An internal water pressure test device for concrete and reinforced concrete drainage pipes

Abstract

The present invention discloses an internal water pressure test device for concrete and reinforced concrete drainage pipes, which relates to the technical field of pressure test equipment. It includes: a base, on which a support seat and a slide rail are fixedly connected, two sliders are slidably connected to the slide rail, a first baffle is fixedly connected to one side of the slider, and a second baffle is fixedly connected to the other side of the slider; two inner support rings are respectively fixedly connected to the opposite sides of the first baffle and the second baffle, and an inner liquid bag is fixedly connected to the outer side of the inner support ring; two power cylinders are respectively fixedly connected to the first baffle and the second baffle. By changing the way of sealing by squeezing the two ends of the drainage pipe in opposite directions to the way of expanding and sealing the inside of the two ends of the drainage pipe, on the one hand, the situation of uneven extrusion force on the two ends of the drainage pipe is avoided, and on the other hand, the interference of other forces on the drainage pipe during the test except the internal water pressure is reduced, and the reliability of the test result is improved.

Description

Technical Field

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

[0002] In order to ensure the quality of concrete and reinforced concrete drainage pipes used in municipal drainage projects, water conservancy projects and building projects, it is necessary to conduct an internal water pressure test on the drainage pipes to detect their sealing performance and verify their structural strength; currently, when conducting the above tests, the drainage pipes are usually placed between two metal discs by means of hoisting, and rubber pads are pasted on the opposite surfaces of the two metal discs to seal the two ends of the drainage pipes, thereby forming a closed space inside the drainage pipes; subsequently, water is injected into this closed space until a predetermined pressure value is reached, and after maintaining for a period of time, the surface of the drainage pipes is inspected for cracks or water seepage to evaluate the sealing performance and structural strength of the drainage pipes.

[0003] However, in the actual operation process, since the drainage pipes will be inclined relative to the test device when being hoisted between the two metal discs, resulting in different compression amounts at different contact positions between the rubber pads and the drainage pipes, and further causing uneven pressure distribution exerted by the rubber pads on the two ends of the drainage pipes. This uneven pressure distribution will cause different stresses on each part of the drainage pipes. During the internal water pressure test, stress concentration will occur in some parts, which will not only easily cause cracks or water seepage in the drainage pipes under a relatively low internal water pressure, but also interfere with the accurate evaluation of the actual bearing capacity of the drainage pipes. Summary of the Invention

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

[0005] Technical Solution: An internal water pressure test device for concrete and reinforced concrete drainage pipes, comprising:

[0006] A base, the base is fixedly connected with a support seat and a slide rail, two sliders are slidably connected to the slide rail, a first baffle is fixedly connected to one side of the slider, and a second baffle is fixedly connected to the other side of the slider;

[0007] Two inner support rings are respectively fixedly connected to the opposite sides of the first baffle and the second baffle, and an inner liquid bag is fixedly connected to the outer side of the inner support ring;

[0008] Two power cylinders are respectively fixedly connected to the first baffle and the second baffle. An extrusion member is limited and slidably connected in the power cylinder in a sealed manner. The extrusion member and the adjacent power cylinder cooperate to form a power chamber. The inner liquid sac is communicated with the adjacent power chamber through a conduit. The power cylinder is rotatably connected with a tightening member, and the tightening member is threadedly connected with the adjacent extrusion member;

[0009] A pressure gauge is installed on the second baffle;

[0010] A connecting pipe is fixedly connected to the second baffle, and an exhaust valve is fixedly connected and communicated at one end of the connecting pipe away from the first baffle;

[0011] A liquid injection pipe is fixedly connected to the first baffle.

[0012] Furthermore, it further includes:

[0013] Two outer support rings are respectively fixedly connected to the opposite sides of the first baffle and the second baffle. An outer liquid sac is fixedly connected to the inner side of the outer support ring. The outer liquid sac is communicated with the adjacent power chamber through a conduit. The outer support ring is located outside 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.

