CN219284881U - Water pressure testing machine - Google Patents

Abstract

The utility model provides a water pressure testing machine, which relates to the technical field of water pressure testing and comprises a machine body, wherein the machine body is provided with a water tank suitable for accommodating a pipe body to be tested; the two mounting seats are arranged in the water tank at intervals; the sliding seat can move along the length direction of the water tank; the plugging assembly is arranged on the sliding seat and used for sealing the pipe orifice of the pipe body, the plugging assembly comprises a supporting rod extending out of the front side surface of the sliding seat, a sleeve block is sleeved outside the supporting rod, and an elastic sealing ring is arranged in an annular groove formed by the sleeve block and the supporting rod; after the pipe body to be measured is placed in the water tank, water in the water tank can quickly enter the pipe body, the blocking assembly is used for sealing the two ends of the pipe body, high-pressure water is injected from the water injection hole of the supporting rod, whether the pipe body leaks water is judged by observing pointer changes of the pressure gauge, the water pressure testing efficiency of the pipe body is improved, and the pipe body water pressure testing device has the advantages of being simple to operate and low in manufacturing cost.

Description

Water pressure testing machine

Technical Field

The utility model relates to the technical field of water pressure testing, in particular to a water pressure testing machine which is simple to operate, low in manufacturing cost and high in testing efficiency.

Background

The spiral fin tube is a high-efficiency heat transfer element with spiral fins, the heat transfer area of the spiral fin tube is several times of that of a light tube, the heat transfer can be enhanced, the flow resistance is reduced, and the metal consumption is reduced, so that the economical efficiency and the operation reliability of heat exchange equipment are improved, the spiral fin tube is widely applied to boilers, the high-frequency welding spiral fin tube is used as the heat exchange element, the heat resistance is large, the heat exchange efficiency is low, and the integral spiral fin tube formed by rolling has the advantages of high heat transfer efficiency, difficult ash accumulation and the like.

For example, CN211528079U discloses a spiral pipe hydrostatic test machine, the water pressing device includes two sliding guide rails and a water injection tank and an exhaust plate which are arranged on the sliding guide rails in a sliding way, a water injection pipe is fixed on the water injection tank, an exhaust pipe is fixed on the exhaust plate, two receiving rollers are rotatably arranged on a base, the receiving rollers are positioned between the two sliding guide rails, low-pressure water is injected into a test tube to be tested and exhausted through the exhaust pipe 6 through the water pipe 5, a locking valve 7 is closed after the exhaustion is completed, high-pressure water is injected into the test tube to be tested by the water injection pipe 5 and pressure is maintained, namely, the steps of injecting low-pressure water, opening the locking valve, closing the exhaust valve after the water injection is completed are needed, and injecting high-pressure water are complex, so that the water injection process is complicated, and the test efficiency of the test tube to be tested is reduced.

Disclosure of Invention

The utility model aims to provide a water pressure testing machine, and aims to solve the problems that in the prior art, the water injection process of the water pressure testing machine is complex, and the testing efficiency of a test tube to be tested is reduced.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the hydraulic pressure testing machine comprises a machine body, wherein the machine body is provided with a water tank suitable for accommodating a pipe body to be tested; the two mounting seats are arranged in the water tank at intervals; the sliding seat can move along the length direction of the water tank; the plugging assembly is arranged on the sliding seat and used for sealing the pipe orifice of the pipe body, the plugging assembly comprises a supporting rod extending out from the front side surface of the sliding seat, a sleeve block is sleeved outside the supporting rod, an elastic sealing ring is arranged in an annular groove formed by the sleeve block and the supporting rod, and a water injection hole is further formed in the supporting rod; the axial driving device is used for driving the support rod or the sleeve block along the axial direction of the support rod to generate extrusion force on the elastic sealing ring so as to seal the pipe orifice of the pipe body; and the moving driving device is used for driving the sliding seat to advance or retreat along the direction of the water tank, when the sliding seat advances along the direction of the water tank, the supporting rod stretches into the pipe orifice of the pipe body, and when the sliding seat retreats along the direction of the water tank, the supporting rod is separated from the pipe orifice of the pipe body.

