Internal water pressure testing device for concrete and reinforced concrete drainage pipes

Abstract

The invention discloses an internal water pressure testing device for concrete and reinforced concrete drainage pipes, and relates to the technical field of pressure testing equipment. Comprising a base, the base is fixedly connected with a supporting seat and a sliding rail, the sliding rail is slidably connected with two sliding blocks, the sliding block on one side is fixedly connected with a first baffle, and the sliding block on the other side is fixedly connected with a second baffle; the two inner supporting rings are fixedly connected to the opposite sides of the first baffle and the second baffle respectively, and inner liquid bags are fixedly connected to the outer sides of the inner supporting rings; the two power cylinders are fixedly connected to the first baffle and the second baffle correspondingly. According to the invention, a mode of oppositely extruding the two ends of the drain pipe to realize sealing is replaced by a mode of internally expanding and sealing the two ends of the drain pipe, so that the condition of uneven extrusion force on the two ends of the drain pipe is avoided, and the interference of other forces except internal water pressure on the drain pipe in the test process is reduced; and the reliability of a test result is improved.

Description

Technical Field

[0001] The invention relates to the technical field of pressure testing equipment, in particular to an internal water pressure testing device for concrete and reinforced concrete drainage pipes. Background Art

[0002] In order to ensure the quality of concrete and reinforced concrete drain pipes used in municipal drainage projects, water conservancy projects and construction projects, it is necessary to conduct an internal water pressure test on the drain pipes to detect their sealing and verify their structural strength. At present, when conducting the above test, the drain pipe is usually placed between two metal plates by hoisting. Rubber pads are pasted on the opposite surfaces of the two metal plates to seal the two ends of the drain pipe, thereby forming a closed space inside the drain pipe. Subsequently, water is injected into the closed space until a predetermined pressure value is reached. After maintaining it for a period of time, check whether there are cracks or water seepage on the surface of the drain pipe, so as to evaluate the sealing and structural strength of the drain pipe.

[0003] However, in actual operation, the drain pipe will be tilted relative to the test device when it is hoisted between the two metal plates, resulting in different compression amounts at different contact positions between the rubber pad and the drain pipe, which in turn causes uneven pressure distribution on both ends of the drain pipe by the rubber pad. This uneven pressure distribution will cause different parts of the drain pipe to bear different stresses. When conducting an internal water pressure test, stress concentration will occur in certain parts, which will not only easily cause cracks or water seepage in the drain pipe under a lower internal water pressure, but also interfere with the accurate evaluation of the actual pressure-bearing capacity of the drain pipe. Summary of the invention

[0004] The present invention provides an internal water pressure testing device for concrete and reinforced concrete drainage pipes, so as to overcome the disadvantages of the existing drainage pipes inclination during the internal water pressure test, resulting in stress concentration in the drainage pipes and interfering with the evaluation of the actual pressure bearing capacity of the drainage pipes.

[0005] Technical solution: An internal water pressure test device for concrete and reinforced concrete drainage pipes, comprising: A base, wherein the base is fixedly connected to a support seat and a slide rail, wherein the slide rail is slidably connected to two sliders, wherein the slider on one side is fixedly connected to a first baffle, and the slider on the other side is fixedly connected to a second baffle; Two inner support rings are respectively fixed to the opposite sides of the first baffle plate and the second baffle plate, and the outer sides of the inner support rings are fixed with inner liquid capsules; Two power cylinders are respectively fixed to the first baffle and the second baffle, an extrusion piece is limited in position and sealed and slidably connected inside the power cylinder, the extrusion piece cooperates with the adjacent power cylinder to form a power cavity, the inner liquid bag is communicated with the adjacent power cavity through a catheter, the power cylinder is rotatably connected to a tightening piece, and the tightening piece is threadedly connected to the adjacent extrusion piece; a pressure gauge, mounted on the second baffle; A connecting pipe is fixedly connected to the second baffle, and one end of the connecting pipe away from the first baffle is fixedly connected to and connected with an exhaust valve; The liquid injection pipe is fixedly connected to the first baffle.

