transmit the data to the external controller for processing, so that the pressure difference between the inside and outside of the annular cylinder can be detected;

[0025] Step 2: After the medium on the outside of the annular cylinder enters the inner cavity of the connecting cavity 1, it will also squeeze the driving slip ring in the inner cavity of the detection cavity 2. At this time, the driving slip ring slides and drives the rotating ring to rotate through the squeezing between the driving wedge and the driven wedge. When the rotating ring rotates, the position of the light emitted by the transmitter on the reflective coating changes. Since the reflective coating itself is curved, the reflection angle of the reflective coating to the light changes. After the light is received by the receiving board and the data is transmitted to the external controller, the pressure of the medium outside the annular cylinder can be detected.

[0026] Step 3: Combining the data detected in Step 1 and Step 2 above, the pressure of the medium in the inner cavity of the annular cylinder can be calculated by simple addition and subtraction;

[0027] Step 4. Close the control valves at both ends of the pipe joint body and record the initial pressure difference between the inside and outside of the annular cylinder. After a period of time, record the pressure difference between the inside and outside of the annular cylinder again and compare the two data. If there is no sealing problem between the pipe joint body and the annular cylinder itself, the two pressure differential data will be the same. If there is a sealing problem between the pipe joint body and the annular cylinder itself, the two pressure differential data will be different, and the pressure differential data recorded again will be close to zero.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] The present invention has a detection chamber 1 opened inside the side wall of the annular cylinder, and a connecting chamber 1 and a connecting chamber 2 are respectively opened on both sides of the detection chamber 1, and the connecting chamber 1 and the connecting chamber 2 are connected to the inner cavity of the annular cylinder and the outer side of the annular cylinder respectively. A pressure difference detector is provided in the inner cavity of the detection chamber 1, which can be used to detect the pressure difference between the inner cavities of the connecting chamber 1 and the connecting chamber 2, thereby detecting the pressure difference between the inside and outside of the annular cylinder. A detection chamber 2 is opened on one side of the connecting chamber 1, and a pressure detector is provided in the inner cavity of the detection chamber 2 for detecting the pressure of the inner cavity of the connecting chamber 1, thereby ensuring that the present device can detect the surrounding pressure and the pressure difference between the inside and outside of the annular cylinder in real time, avoiding rupture and damage of the pipe segment body due to excessive seabed water pressure and excessive pressure difference between the inside and outside of the annular cylinder, thereby affecting use. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the present invention;

[0031] Figure 2 This is a schematic diagram of the interior of the annular cylinder structure of the present invention;

[0032] Figure 3 This is a schematic cross-sectional view of the annular cylinder structure of the present invention;

[0033] Figure 4 This is a schematic cross-sectional view of an annular cylinder structure in another embodiment of the present invention;

[0034] Figure 5 For the present invention Figure 4 A schematic diagram of the structure at center A;

[0035] Figure 6 This is a schematic diagram of the structure of the differential pressure detector of the present invention;

[0036] Figure 7 This is a schematic diagram of the structure of the pressure detector of the present invention;

[0037] Figure 8 This is a three-dimensional schematic diagram of the drive slip ring structure of the present invention;

[0038] Figure 9 This is a three-dimensional schematic diagram of the rotating ring structure of the present invention;

[0039] Figure 10 It is a partial three-dimensional schematic diagram of the annular cylinder structure of the present invention.

[0040] In the figure: 1. Pipe segment body; 2. Annular cylinder; 21. Detection chamber 1; 22. Connecting chamber 1; 23. Connecting chamber 2; 24. Detection chamber 2; 241. Transmitter; 242. Receiving plate; 243. Position limiting boss; 25. Flexible sealing layer; 26. Position limiting ring; 3. Differential pressure detector; 31. Fixed ring; 311. Guide hole; 32. Sliding ring 1; 33. Sliding ring 2; 34. Connecting column; 35. Compression spring; 36 , pressure sensor; 37, pad; 4, pressure detector; 41, driving slip ring; 411, driving wedge; 412, notch groove; 42, rotating ring; 421, driven wedge; 422, reflective convex plate; 423, return spring; 424, arc-shaped groove; 425, reflective coating; 426, guide seat; 427, guide slide; 43, arc-shaped guide plate; 431, fixed block; 5, through hole; 6, cable protective cover. DETAILED DESCRIPTION