[0014] Furthermore, it further includes:

[0015] A pressure valve is fixedly connected and communicated with the connecting pipe.

[0016] Furthermore, in the direction from the liquid injection pipe to the connecting pipe, the thickness of the base gradually increases.

[0017] Furthermore, it further includes:

[0018] A collection shell is fixedly connected to one end of the connecting pipe close to the first baffle. A cavity and a collection chamber communicated with the outside are arranged in the collection shell, and the collection chamber is communicated with the connecting pipe.

[0019] Furthermore, it further includes:

[0020] A swinging member is rotatably connected in a sealed manner to one end of the liquid injection pipe close to the second baffle.

[0021] Furthermore, it further includes:

[0022] A power wheel is fixedly connected to the swinging member. A plurality of arc-shaped flow channels are arranged in the power wheel, and the arc-shaped flow channels are communicated with the swinging member.

[0023] Furthermore, the sum of the flow areas of the plurality of arc-shaped flow channels is smaller than the flow area of the swinging member.

[0024] Furthermore, it further includes:

[0025] The mounting ring is rotatably connected to the liquid injection pipe. The mounting ring is fixedly connected with a shielding plate and a control member through a bracket, and the bracket of the mounting ring is in limit fit with the liquid injection pipe.

[0026] Furthermore, the control member and the shielding plate are made of the same material, and the volume of the control member is larger than that of the shielding plate.

[0027] The present invention has at least the following beneficial effects: The present invention replaces the method of sealing by squeezing the two ends of the drain pipe in opposite directions with the method of expanding and sealing the inside of the two ends of the drain pipe, without applying opposite squeezing forces to the two ends of the drain pipe. On the one hand, it avoids the uneven squeezing forces received by the two ends of the drain pipe, and on the other hand, it reduces the interference of other forces on the drain pipe during the test except for the internal water pressure, improving the reliability of the test results; The outer liquid bladder is used to form a double-layer seal for the drain pipe in cooperation with the inner liquid bladder on the one hand, improving the sealing performance of the drain pipe during the test, and on the other hand, squeezing the outer sides of the left and right ends of the drain pipe to offset the outward squeezing forces of the inner liquid bladder on the two ends of the drain pipe, reducing the interference of other forces on the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0029] Figure 2 is a three-dimensional structural schematic diagram of the base, support seat and slide rail of the present invention;

[0030] Figure 3 is a three-dimensional structural sectional view of the second baffle, inner support ring and inner liquid bladder of the present invention;

[0031] Figure 4 is a three-dimensional structural schematic diagram of the power cylinder, extrusion member and tightening member of the present invention;

[0032] Figure 5 is attached to the present invention Figure 4 is an enlarged view of part A in;

[0033] Figure 6 is a three-dimensional structural schematic diagram of the liquid injection pipe, swing member and power wheel of the present invention;

[0034] Figure 7 is a three-dimensional structural schematic diagram of the swing member, power wheel and mounting ring of the present invention;

[0035] Figure 8 is a three-dimensional structural sectional view of the swing member and power wheel of the present invention;

[0036] Figure 9 is a three-dimensional structural schematic diagram of the shielding plate and control member after rotation of the present invention.

[0037] Among them, the above-mentioned drawings include the following reference numerals: 1 - base, 2 - support base, 3 - slide rail, 4 - slider, 5 - first baffle, 6 - second baffle, 7 - inner support ring, 8 - inner liquid sac, 9 - power cylinder, 10 - extrusion member, 101 - power chamber, 11 - tightening member, 12 - pressure gauge, 13 - connecting pipe, 14 - exhaust valve, 15 - liquid injection pipe, 16 - outer support ring, 17 - outer liquid sac, 19 - pressure valve, 20 - collection shell, 201 - collection chamber, 202 - cavity, 21 - swing member, 22 - power wheel, 221 - arc-shaped flow channel, 23 - mounting ring, 24 - shielding baffle, 25 - control member. Detailed implementation manners