[0006] Furthermore, it also includes: Two outer support rings are respectively fixed to the opposite sides of the first baffle plate and the second baffle plate, an outer liquid bag is fixed to the inner side of the outer support ring, and the outer liquid bag is connected with the adjacent power cavity through a catheter. The outer support ring is located on the outer side of the adjacent inner support ring, and the central axis of the inner support ring is collinear with the central axis of the outer support ring.

[0007] Furthermore, it also includes: The pressure valve is fixedly connected to and communicated with the communicating pipe.

[0008] Furthermore, in the direction from the injection pipe to the connecting pipe, the thickness of the base gradually increases.

[0009] Furthermore, it also includes: The collecting shell is fixedly connected to one end of the connecting pipe close to the first baffle. The collecting shell is provided with a cavity and a collecting chamber connected with the outside, and the collecting chamber is connected with the connecting pipe.

[0010] Furthermore, it also includes: The swinging member is sealingly and rotatably connected to one end of the liquid injection pipe close to the second baffle.

[0011] Furthermore, it also includes: The power wheel is fixedly connected to the swing member. A plurality of arc-shaped flow channels are arranged in the power wheel, and the arc-shaped flow channels are communicated with the swing member.

[0012] Furthermore, the sum of the flow areas of the plurality of arc-shaped flow channels is smaller than the flow area of ​​the swing member.

[0013] Furthermore, it also includes: The mounting ring is rotatably connected to the liquid injection tube. The mounting ring is fixedly connected with a shielding plate and a control component through a bracket. The bracket of the mounting ring is limitedly matched with the liquid injection tube.

[0014] Furthermore, the control member and the shielding plate are made of the same material, and the volume of the control member is greater than the volume of the shielding plate.

[0015] The present invention includes at least the following beneficial effects: the present invention replaces the sealing method of squeezing the two ends of the drain pipe oppositely with the sealing method of stretching the two ends of the drain pipe internally, thereby eliminating the need to apply opposite squeezing forces to the two ends of the drain pipe. On the one hand, it avoids the situation where the squeezing forces on the two ends of the drain pipe are uneven, and on the other hand, it reduces the interference of forces other than the internal water pressure on the drain pipe during the test, thereby improving the reliability of the test results. The outer liquid bladder is used to cooperate with the inner liquid bladder to form a double-layer seal for the drain pipe, thereby improving the sealing of the drain pipe during the test, and on the other hand, it squeezes the outer sides of the left and right ends of the drain pipe to offset the outward squeezing force of the inner liquid bladder on the two ends of the drain pipe, thereby reducing the interference of other forces on the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the base, the support seat and the slide rail of the present invention; Figure 3 It is a three-dimensional structural cross-sectional view of the second baffle, the inner support ring and the inner liquid capsule of the present invention; Figure 4 It is a three-dimensional structural schematic diagram of the power cylinder, the extrusion piece and the tightening piece of the present invention; Figure 5 The present invention is attached Figure 4 The enlarged view of point A in the middle; Figure 6 It is a schematic diagram of the three-dimensional structure of the liquid injection pipe, the swinging member and the power wheel of the present invention; Figure 7 It is a schematic diagram of the three-dimensional structure of the swing member, the power wheel and the mounting ring of the present invention; Figure 8 It is a three-dimensional structural cross-sectional view of the swing member and the power wheel of the present invention; Fig. 9 It is a schematic diagram of the three-dimensional structure of the shielding plate and the control member after rotation of the present invention.