According to a further technical scheme, the axial driving device comprises a driving source, a driving bevel gear arranged on the driving source, a driven bevel gear meshed with the driving bevel gear, external threads are arranged on the outer surface of at least one part of the supporting rod, the driven bevel gear is provided with an internal threaded hole matched with the external threads of the supporting rod, and the axial driving device further comprises a first limiting structure used for limiting the rotation of the supporting rod.

According to a further technical scheme, the sliding seat is provided with a sliding hole in sliding fit with the supporting rod, and the supporting rod extends out of the front side face of the sliding seat through the sliding hole.

According to a further technical scheme, the first limiting structure comprises a strip hole formed along the length direction of the support rod, the sliding seat is provided with an inserting rod extending into the strip hole, and when the support rod moves axially, the inserting rod can move reciprocally at the positions of the two ends of the strip hole.

According to a further technical scheme, the axial driving device further comprises a bearing, wherein the bearing is arranged between the rear side face of the sliding seat and the driven bevel gear, so that rollers on one side of the bearing can be contacted with one side of the driven bevel gear, and friction resistance to rotation of the driven bevel gear is reduced.

According to a further technical scheme, a sleeve piece is arranged between the bearing and the rear side face of the sliding seat, so that the roller on the other side of the bearing can be directly contacted with the side face of the sleeve piece.

According to a further technical scheme, the mobile driving device comprises a fixed block, a first connecting rod connected to the fixed block, a first hinging piece rotatably installed on the first connecting rod, a second connecting rod rotatably installed at one end of the first hinging piece, a second hinging piece rotatably connected with the second connecting rod, and a holding part installed on the first hinging piece, wherein the other end of the second hinging piece is hinged with a sliding seat.

According to a further technical scheme, the hinge assembly further comprises a second limiting structure used for limiting the upward rotation of the first hinge.

According to a further technical scheme, the second limiting structure comprises a limiting groove and a limiting block which can be clamped into or separated from the limiting groove, when the limiting block is clamped into the limiting groove, the second limiting structure is in a limiting state, and when the limiting block is separated from the limiting groove, the second limiting structure is in a releasing limiting state.

According to the further technical scheme, a mounting plate is arranged between the first connecting rod and the second connecting rod, a screwing element is rotatably arranged on the mounting plate, the screwing element is connected with a limiting block, and the limiting block is clamped into or separated from a limiting groove under the driving of the screwing element.

According to a further technical scheme, the guide rod is arranged along the length direction of the water tank, the sliding seat is provided with a first guide hole in sliding fit with the guide rod, the mounting seat is provided with a second guide hole in sliding fit with the guide rod, and the mounting seat can slide along the direction of the guide rod, so that pipes with different lengths can be tested, and the device further comprises a fixing assembly for limiting the backward movement of the mounting seat.

According to a further technical scheme, the fixing assembly comprises a first connecting member, a second connecting member and a locking piece, wherein the second connecting member is provided with a first semicircular hole, the second connecting member is provided with a second semicircular hole, and the locking piece is used for sleeving and fixing the first connecting member and the second connecting member on the guide rod.

The beneficial effects of the utility model are as follows:

1. after the pipe body to be measured is placed in the water tank, water in the water tank can quickly enter the pipe body, the blocking assembly is used for sealing the two ends of the pipe body, high-pressure water is injected from the water injection hole of the supporting rod, whether the pipe body leaks water is judged by observing pointer changes of the pressure gauge, the water pressure testing efficiency of the pipe body is improved, and the pipe body water pressure testing device has the advantages of being simple to operate and low in manufacturing cost.

2. When the elastic sealing ring is severely worn, the driven bevel gear, the bearing, the sleeve piece and the sleeve block are sequentially taken out by opening the cover plate, so that the elastic sealing ring or parts in the plugging assembly can be conveniently replaced.