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0039] An internal water pressure test device for concrete and reinforced concrete drainage pipes, see Figures 1-4 , including: a base 1, a support base 2 and a slide rail 3 are fixedly connected to the base 1, two sliders 4 are slidably connected to the slide rail 3, a first baffle 5 is fixedly connected to one side of the slider 4, and a second baffle 6 is fixedly connected to the other side of the slider 4; two inner support rings 7 are respectively fixedly connected to the opposite sides of the first baffle 5 and the second baffle 6, and an inner liquid sac 8 is fixedly connected to the outer side of the inner support ring 7; two power cylinders 9 are respectively fixedly connected to the first baffle 5 and the second baffle 6, an extrusion member 10 is limited and sealed and slidably connected in the power cylinder 9, the extrusion member 10 and the adjacent power cylinder 9 cooperate to form a power chamber 101, the inner liquid sac 8 is communicated with the adjacent power chamber 101 through a conduit, a tightening member 11 is rotatably connected to the power cylinder 9, and the tightening member 11 is threadedly connected to the adjacent extrusion member 10; a pressure gauge 12 is installed on the second baffle 6; a connecting pipe 13 is fixedly connected to the second baffle 6, and an exhaust valve 14 is fixedly connected and communicated to the end of the connecting pipe 13 away from the first baffle 5; a liquid injection pipe 15 is fixedly connected to the first baffle 5.

[0040] In the above solution, it aims to solve the problem that during the internal water pressure test of the drainage pipe, the drainage pipe is inclined, resulting in uneven stress on each part, causing stress concentration in the drainage pipe and interfering with the evaluation of the actual pressure-bearing capacity of the drainage pipe; to solve the above problem, first, the support base 2 is used to support the drainage pipe, and then the method of sealing by squeezing the two ends of the drainage pipe oppositely is replaced with the method of sealing by expanding the inside of the two ends of the drainage pipe. There is no need to apply opposite squeezing forces to the two ends of the drainage pipe. In this way, on the one hand, the situation of uneven squeezing forces on the two ends of the drainage pipe is avoided, and on the other hand, the interference of other forces on the drainage pipe during the test except for the internal water pressure is reduced, improving the reliability of the test results.

[0041] Four connecting rods are arranged through between the first baffle 5 and the second baffle 6 (see the appendix Figure 1 ), and nuts are threadedly connected to both ends of the connecting rod. 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 arranged at the lower parts of the first baffle 5 and the second baffle 6 to provide support for the first baffle 5 and the second baffle 6 and improve the stability of the first baffle 5 and the second baffle 6 during movement; annular inclined surfaces can be arranged on the outer circumferences 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 parts of the second baffle 6 and the adjacent inner support ring 7; the drain pipe, the first baffle 5, the second baffle 6, the two inner support rings 7 and the two inner liquid sacs 8 cooperate together to form a test cavity; the power cavity 101 can be filled with liquid media such as hydraulic oil.

[0042] See Figures 1-4 , and it further includes: two outer support rings 16, which are respectively fixedly connected to the opposite sides of the first baffle 5 and the second baffle 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 communicated with the adjacent power cavity 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.

[0043] In the above solution, it is intended to use the outer liquid sac 17 to cooperate with the inner liquid sac 8 to form a double-layer seal for the drain pipe, improve the sealing performance of the drain pipe during the test, and on the other hand, 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 both ends of the drain pipe and reduce the interference of other forces on the test results; annular inclined surfaces can be arranged 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.

[0044] See Figure 4 , and it further includes: a pressure valve 19, which is fixedly connected and communicated with the connecting pipe 13; in the direction from the self-filling pipe 15 to the connecting pipe 13, the thickness of the base 1 gradually increases.