[0017] Among them, the above-mentioned drawings include the following drawing marks: 1-base, 2-support seat, 3-slide rail, 4-slider, 5-first baffle, 6-second baffle, 7-inner support ring, 8-inner liquid capsule, 9-power cylinder, 10-extrusion member, 101-power chamber, 11-fastening member, 12-pressure gauge, 13-connecting pipe, 14-exhaust valve, 15-liquid injection pipe, 16-outer support ring, 17-outer liquid capsule, 19-pressure valve, 20-collection shell, 201-collection chamber, 202-cavity, 21-swinging member, 22-power wheel, 221-arc flow channel, 23-mounting ring, 24-baffle plate, 25-control member. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0019] An internal water pressure test device for concrete and reinforced concrete drainage pipes, see Figure 1-Figure 4 , including: a base 1, the base 1 is fixedly connected with a support seat 2 and a slide rail 3, the slide rail 3 is slidably connected with two sliders 4, the slider 4 on one side is fixedly connected with a first baffle 5, and the slider 4 on the other side is fixedly connected with a second baffle 6; two inner support rings 7, respectively fixedly connected to the opposite sides of the first baffle 5 and the second baffle 6, and the outer side of the inner support ring 7 is fixedly connected with an inner liquid capsule 8; two power cylinders 9, respectively fixedly connected to the first baffle 5 and the second baffle 6, and an extrusion piece is limited and sealed and slidably connected inside the power cylinder 9 10, the extrusion piece 10 cooperates with the adjacent power cylinder 9 to form a power chamber 101, the inner liquid capsule 8 is connected with the adjacent power chamber 101 through a catheter, the power cylinder 9 is rotatably connected with a tightening piece 11, and the tightening piece 11 is threadedly connected with the adjacent extrusion piece 10; the pressure gauge 12 is installed on the second baffle 6; the connecting pipe 13 is fixedly connected to the second baffle 6, and the end of the connecting pipe 13 away from the first baffle 5 is fixedly connected and connected with an exhaust valve 14; the injection pipe 15 is fixedly connected to the first baffle 5.

[0020] The above scheme aims to solve the problem that during the internal water pressure test of the drain pipe, the drain pipe is tilted, resulting in uneven force at various places, causing stress concentration in the drain pipe and interfering with the evaluation of the actual pressure-bearing capacity of the drain pipe. In order to solve the above problem, the present scheme first uses the support seat 2 to support the drain pipe, and then replaces the method of sealing by squeezing the two ends of the drain pipe in opposite directions with a method of stretching and sealing the two ends of the drain pipe inwardly, without applying opposite squeezing pressure to the two ends of the drain pipe. In this way, on the one hand, the uneven squeezing pressure on the two ends of the drain pipe is avoided, and on the other hand, the interference of the drain pipe with other forces except the internal water pressure during the test is reduced, thereby improving the reliability of the test results.

[0021] Four connecting rods are arranged between the first baffle plate 5 and the second baffle plate 6 (see the attached Figure 1), and both ends of the connecting rod are threadedly connected with nuts, and the distance between the first baffle 5 and the second baffle 6 is controlled by the nuts at both ends of the connecting rod; rollers can be set at the lower part of the first baffle 5 and the second baffle 6 to provide support for the first baffle 5 and the second baffle 6, thereby improving the stability of the first baffle 5 and the second baffle 6 during movement; annular inclined surfaces can be set at the outer peripheries of the opposite sides of the two inner support rings 7 to facilitate the inner support rings 7 to extend into the drain pipe; the connecting pipe 13 passes through the upper part of the second baffle 6 and the adjacent inner support rings 7; the drain pipe, the first baffle 5, the second baffle 6, the two inner support rings 7 and the two inner liquid bags 8 cooperate to form a test chamber; the power chamber 101 may contain a liquid medium such as hydraulic oil.

[0022] See also Figure 1-Figure 4 , and also includes: two outer support rings 16, which are respectively fixed to the opposite sides of the first baffle 5 and the second baffle 6, and the inner side of the outer support ring 16 is fixed with an outer liquid capsule 17, and the outer liquid capsule 17 is connected with the adjacent power chamber 101 through a catheter. The outer support ring 16 is located on the outer side of the adjacent inner support ring 7, and the central axis of the inner support ring 7 is collinear with the central axis of the outer support ring 16.

