Quartz pipe pressure resistance test pipe joint, test assembly and test method

Abstract

The invention provides a quartz pipe pressure resistance test pipe joint, a test assembly and a test method, and belongs to the technical field of pipe joints, the quartz pipe pressure resistance test pipe joint comprises a pressing cover, a base and a sealing assembly, the pressing cover and the base are sequentially arranged at the end of a quartz pipe in a sleeving mode, and one end of the base is provided with a containing groove extending in the axial direction; a groove opening of the containing groove faces the pressing cover, a radial hole is formed in the side wall of the base, and the radial hole communicates with an inner cavity of the containing groove; the sealing assembly comprises a first sealing ring, the first sealing ring is used for being arranged on the outer side of the quartz tube in a sleeving mode and located between the base and the pressing cover, and the pressing cover is arranged on the outer side of the base in a sleeving mode from the notch direction of the base and presses the first sealing ring between the end opening of the base and the quartz tube. According to the quartz tube pressure resistance test tube joint provided by the invention, the interference of axial force application on a pressure test result is reduced; the problems that end face sealing is not tight, and water leakage is prone to occurring are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of pipe joints, and more specifically, relates to a quartz pipe pressure test pipe joint, a test assembly and a test method. Background Art

[0002] During the production process, the quartz tube needs to be tested for its pressure resistance. At present, a basic judgment can be made by observing the stress distribution of the tube after forming and whether there are scratches on the outer wall surface, or by conducting a liquid pressure test on the tube in the laboratory. When using a liquid pressure test, a test assembly is required. The test assembly includes pipe joints installed at both ends of the quartz tube. The two pipe joints are connected to the liquid inlet pipe and the liquid outlet pipe respectively. The liquid enters the interior of the quartz tube from the liquid inlet pipe, and the liquid pressure continues to increase. After increasing to the value required by the specification, the quartz tube is not broken, which means that the quartz tube has passed the pressure test.

[0003] There are the following problems: 1. For quartz tubes of different specifications, it is necessary to replace the corresponding test pipe joints. Frequent replacement of pipe joints is cumbersome; 2. During the pressure test, the end of the quartz tube is against the inner cavity of the pipe joint and sealed with the help of the J-shaped first sealing ring at the end. This sealing method is affected by the flatness of the end surface and is prone to water leakage during the test. It takes a long time for the liquid pressure to rise to the specified pressure value, and the efficiency is low. Summary of the invention

[0004] The object of the present invention is to provide a quartz tube pressure test pipe joint, a test assembly and a test method, aiming to solve the problem of poor sealing effect of the pipe joint.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: to provide a quartz tube pressure test pipe joint, including a clamping cover, a base and a sealing assembly, the clamping cover and the base are sequentially sleeved on the end of the quartz tube, one end of the base is provided with an axially extending receiving groove, the notch of the receiving groove faces the clamping cover, and a radial hole is provided on the side wall of the base, and the radial hole is connected with the inner cavity of the receiving groove; the sealing assembly includes a first sealing ring, the first sealing ring is used to be sleeved on the outside of the quartz tube, and the first sealing ring is located between the base and the clamping cover, the clamping cover is sleeved on the outside of the base from the notch direction of the base and presses the first sealing ring between the port of the base and the quartz tube.

[0006] As another embodiment of the present application, a connecting groove is formed at one end of the clamping cover close to the base, and an inner side wall of the connecting groove is connected to the base to clamp the first sealing ring.

[0007] As another embodiment of the present application, the clamping cover is threadably matched with the base.

[0008] As another embodiment of the present application, the notch of the base has an annular clearance gap, and the first sealing ring is located at the clearance gap.

[0009] As another embodiment of the present application, the base includes a base body and an inner sealing ring, one end of the inner sealing ring is inserted into the receiving groove of the base body and fits with the receiving groove, the other end of the inner sealing ring has a flange structure extending outward, the flange structure overlaps the open end of the base, and a second sealing ring is provided between the inner sealing ring and the base; the inner side wall of the inner sealing ring fits on the outer side wall of the quartz tube; The compression cover further comprises a cover body and a sealing plate, wherein the cover body is connected to the base body; the sealing plate is located at the bottom of the connecting groove, and a through hole for accommodating the passage of the quartz tube is opened in the middle of the sealing plate, and the sealing plate is adapted to the inner sealing ring; The cover body is connected to the base body for pressing the first sealing ring and the second sealing ring.