[0041] In order to clearly and completely describe the objectives and technical solutions of the present invention and make the advantages more clearly understood, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, not all of them, and are only used to explain the embodiments of the present invention, not to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0042] See also Figures 1 to 10 , the present invention provides a technical solution:

[0043] A pipe joint convenient for detecting sealing performance and water pressure comprises a pipe joint body 1.

[0044] Specifically, an annular cylinder 2 is fixedly provided in the middle of the pipe segment body 1. The pipe segment body 1 is a metal hose. The pipe segment body 1 itself can be bent to a certain extent for easy installation and connection. The pipe segment body 1 is provided with two sections, which are respectively fixed at both ends of the annular cylinder 2. A control valve is provided at the end of the pipe segment body 1 away from the annular cylinder 2. By opening and closing the control valve, the internal connection of the pipe segment can be disconnected from the outside world for easy sealing detection. A detection chamber 1 21 is provided inside the side wall of the annular cylinder 2. A connecting chamber 1 22 and a connecting chamber 2 23 are respectively provided on both sides of the detection chamber 1 21, and the connecting chamber 1 22 and the connecting chamber 2 23 are respectively connected to the inner and outer sides of the annular cylinder 2. Through holes 5 are provided on the inner and outer side walls of the annular cylinder 2. The two through holes 5 are respectively connected to the inner cavity of the connecting chamber 1 22 and the inner cavity of the connecting chamber 2 23;

[0045] Example 1, as Figure 3As shown, the inner cavity of the annular cylinder 2 is connected to the second communicating cavity 23 via a through hole 5, and the outer cavity of the annular cylinder 2 is connected to the first communicating cavity 22 via another through hole 5. A second detecting cavity 24 is provided on one side of the first communicating cavity 22. A differential pressure detector 3 is installed in the inner cavity of the first detecting cavity 21 for detecting the pressure difference between the first communicating cavity 22 and the second communicating cavity 23, thereby detecting the pressure difference between the inside and outside of the annular cylinder 2. A pressure detector 4 for measuring the pressure of the inner cavity of the first communicating cavity 22 is installed in the inner cavity of the second detecting cavity 24, thereby being able to detect the pressure of the medium outside the annular cylinder 2.

[0046] Example 2: According to actual needs, the positions of the two through holes 5 of this application can also be as follows: Figure 4 As shown in the distribution, the inner cavity of the annular cylinder 2 is connected to the communication cavity 1 22 through a through hole 5, and the outer side of the annular cylinder 2 is connected to the communication cavity 2 23 through another through hole 5. Figure 3 and Figure 4 As shown, by changing the position distribution of the through holes 5, the pressure detector 4 can detect the pressure of the medium outside the annular cylinder 2 or the pressure of the medium inside the annular cylinder 2. However, no matter how the through holes 5 are distributed, the pressure difference detector 3 can always detect the pressure difference between the inside and outside of the annular cylinder 2.

[0047] Secondly, the differential pressure detector 3 includes a fixed ring 31, and a sliding ring 1 32 and a sliding ring 2 33 are respectively provided on both sides of the fixed ring 31. Pressure sensors 36 are fixed on both sides of the fixed ring 31. The sliding ring 1 32 and the sliding ring 2 33 can move closer to or away from the fixed ring 31. Figure 3 and Figure 6 As shown, the medium in the inner cavity of the communicating chamber 1 22 will exert an extrusion pressure on the sliding ring 2 33, and the medium in the inner cavity of the communicating chamber 2 23 will exert an extrusion pressure on the sliding ring 1 32, thereby pushing the sliding ring 1 32 and the sliding ring 2 33 to move, and then exerting pressure on the pressure sensor 36. By detecting the pressure exerted by the sliding ring 1 32 and the sliding ring 2 33 on them respectively by the two pressure sensors 36, the pressure difference between the sliding ring 1 32 and the sliding ring 2 33 can be calculated, that is, the pressure difference between the communicating chamber 1 22 and the communicating chamber 2 23, that is, the pressure difference between the inside and outside of the annular cylinder 2;