[0023] In the above scheme, the purpose is to utilize the outer liquid sac 17 to cooperate with the inner liquid sac 8 to form a double-layer seal for the drain pipe on the one hand, thereby improving the sealing performance of the drain pipe during the test; on the other hand, to squeeze the outer sides of the left and right ends of the drain pipe to offset the outward squeezing force of the inner liquid sac 8 on the two ends of the drain pipe, thereby reducing the interference of other forces on the test results; annular inclined surfaces can be set on the inner circumferences of the opposite sides of the two outer support rings 16 to facilitate the drain pipe to enter between the outer support ring 16 and the inner support ring 7.

[0024] See also Figure 4 , further comprising: a pressure valve 19, which is fixedly connected to and communicated with the connecting pipe 13; in the direction from the injection pipe 15 to the connecting pipe 13, the thickness of the base 1 gradually increases.

[0025] The above scheme aims to solve the problem that during the existing test, when the water pressure in the test chamber (the stage in which the water pressure continues to increase is the pressurization stage) reaches a predetermined value (this value is determined according to the material of the drainage pipe and the application environment, and this value is 0.1MPa in this scheme), water injection into the test chamber is stopped (this is the pressure maintenance stage) and a predetermined time is waited (the length of time is determined according to the material of the drainage pipe and the application environment, and this time is ten minutes in this scheme). During the pressure maintenance stage, part of the water in the test chamber seeps into the drainage pipe, reducing the water pressure in the test chamber, which is easy to The problem that potential defects of the drain pipe cannot be discovered; this solution adopts a method of continuously injecting water into the test chamber, and uses a pressure valve 19 to discharge excess water in the test chamber in real time, and maintains the water pressure in the test chamber to be stable; in the direction from left to right, the thickness of the base 1 gradually increases, so that during the test, the left end of the drain pipe tilts downward, promoting the gas in the drain pipe to move to the right and be discharged through the connecting pipe 13; a drain pipe (not shown in the figure) can be set at the lower part of the first baffle 5 to discharge the water in the test chamber after the test.

[0026] See also Figure 3-Figure 5 , and also includes: a collecting shell 20, which is fixed to one end of the connecting pipe 13 close to the first baffle 5, and a cavity 202 and a collecting chamber 201 communicating with the outside are provided in the collecting shell 20, and the collecting chamber 201 is communicated with the connecting pipe 13.

[0027] In the above process, the purpose is to use the collecting shell 20 to guide the gas in the test chamber to be discharged quickly; the collecting shell 20 and the connecting tube 13 are both made of elastic materials. Before the drain pipe is fixed and the liquid level in the test chamber does not contact the collecting shell 20, the collecting shell 20 drives the left part of the connecting tube 13 to bend downward under the action of its own gravity, so that the collecting shell 20 is located on the inner side of the inner support ring 7, and does not hinder the drain pipe from entering between the inner support ring 7 and the outer support ring 16. During the internal water pressure test, the collecting chamber 201 connects the test chamber with the connecting tube 13. After the liquid level in the test chamber submerges the collecting shell 20, the buoyancy provided by the cavity 202 to the collecting shell 20 is greater than the gravity of the collecting shell 20. At this time, the upper side of the collecting shell 20 is attached to the inner side of the drain pipe, and the gas inside the drain pipe is guided to the connecting tube 13 through the collecting chamber 201.

[0028] See also Figure 6-Figure 9 , and also includes: a swinging member 21, which is sealed and rotatably connected to one end of the injection tube 15 near the second baffle 6; and also includes: a power wheel 22, which is fixed to the swinging member 21, and a plurality of arc-shaped flow channels 221 are arranged in the power wheel 22, and the arc-shaped flow channels 221 are connected to the swinging member 21; the sum of the flow areas of the plurality of arc-shaped flow channels 221 is smaller than the flow area of ​​the swinging member 21.