[0010] As another embodiment of the present application, there are multiple inner sealing rings, and the multiple inner sealing rings are sequentially sleeved on the groove ends of the base, and a second sealing ring is provided between two adjacent inner sealing rings; the number of the sealing pressure plate is one, and the sealing pressure plate is adapted to the inner sealing ring with the smallest inner diameter.

[0011] As another embodiment of the present application, a connection between the inner side wall of the inner sealing ring and the upper end surface of the flange structure has a chamfered surface.

[0012] As another embodiment of the present application, one end of the radial hole close to the outer side wall of the base has a threaded section.

[0013] The beneficial effects of the quartz tube pressure test pipe joint provided by the present invention are as follows: compared with the prior art, the quartz tube pressure test pipe joint of the present invention modifies the original end seal to seal the outer side of the quartz tube through the cooperation of the base and the compression cover, thereby avoiding the application of axial force to the quartz tube, thereby reducing the interference of the axial force on the pressure test result; the outer circumferential sealing of the quartz tube is solved by the O-ring, which solves the problem of poor sealing of the tube end face and easy water leakage when the J-ring is used to seal the tube end face; and reduces the requirement for the horizontal degree of the tube end face, which is convenient for operation.

[0014] A quartz tube pressure test assembly is also provided, comprising the above-mentioned quartz tube pressure test pipe joint, wherein the two quartz tube pressure test pipe joints are respectively located at both ends of the quartz tube, wherein the radial holes of one of the quartz tube pressure test pipe joints are connected to the liquid inlet pipe, and the radial holes of the other quartz tube pressure test pipe joints are connected to the liquid outlet pipe.

[0015] The beneficial effects of the quartz tube pressure test assembly provided by the present invention are: compared with the prior art, the quartz tube pressure test assembly of the present invention adopts the above-mentioned pipe joint and has all the beneficial effects thereof; the outer side of the quartz tube is circumferentially sealed by an O-ring, which solves the problem of loose sealing and easy water leakage, thereby improving the test accuracy; and the requirements for the horizontality of the end face of the tube are reduced, thereby facilitating operation.

[0016] A quartz tube pressure test method is also provided, which uses the above-mentioned quartz tube pressure test pipe joint, and includes the following steps: S1. Determine the outer diameter of the pipe to be tested, determine the number of inner sealing rings to be installed and the sealing pressure plate of the inner sealing ring corresponding to the smallest inner diameter; S2. Install the liquid inlet pipe joint at one end of the pipe to be tested: The compression cover is installed on the end of the quartz tube; When the number of inner sealing rings is 0, the base is sleeved on the end of the quartz tube, and the pressing cover is moved in the opposite direction and connected to the base to limit the first sealing ring; When the number of inner sealing rings is 1, the sealing plate, the first sealing ring, the inner sealing ring, the second sealing ring and the base are sequentially sleeved on the end of the quartz tube, and the pressing cover is moved in the opposite direction and connected to the base to limit the first sealing ring and the second sealing ring; When the number of inner sealing rings is greater than 1, the sealing pressure plate and the first sealing ring are sequentially sleeved on the end of the quartz tube, and then several inner sealing rings and bases are sequentially installed on the rear side of the first sealing ring in ascending order according to the inner diameter of the inner sealing ring, and a second sealing ring is arranged between two adjacent inner sealing rings and between the inner sealing ring and the base, and the pressing cover is moved in the opposite direction and connected to the base to limit the first sealing ring and the second sealing ring; S3. Repeat step S2 at the other end of the pipe to be tested to install the liquid outlet pipe joint: S4, connecting the liquid inlet pipe to the liquid inlet pipe joint, and connecting the liquid outlet pipe to the liquid outlet pipe joint; S5. Open the liquid inlet pipe until the hydraulic pressure in the pipe to be tested reaches the value required by the specification or the test ends when the pipe to be tested ruptures; S6. Close the liquid inlet pipe and open the liquid outlet pipe.