3. Through setting up the upward rotation of second limit structure restriction first hinge, avoid the thrust that the high-pressure water that pours into from the water injection hole of bracing piece produced, the problem that the sliding seat moved backward appears.

4. Through changing the position of mount pad, sliding seat and fixed subassembly, can test the body of different length.

Drawings

FIG. 1 is a perspective view of the body of the present utility model;

FIG. 2 is a schematic perspective view of a slide mount and a mounting base according to the present utility model;

FIG. 3 is a schematic perspective view of a sliding seat according to the present utility model;

FIG. 4 is a rear view of the slide mount of the present utility model;

FIG. 5 is a perspective view of another view of the slide mount of the present utility model;

FIG. 6 is a schematic perspective view of a closure assembly of the present utility model;

FIG. 7 is a schematic view of an exploded structure of a sliding seat according to the present utility model;

FIG. 8 is a schematic view of an exploded view of a slide mount according to another aspect of the present utility model;

FIG. 9 is a perspective view of another view of the slide mount and mount of the present utility model;

FIG. 10 is a schematic view showing a structure of the sliding seat of the present utility model in a state of moving backward;

FIG. 11 is a schematic side elevational view of FIG. 10 in accordance with the present utility model;

FIG. 12 is a schematic perspective view of a second spacing structure of the present utility model;

FIG. 13 is a schematic side view of a second spacing structure of the present utility model;

FIG. 14 is a schematic view showing a second limiting structure of the present utility model in a state of releasing the limiting;

FIG. 15 is a schematic view of a second limiting structure of the present utility model in a limiting state;

fig. 16 is a schematic exploded view of the fastening assembly of the present utility model.

In the figure: 10. a body; 11. a water tank; 12. a guide rod; 20. a sliding seat; 20a, front side; 20b, rear side; 21. a first guide hole; 22. a cover plate; 23. a plugging assembly; 231. a support rod; 2311. an end portion; 2312. an external thread; 2313. a slit hole; 2314. a water injection hole; 232. sleeving blocks; 233. an annular groove; 234. an elastic sealing ring; 24. a slide hole; 25. a rod; 26. a jack; 30. a mounting base; 31. a connecting block; 32. a limit groove; 33. a rotating element; 34. a limiting block; 35. a mounting plate; 40. an axial drive device; 41. a handle; 42. a drive bevel gear; 43. a driven bevel gear; 431. an internal threaded hole; 44. a bearing; 45. a sleeve member; 50. a movement driving device; 51. a fixed block; 511. a second guide hole; 52. a first connecting rod; 53. a first hinge; 54. a second connecting rod; 55. a second hinge; 56. a pin shaft; 57. a grip portion; 60. a fixing assembly; 61. a first connecting member; 611. a first semicircle orifice; 612. a mounting hole; 62. a second connecting member; 621. a second semicircular hole; 622. bolt holes; 63. a locking piece.

Detailed Description

The following describes the embodiments of the present utility model further with reference to the drawings.

As shown in fig. 1, the hydraulic pressure testing machine comprises a machine body 10, wherein the machine body 10 is provided with a water tank 11 for accommodating a pipe body, sliding seats 20 are arranged in the water tank 11 near the two ends of the water tank, so that the pipe body is arranged between two mounting seats 30, the mounting seats 30 are provided with the sliding seats 20, a guide structure is arranged between the sliding seats 20 and the water tank 11, the sliding seats 20 can slide along the length direction of the water tank relative to the mounting seats 30 and the water tank, and optionally, a guide rod 12 is fixedly arranged in the water tank 11, and the sliding seats 20 are provided with first guide holes 21 in sliding fit with the guide rod 12;