[0045] In the above solution, it aims to solve the problem that during the existing test, when the water pressure in the test cavity (the pressurization stage is the stage where the water pressure continuously rises) reaches a predetermined value (this value is determined according to the material of the drain pipe and the application environment, and in this solution, this value is taken as 0.1 MPa), stop injecting water into the test cavity (this is the pressure-holding stage at this time), and wait for a predetermined time (the length of this time is determined according to the material of the drain pipe and the application environment, and in this solution, this time is ten minutes). During the pressure-holding stage, part of the water in the test cavity seeps into the drain pipe, causing the water pressure in the test cavity to decrease, which easily leads to the failure to detect potential defects in the drain pipe. This solution adopts the method of continuously injecting water into the test cavity, and uses the pressure valve 19 to discharge the excess water in the test cavity in real time, and maintains the water pressure in the test cavity to be stable. In the direction from left to right, the thickness of the base 1 gradually increases, so that during the test of the drain pipe, 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 arranged at the lower part of the first baffle 5, which is used to drain the water in the test cavity after the test is completed.

[0046] See Figures 3-5 It also includes: a collecting shell 20, fixedly connected to one end of the connecting pipe 13 close to the first baffle 5. A cavity 202 and a collecting cavity 201 communicating with the outside are arranged in the collecting shell 20, and the collecting cavity 201 communicates with the connecting pipe 13.

[0047] During the above process, it aims to use the collecting shell 20 to guide the gas in the test cavity to be quickly discharged. Both the collecting shell 20 and the connecting pipe 13 are made of elastic materials. Before the drain pipe is fixed and the liquid level in the test cavity does not contact the collecting shell 20, the collecting shell 20 drives the left part of the connecting pipe 13 to bend downward under its own gravity, so that the collecting shell 20 is located inside the inner support ring 7, without hindering 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 cavity 201 connects the test cavity and the connecting pipe 13. After the liquid level in the test cavity submerges the collecting shell 20, the buoyancy provided by the cavity 202 for 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 fits against the inner side of the drain pipe, and the gas inside the drain pipe is guided into the connecting pipe 13 through the collecting cavity 201.

[0048] See Figures 6-9 It also includes: a swinging member 21, sealingly and rotatably connected to one end of the liquid injection pipe 15 close to the second baffle 6. It also includes: a power wheel 22, fixedly connected to the swinging member 21. A plurality of arc-shaped flow channels 221 are arranged in the power wheel 22, and the arc-shaped flow channels 221 communicate with 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.

[0049] In the above solution, it aims to solve the following problems: After water is injected into the test chamber, due to the rough inner wall of the drain pipe, the resistance suffered by the gas when moving along the inner wall is large, resulting in incomplete discharge of the gas in the test chamber. The position where the gas accumulates in the test chamber will form a local high pressure, leading to uneven pressure on the inner walls of each part of the drain pipe; the dissolved gas in the water of the test chamber is likely 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 near the impurities, the gas will accumulate on the surface of the impurities and finally form bubbles), resulting in the problem that bubbles still appear in the test chamber during the pressure-holding stage; on the one hand, this solution controls the spraying direction of the water flow in the test chamber through the swing member 21, making the water in the test chamber present a fluctuating state, promoting the movement of the bubbles at the top of the inner wall of the drain pipe. On the other hand, it guides the flow of the water in the test chamber through the swing member 21, and uses the impact of the water flow to drive the bubbles accumulated at the top of the inner wall of the drain pipe to the right, promoting the bubbles to enter the connecting pipe 13; the end of the swing member 21 can be flat to increase the width of the water flow sprayed by the swing member 21; the sum of the flow areas of all the arc-shaped channels 221 is smaller than the flow area of the swing member 21, so that most of the water is sprayed into the test chamber through the swing member 21, and a small part of the water enters the test chamber from the arc-shaped channels 221; in the clockwise direction, the distance between the arc-shaped channels 221 and the central axis of the power wheel 22 gradually decreases. Through the guidance of the arc-shaped channels 221, there is an included angle between the connection line between the end of the arc-shaped channels 221 and the central axis of the power wheel 22 and the water flow direction sprayed from the arc-shaped channels 221.