[0048] Furthermore, the pressure detector 4 includes a rotatable rotating ring 42, which can only rotate in the inner cavity of the detection chamber 24 without position displacement. A reflective convex plate 422 is fixed to the surface of the rotating ring 42, and an arc-shaped groove 424 is opened on the surface of the reflective convex plate 422, and the bottom of the arc-shaped groove 424 is coated with a reflective coating 425. An emitter 241 and a receiving plate 242 are installed on the inner wall of one side of the detection chamber 24. The light emitted by the emitter 241 is reflected by the reflective coating 425 and received by the receiving plate 242. The medium in the inner cavity of the detection chamber 24 is pushed under the action of pressure. The rotating ring 42 rotates. Since the emitter 241 is fixed in position, the contact point between the light emitted by the emitter 241 and the reflective coating 425 changes as the rotating ring 42 rotates. Since the reflective coating 425 is curved, the reflection angle of the light by the reflective coating 425 gradually increases as the rotating ring 42 rotates. Based on the change in the position of the light received by the receiving plate 242, the rotation angle of the rotating ring 42 can be detected, and the pressure exerted on the rotating ring 42 by the medium in the second detection chamber 24 can be determined, that is, the pressure of the matrix in the second detection chamber 24.

[0049] In summary, the present application can detect the pressure difference between the inside and outside of the annular cylinder 2, and can also detect the pressure of the medium in the inner cavity of the annular cylinder 2 or the pressure of the medium outside the annular cylinder 2 separately. In addition, by closing the control valves at both ends of the pipe segment body 1, the pressure difference detected by the pressure differential detector 3 is recorded twice at two different time nodes within a certain period of time. By comparing whether the size of the pressure difference has changed, it can be known whether the inner cavity of the pipe segment body 1 and the annular cylinder 2 remain sealed. Specifically: when the pressure differential data detected by the two pressure differential detectors 3 are the same, the sealing of the inner cavity of the pipe segment body 1 and the annular cylinder 2 is good. If the two pressure differential data are different, the sealing of the inner cavity of the pipe segment body 1 and the annular cylinder 2 is poor, and the greater the difference between the two pressure differential data, the worse the sealing of the inner cavity of the pipe segment body 1 and the annular cylinder 2.

[0050] In order to ensure that the sliding ring 1 32 and the sliding ring 2 33 slide synchronously in the same direction, the fixed ring 31 of the present application is located in the middle of the inner cavity of the detection cavity 1 21 and is fixedly connected to the annular cylinder 2. A plurality of guide holes 311 distributed in an annular array are opened on the surface of the fixed ring 31. A connecting column 34 is movably provided through the inner cavity of the guide hole 311, and the two ends of the connecting column 34 are fixedly connected to the sliding ring 1 32 and the sliding ring 2 33 respectively. Figure 6As shown, the connecting column 34 can only slide along its own length direction and ensure that the sliding ring 1 32 and the sliding ring 2 33 maintain synchronous sliding in the same direction. When the medium pressures in the connecting cavity 1 22 and the connecting cavity 2 23 are different, the sliding ring 1 32 and the sliding ring 2 33 will inevitably slide a certain distance along the length direction of the connecting column 34, so that the pressure exerted on the two pressure sensors 36 will change accordingly, so as to facilitate the detection of the pressure exerted by the medium on the sliding ring 1 32 and the sliding ring 2 33.