referring to fig. 2 to 8, a cover plate 22 is detachably mounted on the top of the sliding seat 20 through a fastener, a blocking assembly 23 is provided on the sliding seat 20 so as to seal the nozzles at both ends of the pipe body, alternatively, the blocking assembly 23 includes a support rod 231 extending out of the sliding seat 20, an end 2311 of the support rod 231 may extend into the inside of the nozzle of the pipe body, that is, the diameter of the end 2311 of the support rod 231 is slightly smaller than the diameter of the nozzle of the pipe body, a socket piece 232 is sleeved outside the support rod 231, and the socket piece 232 may slide along the axial direction of the support rod 231, one end of the socket piece 232 abuts against the front side 20a of the sliding seat 20, an annular groove 233 is formed between the other end and the end of the support rod 231 so as to sleeve an elastic sealing ring 234 inside the annular groove 233, the elastic sealing ring 234 may be made of rubber, silica gel or the like, and the diameter of the socket piece 232 is the same as the diameter of the end 2311 of the support rod 231, so that the end face of the pipe body can be contacted on the front side 20a of the sliding seat 20 when the pipe body is hydraulically tested.

Referring to fig. 4, the sliding seat 20 is provided with an axial driving device 40, so that the supporting rod 231 and the sleeve block 232 co-extrude the elastic sealing ring 234, and therefore, the elastic sealing ring 234 is expanded and fully contacts with the inner circumferential wall of the pipe orifice of the pipe body, so as to seal the pipe orifices at two ends of the pipe body, and when high-pressure water is injected into the pipe orifice of the pipe body, the tightness of the joint of the pipe orifice of the pipe body and the supporting rod 231 is improved, and the following needs to be emphasized: in order to compress the elastic sealing ring 234, one of the supporting rod 231 and the sleeve block 232 is relatively static, and the other relatively moves to generate compression force on the elastic sealing ring 234, or the supporting rod 231 and the sleeve block 232 move together to compress the elastic sealing ring 234.

In this embodiment, one end of the sleeve block 232 abuts against the front side 20a of the sliding seat 20, when the pipe orifice of the pipe body is sealed, the sleeve block 232 is relatively static under the limitation of the front side 20a of the sliding seat 20, and the axial driving device 40 on the cover plate is used for driving the supporting rod 231 to move along the axial direction of the supporting rod towards the sleeve block 232, so as to generate extrusion force on the elastic sealing ring 234;

referring to fig. 4 and 7, the axial driving device 40 includes a handle 41 rotatably installed on the cover plate 22, a drive bevel gear 42 installed on the handle 41, a driven bevel gear 43 engaged with the drive bevel gear 42, an external screw 2312 provided on at least a portion of an outer surface of the support bar 231, the driven bevel gear 43 having an internal screw hole 431 engaged with the external screw 2312, the slide base 20 having a slide hole 24 slidably engaged with the support bar 231, the support bar 231 protruding from the front side 20a of the slide base 20 through the slide hole 24, and of course, the handle 41 may also automatically drive the drive bevel gear 42 to rotate using a motor as a driving source.

When the driving handle 41 rotates, in order to enable the supporting rod 231 to move along the axial direction thereof, the sliding seat 20 and the supporting rod 231 are further provided with a first limiting structure to prevent the supporting rod 231 from rotating along with the driven bevel gear 43, optionally, the first limiting structure comprises a long strip hole 2313 formed along the length direction of the supporting rod 231, the sliding seat 20 is provided with an inserting rod 25, when the supporting rod 231 moves axially, the inserting rod 25 can move back and forth between two ends of the long strip hole 2313, preferably, the sliding seat 20 is provided with an inserting hole 26 for inserting the inserting rod 25, and the inserting rod 25 and the inserting hole 26 can be connected in a jogged mode, a pluggable mode, a threaded mode and the like.