[0017] The beneficial effects of the quartz tube pressure test method provided by the present invention are: compared with the prior art, the quartz tube pressure test method of the present invention adopts the above-mentioned pipe joint and has all the beneficial effects thereof; in addition, the test method can accurately verify the pressure resistance and pressure resistance limit of the quartz tube, the pressure rise time is significantly shortened, and the operation steps and time of the pressure test are greatly reduced, effectively improving the experimental efficiency of the experiment by nearly 50% or more. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic diagram of the structure of the quartz tube provided in an embodiment of the present invention when undergoing a pressure test; Figure 2 A schematic diagram of the connection structure between the pipe joint and the quartz pipe provided in the first embodiment of the present invention; Figure 3 A schematic diagram of the connection structure between a pipe joint and a quartz tube provided in a second embodiment of the present invention; Figure 4 This is a schematic diagram of the connection structure between a pipe joint and a quartz tube provided in the third embodiment of the present invention.

[0020] In the figure: 1. pipe; 2. cover body; 3. base body; 4. radial hole; 5. first sealing ring; 6. inner sealing ring; 7. second sealing ring; 8. sealing pressure plate. DETAILED DESCRIPTION

[0021] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0022] See also Figures 1 to 4, the quartz tube pressure test pipe joint, test assembly and test method provided by the present invention are now described. The quartz tube pressure test pipe joint includes a compression cover, a base and a sealing assembly. The compression cover and the base are sequentially sleeved on the end of the quartz tube. One end of the base is provided with an axially extending receiving groove, the notch of which faces the compression cover, and a radial hole 4 is provided on the side wall of the base, which is connected to the inner cavity of the receiving groove; the sealing assembly includes a first sealing ring 5, which is used to be sleeved on the outside of the quartz tube, and the first sealing ring 5 is located between the base and the compression cover. The compression cover is sleeved on the outside of the base from the notch of the base and presses the first sealing ring 5 between the port of the base and the quartz tube.

[0023] Compared with the prior art, the quartz tube pressure test pipe joint provided by the present invention modifies the original end seal to seal the outer side of the quartz tube through the cooperation of the base and the compression cover, thereby avoiding the application of axial force to the quartz tube 1, thereby reducing the interference of the axial force on the pressure test result; the outer circumferential sealing of the quartz tube is solved by the O-ring, which solves the problem of loose sealing and easy water leakage of the end face of the tube 1 sealed by the J-ring; and reduces the requirement for the horizontal degree of the end face of the tube 1, which is easy to operate.

[0024] The quartz tube is hereinafter referred to as tube 1.

[0025] like Figure 2 As shown, in the first embodiment, the pressing cover and the first sealing ring 5 are sequentially sleeved on the end of the pipe 1, and are moved along the axial direction of the pipe 1 to make way for the end of the pipe 1; then the notch position of the receiving groove of the base is sleeved on the end of the pipe 1 in the direction of the pressing cover, at which time the end of the pipe 1 is located at the bottom of the receiving groove, but it is not necessary to press the end against the bottom of the receiving groove; finally, the first sealing ring 5 and the pressing cover are moved in the opposite direction, the pressing cover and the base are tightly connected, the side wall of the pressing cover and the end face of the base clamp the first sealing ring 5, and at this time the first sealing ring 5 closes the notch of the receiving groove. The radial hole 4 is opened on the side wall of the base, which reduces the impact effect of the incoming liquid on the end of the pipe 1 and the first sealing ring 5, so that the pressure of the liquid in the pipe 1 and the receiving groove rises slowly, ensuring the stability of the test. In addition, a reinforcing block is installed at the tail end of the base, and the reinforcing block can be a cylindrical block, and the reinforcing block is used to strengthen the end face bearing capacity of the base. The center of the compression cover has a through hole, and the inner diameter of the through hole of the compression cover is consistent with the inner diameter of the slot of the base. During testing, the side wall of the through hole of the compression cover and the side wall of the first slot of the base are attached to the outer wall of the pipe 1.