[0029] The above scheme aims to solve the following problems: after water is injected into the test chamber, the rough wall of the drain pipe makes the gas encounter great resistance when moving along the wall, which makes it impossible for the gas in the test chamber to be completely discharged, so that the location where the gas gathers in the test chamber will form a local high pressure, resulting in uneven pressure on the wall of the drain pipe; the dissolved gas in the water of the test chamber is easy to precipitate from the water when the external environmental conditions change (for example, there are impurities on the inner wall of the drain pipe. When the dissolved gas in the water moves to the vicinity of the impurities, the gas will gather on the surface of the impurities and eventually form bubbles), resulting in the problem that bubbles are still generated in the test chamber during the pressure holding stage; on the one hand, this scheme controls the direction of water injection in the test chamber by the swinging member 21, so that the water in the test chamber is in a fluctuating state, which causes the top of the inner wall of the drain pipe to On the one hand, the bubbles move, and on the other hand, the flow of water in the test chamber is guided by the swinging member 21, and the bubbles gathered on the top of the inner wall of the drain pipe are driven to the right by the impact of the water flow, so that the bubbles enter the connecting pipe 13; the end of the swinging member 21 can be flat, which increases the width of the water flow sprayed by the swinging member 21; the sum of the flow areas of all the arc-shaped flow channels 221 is smaller than the flow area of ​​the swinging member 21, so that most of the water is sprayed into the test chamber through the swinging member 21, and a small part of the water enters the test chamber from the arc-shaped flow channel 221; in the clockwise direction, the distance between the arc-shaped flow channel 221 and the central axis of the power wheel 22 gradually decreases. Through the guidance of the arc-shaped flow channel 221, there is an angle between the line connecting the end of the arc-shaped flow channel 221 and the central axis of the power wheel 22 and the direction of the water flow sprayed from the arc-shaped flow channel 221.

[0030] Since the resistance of air to water flow is smaller than the resistance of water to water flow, before the water in the test chamber covers the power wheel 22, the power wheel 22 is in a stationary state under the gravity of the swing member 21. When the water in the test chamber covers the power wheel 22, the water ejected from the arc-shaped flow channel 221 is subject to the resistance of the water in the test chamber, so that the water ejected from the arc-shaped flow channel 221 pushes the power wheel 22 to rotate clockwise. Initially, the swing member 21 faces downward under the action of its own gravity, so that the water ejected from the swing member 21 is accelerated by the initial velocity and the acceleration of gravity. The test chamber 10 collides with the bottom of the test chamber, and the discharge of dissolved gas in the water is promoted by the collision of water flow, thereby reducing the content of dissolved gas in the water, and further reducing the volume of bubbles in the test chamber during the test. At the same time, during the pressurization stage, water is continuously injected into the test chamber and water is discharged, so as to promote the discharge of bubbles in the test chamber during the pressurization stage. When the water pressure in the test chamber reaches a predetermined value, the pressure maintaining stage is entered. At this time, water is slowly injected into the test chamber through the injection tube 15, which can maintain the stability of the water pressure in the test chamber on the one hand, and discharge the newly generated bubbles in the test chamber in time on the other hand.

[0031] See also Figure 6-Figure 9, and also includes: a mounting ring 23, which is rotatably connected to the injection tube 15, the mounting ring 23 is fixedly connected with a baffle plate 24 and a control member 25 through a bracket, and the bracket of the mounting ring 23 is limitedly matched with the injection tube 15; the control member 25 and the baffle plate 24 are made of the same material, and the volume of the control member 25 is larger than the volume of the baffle plate 24.

[0032] In the above scheme, the shielding plate 24 is used to shield the swinging member 21, so that after the water immerses the swinging member 21, the water ejected from the swinging member 21 can collide with the shielding plate 24 under the action of the initial velocity, so that the dissolved gas in the water is discharged; the density of the shielding plate 24 and the control member 25 is less than the density of water. When the water in the test chamber does not immerse the shielding plate 24 and the control member 25, the control member 25 is maintained at the bottom and the shielding plate 24 is maintained at the top under the action of the gravity of the two (see Appendix Figure 6 ), when the water in the test chamber submerges the shielding plate 24 and the control member 25, the buoyancy of the control member 25 is greater than the buoyancy of the shielding plate 24, causing the control member 25 to move upward, and the control member 25 drives the shielding plate 24 to move downward (see Appendix Fig. 9 ).