[0051] In order to ensure that the sliding ring 1 32 and the sliding ring 2 33 can still apply pressure to the pressure sensor 36 after they are displaced, the present application also has a pad 37 fixed on the surface of the pressure sensor 36, and a compression spring 35 fixed on the surface of the pad 37. One end of the two compression springs 35 is respectively against the surface of the sliding ring 1 32 and the sliding ring 2 33, and the compression spring 35 is in a compressed state. Since the compression spring 35 is always in a compressed state, even if the sliding ring 1 32 and the sliding ring 2 33 are displaced, the compression spring 35 can still apply a certain pressure to the pressure sensor 36. It’s just that as the sliding ring 1 32 and the sliding ring 2 33 are displaced, the pressure exerted on the pressure sensor 36 by the compression spring 35 is different.

[0052] In order to limit the sliding of the sliding ring 1 32 and the sliding ring 2 33, the present application also has a flexible sealing layer 25 provided at the connection between the connecting chamber 1 22 and the detection chamber 1 21, the connection between the connecting chamber 23 and the detection chamber 1 21, and the connection between the detection chamber 24 and the connecting chamber 1 22, so as to ensure that the inner cavities of the detection chamber 1 21, the connecting chamber 1 22, the connecting chamber 23 and the detection chamber 2 24 are independent of each other, and the internal medium will not leak, thereby avoiding the mutual blending of the media inside and outside the annular cylinder 2, and the flexible sealing layer 25 is provided at the connection between the connecting chamber 1 22 and the detection chamber 1 21 ...1, the connecting chamber 1 22, the connecting chamber 23 and the detection chamber 2 24, and the flexible sealing layer 25 is provided at the connection between the connecting chamber 1 The sealing layer 25 is annular and is made of elastically deformable silicone material. The inner and outer edges of the flexible sealing layer 25 are fixedly connected to limit rings 26, which are fixedly connected to the annular tube 2. The setting of the limit ring 26 can be used to install and position the flexible sealing layer 25 on the one hand, and on the other hand, it can also limit the sliding stroke of the sliding ring 1 32 and the sliding ring 2 33 to prevent the sliding ring 1 32 and the sliding ring 2 33 from squeezing the flexible sealing layer 25 when sliding, thereby causing the flexible sealing layer 25 to be crushed.

[0053] In order to drive the rotating ring 42 to rotate, the present application also has a driving slip ring 41 provided on one side of the rotating ring 42, and a gap is left between the two. The driving slip ring 41 and the rotating ring 42 are respectively fixedly connected to the side surface close to each other with a driving wedge 411 and a driven wedge 421. There are multiple driving wedges 411 and driven wedges 421, and they are distributed in an annular array. The driving slip ring 41 slides along the axial direction of the annular cylinder 2 and drives the rotating ring 42 to rotate by the mutual squeezing of the driving wedge 411 and the driven wedge 421. Figure 7 and Figure 3 As shown, the medium in the connecting cavity 22 squeezes the flexible sealing layer 25 and deforms it, which generates an extrusion force on the driving slip ring 41 and pushes the driving slip ring 41 to slide along the length direction of the annular cylinder 2. At this time, the driving wedge 411 generates an extrusion force on the driven wedge 421 and drives the rotating ring 42 to rotate, and the rotation angle of the rotating ring 42 is proportional to the sliding distance of the driving slip ring 41.

[0054] In order to prevent the rotating ring 42 from sliding, the present application also has a notch groove 412 at the edge of the driving slip ring 41, and the inner wall of the detection chamber 24 is fixed with a limiting boss 243 corresponding to the notch groove 412. The mutual cooperation between the limiting boss 243 and the notch groove 412 is used to guide the sliding of the driving slip ring 41, ensuring that the driving slip ring 41 can only slide along the length direction of the annular cylinder 2 and will not rotate itself. A guide seat 426 is fixed on the surface of the rotating ring 42, and a guide groove 427 is provided on the outer wall of the guide seat 426. An arc-shaped guide plate 43 is fixed on the inner wall of the detection chamber 24, and the arc-shaped guide plate 43 is slidably connected to the guide groove 427. The mutual cooperation between the arc-shaped guide plate 43 and the guide groove 427 is used to limit and guide the rotating ring 42, ensuring that the rotating ring 42 can only rotate and will not slide along the length direction of the annular cylinder 2.