Referring to fig. 7, it is preferable that the axial driving device 40 further includes a bearing 44, the bearing 44 is disposed at a position between the rear side 20b opposite to the front side 20a of the sliding seat 20 and the driven bevel gear, rollers at both sides of the bearing 44 are respectively in contact with the rear side 20b of the sliding seat 20 and the driven bevel gear 43, thereby reducing friction resistance when the driven bevel gear 43 rotates, and a sleeve 45 is disposed between the bearing 44 and the rear side 20b of the sliding seat 20 in order to adjust the position of the driven bevel gear 43, so that the rollers at the other side of the bearing 44 can be directly contacted with the sleeve 45, and the sleeve 45 may have a circular shape in cross section, or may have a square, triangle or other various shapes having a hole in the middle.

When the bearing capacity of the spiral pipe and whether water leakage occurs are tested, the pipe body to be tested is placed in the water tank 11 and is positioned between the two sliding seats 20, the space between the two sliding seats 20 is shortened by moving at least one sliding seat 20 in the two sliding seats 20, when the supporting rods 231 on the two sliding seats 20 respectively extend into pipe openings at two ends of the pipe body, the supporting rods 231 are driven by the axial driving device 40 to move towards the sleeve blocks 232 and squeeze the elastic sealing rings 234 so as to seal the pipe openings at two ends of the pipe body, and with reference to fig. 6, water injection holes 2314 are formed in at least one supporting rod 231, so that high-pressure water is injected into the pipe body, and after the inside of the pipe body reaches the preset pressure, whether the water leakage occurs in the pipe body is judged by the pressure maintaining mode; for example, the water leakage phenomenon can be judged to occur by detecting the internal pressure of the pipe body, and optionally, high-pressure water is injected into the pipe body through the water injection hole 2314 on the support rod 231 by the electric pressure test pump, when the pressure is maintained, the pressure gauge on the electric pressure test pump can display the internal pressure of the pipe body in real time, when the water leakage phenomenon does not occur in the pipe body, the pointer of the pressure gauge can be stabilized, when the water leakage occurs in the pipe body, the pointer reading of the pressure gauge can be gradually reduced, namely, the internal pressure of the pipe body is gradually reduced, so that the water leakage of the pipe body is judged.

Referring to fig. 9 to 11, the mounting base 30 is provided with a movement driving device 50 for driving the sliding base 20 to move along the length direction of the water tank, so that the supporting rod 231 on the sliding base 20 extends into the pipe opening of the pipe body or the supporting rod 231 is separated from the pipe opening of the pipe body, and the movement driving device 50 can drive the sliding base 20 to move along the length direction of the water tank in an automatic manner by using components such as an electric push rod, an air cylinder or a hydraulic cylinder;

in the present embodiment, the moving driving device 50 includes a fixed block 51 fixed to the mount 30 at a distance, a first connection rod 52 fixed between the two fixed blocks 51, a first hinge 53 rotatably installed on the first connection rod 52, a second connection rod 54 rotatably installed at one end of the first hinge 53, a second hinge 55 rotatably connected to the second connection rod 54, the other end of the second hinge 55 being hinged to the slide base 20 through a pin 56, and a grip 57 installed on the first hinge 53, whereby the slide base 20 is manually driven to advance or retreat by rotating the grip 57 counterclockwise; when the sliding seat 20 advances, one end of the supporting rod 231 extends into the pipe orifice of the pipe body, and meanwhile, the end face of the pipe body is abutted against and contacted with the front side face 20a of the sliding seat 20 so as to seal the pipe orifice;

when high-pressure water is injected into the pipe body, in order to prevent the sliding seat 20 from moving backwards under the thrust of the high-pressure water, the second limiting structure is arranged to limit the upward rotation of the first hinge piece 53, so that the problem of backward movement of the sliding seat 20 is avoided when the sliding seat is in a pressure-maintaining state;