[0033] The working principle of the above scheme is as follows: after the concrete and reinforced concrete drain pipes are produced, when an internal water pressure test is required, a number of drain pipes are selected by random sampling (the number of drain pipes is determined by the total amount of drain pipes in this batch), and then the drain pipes are moved to the support seat 2 by a crane. At this time, the tester tightens the bolts on the connecting rod to reduce the distance between the first baffle 5 and the second baffle 6 until the inner support ring 7 and the outer support ring 16 move to the inner and outer sides of the adjacent ends of the drain pipe respectively. At this time, the bolts on the connecting rod are stopped, and the two tightening parts 11 are rotated. The tightening part 11 drives the extrusion part 10 to move through the thread, and the hydraulic oil in the power chamber 101 is squeezed into the adjacent inner liquid capsule 8 and outer liquid capsule 17 through the conduit. The inner liquid capsule 8 and the outer liquid capsule 17 expand and contact the inner and outer sides of the drain pipe respectively, so as to squeeze the drain pipe. The left and right ends are sealed to form a test chamber. The rotation of the tightening member 11 is stopped, and water is then injected into the test chamber through the injection tube 15. The water in the injection tube 15 enters the swinging member 21, and then most of the water in the swinging member 21 is discharged through it, and a small part of the water enters the power wheel 22 and is discharged through the arc flow channel 221. As the liquid level in the test chamber rises, the gas in the test chamber is discharged to the outside through the collecting chamber 201, the connecting pipe 13 and the exhaust valve 14. When the water level in the test chamber submerges the power wheel 22, the power wheel 22 rotates clockwise under the drive of the water flow ejected from the arc flow channel 221, and the power wheel 22 drives the swinging member 21 to rotate clockwise. The water ejected from the swinging member 21 always "moves" the bubbles retained in the upper part of the test chamber to the right, and pushes the bubbles to the connecting pipe 13, thereby promoting the discharge of the bubbles in the test chamber.

[0034] When the water in the test chamber covers the baffle 24 and the control member 25, the control member 25 moves upward under the action of buoyancy, causing the baffle 24 to move downward. When the swing member 21 rotates until the extension line of the direction of the water flow sprayed by the swing member 21 does not pass through the annular side of the test chamber, the water flow sprayed by the swing member 21 collides with the baffle 24. As the swing member 21 rotates, the direction of the water flow sprayed by the swing member 21 is perpendicular to the first baffle 5. At this time, the water flow sprayed by the swing member 21 collides with the first baffle 5. Then the swing member 21 continues to rotate, driving the bubbles on the upper part of the test chamber to the right. The water pressure in the test chamber gradually reaches the set value (i.e., 0.1MPa, the pressurization stage ends, and the pressure holding stage begins). At this time, the injection pipe 15 slowly injects water into the test chamber, and the water pressure in the test chamber gradually becomes greater than Set value, at this time, the pressure valve 19 is opened, and the excess water in the test chamber is discharged through the collecting chamber 201, the connecting pipe 13 and the pressure valve 19, so as to keep the pressure in the test chamber stable. At the same time, in the process of water discharge in the test chamber, the newly generated bubbles will be driven to move to the right, and finally the bubbles will be discharged through the collecting chamber 201, the connecting pipe 13 and the exhaust valve 14 until the test is finished, and the injection of water into the injection pipe 15 is stopped, and the water in the test chamber is discharged through the drain pipe. At this time, the test personnel observe whether there are cracks and traces of water seepage on the surface of the drain pipe and record the observation data, then the test personnel remove the drain pipe and repeat the above test steps until all the selected drain pipes in the batch have completed the test, and judge whether the batch of drain pipes is qualified according to the conditions of all the drain pipes in the batch.