[0055] In order to detect the pressure of the medium in the connecting cavity 22, the arc guide plate 43 of the present application is in a "C" shape, and one end is fixedly connected to a fixed stopper 431, and a return spring 423 is fixed between the fixed stopper 431 and the reflective convex plate 422. Figure 9As shown, when the rotating ring 42 rotates, the return spring 423 will be compressed to offset the extrusion force exerted on the driven wedge 421. That is to say, the greater the medium pressure in the connecting chamber 22, the greater the rotation angle of the rotating ring 42, and the two are positively correlated. Based on the different rotation angles of the rotating ring 42, the irradiation position of the reflected light received by the receiving plate 242 is also different. By detecting the irradiation point of the reflected light by the receiving plate 242, the rotation angle of the rotating ring 42 can be calculated, and then the medium pressure in the connecting chamber 22 can be known. In addition, in combination with the above-mentioned embodiment 2, it can be seen that the setting position of the through hole 5 is changed according to actual needs. The pressure detector 4 of this device can separately detect the medium pressure in the inner cavity of the annular cylinder 2 or the medium pressure outside the annular cylinder 2. Furthermore, the central angle of the reflective convex plate 422 is smaller than the central angle of the notch of the arc-shaped guide plate 43. That is to say, the "C"-shaped arc-shaped guide plate 43 can avoid mutual collision with the reflective convex plate 422, thereby preventing the rotation of the rotating ring 42 from being hindered.

[0056] In order to ensure the structural strength of the annular tube 2 itself, the wall thickness of the annular tube 2 of the present application is greater than the wall thickness of the pipe segment body 1, and the inner cavities of the two are connected, thereby ensuring that even if the annular tube 2 itself is provided with a detection cavity 1 21, a connecting cavity 1 22, a connecting cavity 2 23 and a detection cavity 2 24, it still has good structural strength and will not be easily broken or damaged. A cable protective sleeve 6 for threading cables is provided on the outside of the pipe segment body 1, which can be used to waterproof the wires of the electrical components inside the device.

[0057] The present application also discloses a method for detecting the sealing performance and water pressure of a pipe joint according to the above method, which specifically comprises the following steps:

[0058] Step 1: The media on the inner and outer sides of the annular cylinder 2 enter the communicating chamber 1 22 and the communicating chamber 2 23 respectively. The media squeezes the flexible sealing layer 25 to deform and applies different pressures to the surfaces of the sliding ring 1 32 and the sliding ring 2 33 respectively. The sliding ring 1 32 and the sliding ring 2 33 slide synchronously and in the same direction under the action of the pressure difference. At this time, the compression amount of the compression springs 35 on both sides of the fixed ring 31 changes, the compression amount of one compression spring 35 increases, and the compression amount of the other compression spring 35 decreases. The two pressure sensors 36 detect readings of different sizes and transmit the data to the external controller for processing, so that the pressure difference between the inside and outside of the annular cylinder 2 can be detected;

[0059] Step 2: After the medium on the outside of the annular cylinder 2 enters the inner cavity of the connecting cavity 1 22, it will also squeeze the driving slip ring 41 in the inner cavity of the detection cavity 24. At this time, the driving slip ring 41 slides and drives the rotating ring 42 to rotate through the squeezing between the driving wedge 411 and the driven wedge 421. When the rotating ring 42 rotates, the position of the light emitted by the emitter 241 on the reflective coating 425 changes. Since the reflective coating 425 itself is curved, the reflection angle of the reflective coating 425 to the light changes. After the light is received by the receiving plate 242 and the data is transmitted to the external controller, the pressure of the medium outside the annular cylinder 2 can be detected.