referring to fig. 12 to 15, the second limiting structure includes a connection block 31 fixed on the mounting base 30, the connection block 31 is L-shaped and forms a limiting groove 32 with the mounting base 30, the connection block 31 may also be U-shaped, F-shaped, etc. with the limiting groove 32, a mounting plate 35 is separately provided between the first connection rod 52 and the second connection rod 54, two ends of the mounting plate 35 are respectively provided with a connection hole rotationally matched with the first connection rod 52 and the second connection rod 54, a rotating element 33 is rotatably mounted on the mounting plate 35, the rotating element 33 penetrates the mounting plate 35, and a limiting block 34 is fixedly mounted at the lower end of the rotating element 33, the second limiting structure is in a limiting state or a releasing limiting state by rotating the rotating element 33, when the second limiting structure is in the limiting state, the limiting block 34 is clamped into the inside the limiting groove 32 to limit the upward rotation of the mounting plate 35, and when the second limiting structure is in the releasing limiting state, the limiting block 34 is separated from the limiting groove 32, thereby enabling one end of the supporting rod 231 to be separated from the pipe opening of the pipe body by rotating the first hinge 53 upward through the holding part 57.

For testing the pipe bodies with different lengths by water pressure, at least one mounting seat 30 can slide along the length direction of the water tank 11, for example, a second guide hole 511 which is in sliding fit with the guide rod 12 is formed in the fixed block 51, and a fixing assembly 60 is arranged on the machine body 10 to limit the sliding of one mounting seat 30 in a direction away from the other mounting seat 30;

referring to fig. 9 and 16, the fixing assembly 60 includes a first connection member 61, a second connection member 62 and a locking part 63, the second connection member 62 has a first semicircular hole 611, the second connection member 62 has a second semicircular hole 621, the combined circular hole formed by the two parts enables the fixing assembly 60 to be sleeved on the guide rod 12, specifically, the locking part 63 is a bolt, a mounting hole 612 is provided on the first connection member 61, a bolt hole 622 matched with the bolt is provided on the second connection member 62, the bolt passes through the mounting hole 612 and is in screw connection with the bolt hole 622, the fixing assembly 60 can be fixed on the guide rod 12, the mounting seat 30 is slid forward, the fixing assembly 60 is locked at a position corresponding to the rear side surface of the fixing block 51 by disassembling the bolt, and therefore, the distance between the two sliding seats 20 can be adjusted according to the length of the test tube to be tested.

The working principle of the utility model for testing whether the spiral pipe leaks water is as follows:

step one: the pipe body to be tested is arranged in the water tank 11 and positioned between the two sliding seats 20, and the supporting rods 231 on the two sliding seats 20 respectively extend into the pipe orifices at the two ends of the pipe body through the moving driving device 50;

step two: the support rod 231 is driven to move towards the sleeve block 232 by the axial driving device 40 and presses the elastic sealing ring 234 so as to seal the pipe orifices at the two ends of the pipe body;

step three: the rotating element 33 is rotated, so that the limiting block 34 is clamped into the limiting groove 32, and the second limiting structure is in a limiting state to limit the upward rotation of the mounting plate 35, and the sliding seat 20 is prevented from moving backwards;

step four: high-pressure water is injected into the pipe body through the water injection hole 2314 on the support rod 231, and after the inside of the pipe body reaches a preset pressure, pressure maintaining is performed to judge whether water leakage occurs in the pipe body;

step five: after the pressure maintaining is finished, the limiting block 34 is separated from the limiting groove 32 by screwing the rotating element 33, so that the second limiting structure is in a state of releasing the limiting,

step six: one end of the support bar 231 is separated from the nozzle of the pipe body by rotating the first hinge member 53 upward through the grip portion 57;

step seven: the pipe body is lifted up and separated from the water tank 11 by the existing lifting device.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims (12)

1. The hydraulic pressure test machine, its characterized in that includes:

the machine body is provided with a water tank suitable for accommodating a pipe body to be tested;

the two mounting seats are arranged in the water tank at intervals;

the sliding seat can move along the length direction of the water tank;

the plugging assembly is arranged on the sliding seat and used for sealing the pipe orifice of the pipe body, the plugging assembly comprises a supporting rod extending out from the front side surface of the sliding seat, a sleeve block is sleeved outside the supporting rod, an elastic sealing ring is arranged in an annular groove formed by the sleeve block and the supporting rod, and a water injection hole is further formed in the supporting rod;

the axial driving device is used for driving the support rod or the sleeve block along the axial direction of the support rod to generate extrusion force on the elastic sealing ring so as to seal the pipe orifice of the pipe body; a kind of electronic device with high-pressure air-conditioning system