[0035] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An internal water pressure test device for concrete and reinforced concrete drainage pipes, characterized in that: include: A base (1), the base (1) being fixedly connected to a support seat (2) and a slide rail (3), the slide rail (3) being slidably connected to two slide blocks (4), the slide block (4) on one side being fixedly connected to a first baffle (5), and the slide block (4) on the other side being fixedly connected to a second baffle (6); Two inner support rings (7) are respectively fixedly connected to the opposite sides of the first baffle plate (5) and the second baffle plate (6); the outer sides of the inner support rings (7) are fixedly connected with inner liquid capsules (8); Two power cylinders (9) are respectively fixed to the first baffle plate (5) and the second baffle plate (6); an extrusion piece (10) is limited in position and sealed and slidably connected inside the power cylinder (9); the extrusion piece (10) cooperates with the adjacent power cylinder (9) to form a power cavity (101); the inner liquid capsule (8) is connected to the adjacent power cavity (101) through a conduit; the power cylinder (9) is rotatably connected to a tightening piece (11); the tightening piece (11) is threadedly connected to the adjacent extrusion piece (10); a pressure gauge (12) mounted on the second baffle (6); A connecting pipe (13) is fixedly connected to the second baffle (6); one end of the connecting pipe (13) away from the first baffle (5) is fixedly connected to and communicated with an exhaust valve (14); The liquid injection pipe (15) is fixedly connected to the first baffle (5).

2. The internal water pressure test device for concrete and reinforced concrete drainage pipes according to claim 1, characterized in that: include: Two outer support rings (16) are respectively fixedly connected to the opposite sides of the first baffle plate (5) and the second baffle plate (6); an outer liquid sac (17) is fixedly connected to the inner side of the outer support ring (16); the outer liquid sac (17) is connected to the adjacent power chamber (101) through a conduit; the outer support ring (16) is located outside the adjacent inner support ring (7), and the central axis of the inner support ring (7) is collinear with the central axis of the outer support ring (16).

3. The internal water pressure test device for concrete and reinforced concrete drainage pipes according to claim 1, characterized in that: include: The pressure valve (19) is fixedly connected to and communicated with the connecting pipe (13).

4. The internal water pressure test device for concrete and reinforced concrete drainage pipes according to claim 3, characterized in that: In the direction from the injection pipe (15) to the connecting pipe (13), the thickness of the base (1) gradually increases.

5. The internal water pressure test device for concrete and reinforced concrete drainage pipes according to claim 4, characterized in that: include: A collecting shell (20) is fixedly connected to one end of the connecting pipe (13) close to the first baffle (5); a cavity (202) and a collecting chamber (201) communicating with the outside are provided in the collecting shell (20); the collecting chamber (201) is communicated with the connecting pipe (13).

6. The internal water pressure test device for concrete and reinforced concrete drainage pipes according to claim 1, characterized in that: include: The swinging member (21) is sealingly and rotatably connected to one end of the liquid injection pipe (15) close to the second baffle (6).

7. The internal water pressure test device for concrete and reinforced concrete drainage pipes according to claim 6, characterized in that: include: The power wheel (22) is fixedly connected to the swing member (21), and a plurality of arc-shaped flow channels (221) are arranged in the power wheel (22), and the arc-shaped flow channels (221) are connected to the swing member (21).

8. The internal water pressure test device for concrete and reinforced concrete drainage pipes according to claim 7, characterized in that: The sum of the flow areas of the plurality of arc-shaped flow channels (221) is smaller than the flow area of ​​the swing member (21).

9. The internal water pressure test device for concrete and reinforced concrete drainage pipes according to claim 6, characterized in that: include: The mounting ring (23) is rotatably connected to the liquid injection tube (15); the mounting ring (23) is fixedly connected to a shielding plate (24) and a control member (25) via a bracket; the bracket of the mounting ring (23) is limitedly matched with the liquid injection tube (15).

10. The internal water pressure test device for concrete and reinforced concrete drainage pipes according to claim 9, characterized in that: The control component (25) and the shielding plate (24) are made of the same material, and the volume of the control component (25) is greater than the volume of the shielding plate (24).

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