[0060] Step 3: Combining the data detected in Step 1 and Step 2 above, the pressure of the medium in the inner cavity of the annular cylinder 2 can be calculated by simple addition and subtraction;

[0061] Step 4. Close the control valves at both ends of the pipe joint body 1, record the initial pressure difference between the inside and outside of the annular cylinder 2, and after a period of time, record the pressure difference between the inside and outside of the annular cylinder 2 again, and compare the two data. If there is no sealing problem between the pipe joint body 1 and the annular cylinder 2 themselves, the two pressure differential data are the same. If there is a sealing problem between the pipe joint body 1 and the annular cylinder 2 themselves, the two pressure differential data are different, and the pressure differential data recorded again is smaller than the initial pressure differential data and is close to zero.

[0062] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A pipe joint that is convenient for testing sealing and water pressure, characterized by: include: A pipe segment body (1), wherein an annular cylinder (2) is fixedly provided in the middle of the pipe segment body (1), a detection chamber 1 (21) is provided inside the side wall of the annular cylinder (2), a connecting chamber 1 (22) and a connecting chamber 2 (23) are provided on both sides of the detection chamber 1 (21), and the connecting chamber 1 (22) and the connecting chamber 2 (23) are connected to the inner and outer sides of the annular cylinder (2), respectively, and a detection chamber 2 (24) is provided on one side of the connecting chamber 1 (22); The inner cavity of the detection chamber 1 (21) is equipped with a pressure difference detector (3), and the inner cavity of the detection chamber 2 (24) is equipped with a pressure detector (4) for measuring the pressure of the inner cavity of the communication chamber 1 (22); The differential pressure detector (3) comprises a fixed ring (31), a sliding ring 1 (32) and a sliding ring 2 (33) are respectively provided on both sides of the fixed ring (31), and pressure sensors (36) are fixed on both sides of the fixed ring (31); The pressure detector (4) includes a rotatable rotating ring (42), a reflective convex plate (422) is fixed on the surface of the rotating ring (42), an arc-shaped groove (424) is formed on the surface of the reflective convex plate (422), and the bottom of the arc-shaped groove (424) is coated with a reflective coating (425), and an emitter (241) and a receiving plate (242) are installed on the inner wall of one side of the detection cavity (24), and light emitted by the emitter (241) is reflected by the reflective coating (425) and received by the receiving plate (242); The fixed ring (31) is located in the middle of the inner cavity of the detection cavity (21) and is fixedly connected to the annular cylinder (2). A plurality of guide holes (311) distributed in an annular array are provided on the surface of the fixed ring (31). A connecting column (34) is movably provided through the inner cavity of the guide hole (311), and the two ends of the connecting column (34) are fixedly connected to the sliding ring (32) and the sliding ring (33) respectively. A backing plate (37) is fixed on the surface of the pressure sensor (36), and a compression spring (35) is fixed on the surface of the backing plate (37). One end of the two compression springs (35) respectively abuts against the surfaces of the sliding ring 1 (32) and the sliding ring 2 (33), and the compression springs (35) are in a compressed state; The connection points between the communicating chamber 1 (22) and the detection chamber 1 (21), the connection points between the communicating chamber 2 (23) and the detection chamber 1 (21), and the connection points between the detection chamber 2 (24) and the communicating chamber 1 (22) are all provided with flexible sealing layers (25). The flexible sealing layer (25) is annular and made of elastically deformable silicone material. The inner and outer edges of the flexible sealing layer (25) are fixedly connected to limit stop rings (26), and the limit stop rings (26) are fixedly connected to the annular cylinder (2).

2. A pipe joint for facilitating detection of sealing and water pressure according to claim 1, characterized in that: A driving slip ring (41) is provided on one side of the rotating ring (42), and a gap is left between the two. A driving wedge (411) and a driven wedge (421) are fixedly connected to the side surfaces of the driving slip ring (41) and the rotating ring (42) that are close to each other. A plurality of the driving wedges (411) and the driven wedges (421) are provided and distributed in an annular array. The driving slip ring (41) slides along the axial direction of the annular cylinder (2) and drives the rotating ring (42) to rotate by mutual compression of the driving wedge (411) and the driven wedge (421).