The movable driving device is used for driving the sliding seat to advance or retreat along the direction of the water tank, when the sliding seat advances along the direction of the water tank, the supporting rod stretches into the pipe orifice of the pipe body, and when the sliding seat retreats along the direction of the water tank, the supporting rod is separated from the pipe orifice of the pipe body.

2. The hydraulic pressure testing machine according to claim 1, wherein the axial driving device comprises a driving source, a driving bevel gear installed on the driving source, a driven bevel gear engaged with the driving bevel gear, an external thread is provided on an outer surface of at least a portion of the support rod, the driven bevel gear has an internal thread hole engaged with the external thread of the support rod, and the hydraulic pressure testing machine further comprises a first limit structure for limiting the rotation of the support rod.

3. The hydraulic testing machine according to claim 2, wherein the slide base has a slide hole slidably fitted with a support rod, and the support rod is extended from a front side of the slide base through the slide hole.

4. The hydraulic pressure testing machine according to claim 2, wherein the first limiting structure comprises a long strip hole formed along the length direction of the support rod, the sliding seat is provided with a plug rod extending into the long strip hole, and when the support rod moves axially, the plug rod can move reciprocally at the positions of the two ends of the long strip hole.

5. The hydraulic pressure testing machine according to any one of claims 2 to 4, wherein the axial driving means further comprises a bearing provided between the rear side surface of the slide seat and the driven bevel gear, so that a roller on one side of the bearing can contact one side of the driven bevel gear to reduce frictional resistance to rotation of the driven bevel gear.

6. The hydrostatic testing machine of claim 5, wherein a sleeve is disposed between the bearing and the rear side of the slide block such that the rollers on the other side of the bearing can directly contact the side of the sleeve.

7. The hydraulic pressure testing machine according to any one of claims 1 to 4, wherein the moving driving means includes a fixed block, a first connecting rod connected to the fixed block, a first hinge rotatably installed on the first connecting rod, a second connecting rod rotatably installed at one end of the first hinge, a second hinge rotatably connected to the second connecting rod, the other end of the second hinge being hinged to the sliding seat, and a grip installed on the first hinge.

8. The hydrostatic testing machine of claim 7, further comprising a second limiting structure for limiting upward rotation of the first hinge member.

9. The hydraulic pressure testing machine according to claim 8, wherein the second limiting structure comprises a limiting groove and a limiting block which can be clamped into or separated from the limiting groove, the second limiting structure is in a limiting state when the limiting block is clamped into the limiting groove, and the second limiting structure is in a releasing limiting state when the limiting block is separated from the limiting groove.

10. The hydraulic pressure testing machine according to claim 9, wherein a mounting plate is arranged between the first connecting rod and the second connecting rod, a screwing element is rotatably mounted on the mounting plate, the screwing element is connected with a limiting block, and the limiting block is clamped into or separated from the limiting groove under the driving of the screwing element.

11. The hydraulic testing machine according to any one of claims 1 to 4, wherein a guide bar is provided along a length direction of the water tank, the slide holder has a first guide hole slidably fitted with the guide bar, and the mount holder has a second guide hole slidably fitted with the guide bar, so that the mount holder can slide along the direction of the guide bar to test different lengths of pipe, and further comprising a fixing assembly to restrict rearward movement of the mount holder.

12. The hydraulic testing machine of claim 11, wherein the securing assembly includes a first connecting member having a first semicircle aperture, a second connecting member having a second semicircle aperture, and a retaining member for securing the first and second connecting members to the guide bar.

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