[0050] Since the resistance of air to the flow of water is less than the resistance of water to the flow of water, before the water in the test chamber submerges the power wheel 22, the power wheel 22 is in a static state under the action of the gravity of the swing member 21. When the water in the test chamber does not submerge the power wheel 22, the water sprayed from the arc-shaped channels 221 is resisted by the water in the test chamber, so that the water sprayed from the arc-shaped channels 221 pushes the power wheel 22 to rotate clockwise; initially, the swing member 21 faces downward under its own gravity, so that the water sprayed from the swing member 21 collides with the bottom of the test chamber under the action of the initial velocity and the acceleration of gravity. Through the collision of the water flow, the discharge of the dissolved gas in the water is promoted, the content of the dissolved gas in the water is reduced, and then the volume of the bubbles in the test chamber during the test is reduced. At the same time, during the pressurization stage, by continuously injecting water into and draining water from the test chamber, the discharge of the bubbles in the test chamber during the pressurization stage is promoted. Until the water pressure in the test chamber reaches the predetermined value, it enters the pressure-holding stage. At this time, water is slowly injected into the test chamber through the liquid injection pipe 15. On the one hand, the stability of the water pressure in the test chamber is maintained, and on the other hand, the newly generated bubbles in the test chamber can be discharged in time.

[0051] See Figures 6-9, 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.

[0052] 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 Figure 9 ).

[0053] 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.

[0054] When the water in the test cavity submerges 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 water flow direction ejected by the swing member 21 does not pass through the annular side surface of the test cavity, the water flow ejected by the swing member 21 collides with the baffle 24. As the swing member 21 rotates, the direction of the water flow ejected by the swing member 21 is perpendicular to the first baffle 5. At this time, the water flow ejected by the swing member 21 collides with the first baffle 5. Subsequently, the swing member 21 continues to rotate, driving the bubbles in the upper part of the test cavity to the right. The water pressure in the test cavity gradually reaches the set value (i.e., 0.1 MPa, the pressurization stage ends and the pressure holding stage begins). At this time, the liquid injection pipe 15 slowly injects water into the test cavity, and the water pressure in the test cavity gradually becomes greater than the set value. At this time, the pressure valve 19 opens, and the excess water in the test cavity is discharged through the collection cavity 201, the connecting pipe 13, and the pressure valve 19 to maintain the stability of the pressure in the test cavity. At the same time, during the process of the water flow discharging from the test cavity, it will drive the newly generated bubbles to move to the right, and finally the bubbles are discharged through the collection cavity 201, the connecting pipe 13, and the exhaust valve 14 until the test ends. Stop injecting water into the liquid injection pipe 15, and drain the water in the test cavity through the drain pipe. At this time, the tester observes whether there are cracks and water seepage marks on the surface of the drain pipe and records the observation data. Subsequently, the tester removes the drain pipe and repeats the above test steps until all the selected drain pipes in this batch have completed the test. According to the situation of all the drain pipes in this batch, it is determined whether the drain pipes in this batch are qualified.

[0055] As described above, only the preferred specific embodiments of the present invention are given, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and all 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) fixedly connected to the second baffle (6); an end of the connecting pipe (13) away from the first baffle (5) is fixedly connected to and connected to an exhaust valve (14); A liquid injection pipe (15) fixedly connected to the first baffle (5); Also includes: 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).

2. 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).

3. The internal water pressure test device for concrete and reinforced concrete drainage pipes according to claim 2, characterized in that: In the direction from the injection pipe (15) to the connecting pipe (13), the thickness of the base (1) gradually increases.

4. The internal water pressure test device for concrete and reinforced concrete drainage pipes according to claim 3, 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).

5. 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).

6. The internal water pressure test device for concrete and reinforced concrete drainage pipes according to claim 5, 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).

7. The internal water pressure test device for concrete and reinforced concrete drainage pipes according to claim 6, 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).

8. The internal water pressure test device for concrete and reinforced concrete drainage pipes according to claim 5, 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).

9. The internal water pressure test device for concrete and reinforced concrete drainage pipes according to claim 8, 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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