3. A pipe joint for facilitating detection of sealing and water pressure according to claim 2, characterized in that: A notch groove (412) is provided at the edge of the driving slip ring (41), a limiting boss (243) corresponding to the notch groove (412) is fixed on the inner wall of the second detection chamber (24), a guide seat (426) is fixed on the surface of the rotating ring (42), a guide groove (427) is provided on the outer wall of the guide seat (426), an arc-shaped guide plate (43) is fixed on the inner wall of the second detection chamber (24), and the arc-shaped guide plate (43) is slidably connected to the guide groove (427).

4. A pipe joint for facilitating detection of sealing and water pressure according to claim 3, characterized in that: The arc-shaped guide plate (43) is in a "C" shape, and one end is fixedly connected to a fixed stopper (431). A return spring (423) is fixed between the fixed stopper (431) and the reflective convex plate (422). The central angle of the reflective convex plate (422) is smaller than the central angle of the notch of the arc-shaped guide plate (43).

5. A pipe joint for facilitating detection of sealing and water pressure according to claim 4, characterized in that: The pipe segment body (1) is a metal hose. The pipe segment body (1) is provided with two sections, which are respectively fixed at the two ends of the annular cylinder (2). The wall thickness of the annular cylinder (2) is greater than that of the pipe segment body (1), and the inner cavities of the two are connected. A control valve is provided at the end of the pipe segment body (1) away from the annular cylinder (2). A cable protective sleeve (6) for passing a cable is provided on the outside of the pipe segment body (1).

6. A pipe joint for facilitating detection of sealing and water pressure according to claim 5, characterized in that: Through holes (5) are provided on both inner and outer side walls of the annular cylinder (2), and the two through holes (5) are connected to the inner cavity of the first connecting cavity (22) and the inner cavity of the second connecting cavity (23) respectively.

7. A method for detecting a pipe joint for facilitating detection of sealing and water pressure according to claim 6, characterized in that: The specific steps include: Step 1: The medium on both sides of the annular cylinder (2) enters the communicating cavity 1 (22) and the communicating cavity 2 (23) respectively. The medium squeezes the flexible sealing layer (25) to deform and applies different pressures to the surfaces of the sliding ring 1 (32) and the sliding ring 2 (33). The sliding ring 1 (32) and the sliding ring 2 (33) slide synchronously and in the same direction under the action of the pressure difference. At this time, the compression amount of the compression springs (35) on both sides of the fixed ring (31) changes. The compression amount of one compression spring (35) increases and the compression amount of the other compression spring (35) decreases. The two pressure sensors (36) detect different readings and transmit the data to the external controller for processing, thereby detecting the pressure difference between the inside and outside of the annular cylinder (2). Step 2: After the medium outside the annular cylinder (2) enters the inner cavity of the communicating cavity 1 (22), it will also squeeze the driving slip ring (41) inside the inner cavity of the detecting cavity 2 (24). At this time, the driving slip ring (41) slides and drives the rotating ring (42) to rotate through the squeezing between the driving wedge (411) and the driven wedge (421). When the rotating ring (42) rotates, the position of the light emitted by the transmitter (241) on the reflective coating (425) changes. Since the reflective coating (425) itself is an arc, the reflection angle of the reflective coating (425) to the light changes. After receiving the light through the receiving plate (242), the data is transmitted to the external controller, and the pressure of the medium outside the annular cylinder (2) can be detected. Step 3: Combining the data detected in Step 1 and Step 2 above, the pressure of the medium in the inner cavity of the annular cylinder (2) can be calculated by simple addition and subtraction; Step 4: Close the control valves at both ends of the pipe segment body (1), record the initial pressure difference between the inside and outside of the annular cylinder (2), and after a period of time, record the pressure difference between the inside and outside of the annular cylinder (2) again. Compare the two data. If there is no sealing problem between the pipe segment body (1) and the annular cylinder (2), the two pressure difference data are the same. If there is a sealing problem between the pipe segment body (1) and the annular cylinder (2), the two pressure difference data are different, and the pressure difference data recorded again is close to zero.

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