[0026] A connecting groove is provided at one end of the clamping cover close to the base. When the clamping cover moves in the reverse direction, the connecting groove is sleeved on the end of the base, and the inner wall of the connecting groove is connected to the outer wall of the base so that the bottom of the connecting groove and the end face of the groove of the base can compress the first sealing ring 5.

[0027] Furthermore, the inner side wall of the connecting groove has an internal thread, and one end of the notch of the outer side wall of the base has an external thread. When fixing the compression cover and the base, after the base is installed and positioned, the compression cover is moved in the opposite direction and rotated until the compression cover and the base are threadedly fixed to fix the first sealing ring 5 between the bottom of the connecting groove and the end face of the notch of the base. The first sealing ring 5 is squeezed and deformed to achieve sealing between the pipe 1 and the base.

[0028] Optionally, in order to limit the first sealing ring 5, the notch of the base has an annular clearance notch, and the first sealing ring 5 is located at the clearance notch; the clearance notch faces the side close to the pipe 1, and the clearance notch and the outer wall of the pipe 1 cooperate to form a limiting groove, and the notch of the limiting groove faces the direction of the clamping cover. When fixed, the clamping cover is connected to the base, and the bottom of the connecting groove of the clamping cover squeezes the first sealing ring 5, so that the first sealing ring 5 is limited in the clearance notch.

[0029] In addition, the inclined surface of the notch not only facilitates the limiting of the first sealing ring 5, but also increases the contact area between the base and the first sealing ring 5, thereby improving the sealing effect. When the inclined surface squeezes the first sealing ring 5, it applies a force in an inclined direction to the first sealing ring 5, squeezing the first sealing ring 5 toward the direction of the pipe 1, thereby increasing the contact area between the first sealing ring 5 and the outer wall of the pipe 1, thereby improving the sealing effect of the first sealing ring 5 on the outer wall of the pipe 1.

[0030] See also Figure 3 In the second embodiment, in order to adapt to pipes 1 of different sizes, the installation and sealing of the pipe joint are convenient; the base includes a base body 3 and an inner sealing ring 6, one end of the inner sealing ring 6 is inserted into the receiving groove of the base body 3 and fits with the receiving groove, and the other end of the inner sealing ring 6 has a flange structure extending outward, and the flange structure is overlapped on the open end of the base, and a second sealing ring 7 is provided between the inner sealing ring 6 and the base; the inner side wall of the inner sealing ring 6 fits on the outer side wall of the quartz tube; the clamping cover also includes a cover body 2 and a sealing pressure plate 8, and the cover body 2 is connected to the base body 3; the sealing pressure plate 8 is located at the bottom of the connecting groove, and a through hole for accommodating the passage of the quartz tube is opened in the middle of the sealing pressure plate 8, and the sealing pressure plate 8 is adapted to the inner sealing ring 6; the cover body 2 is connected to the base body 3 for clamping the first sealing ring 5 and the second sealing ring 7.

[0031] When performing pressure tests on pipes 1 of different specifications, there is no need to frequently replace the base body 3 and the cover body 2, which can simplify the operation steps.

[0032] When the diameter of the pipe 1 is smaller than the inner diameter of the connection groove on the base body 3, an inner sealing ring 6 is added to the connection groove of the base body 3, one end of the inner sealing ring 6 is inserted into the connection groove, and an O-shaped sealing ring is added between the inner sealing ring 6 and the base body 3; and the first sealing ring 5 used to seal the pipe 1 is attached to the port of the inner sealing ring 6. The inner sealing ring 6 includes an annular body and a flange structure. The annular body is cylindrical, one end of the annular body extends into the notch of the receiving groove of the base, and the inner side wall of the annular body is attached to the outer side of the pipe 1; the other end of the annular body is connected to the flange structure, and the flange structure extends outward and overlaps the end face of the notch of the base. The second sealing ring 7 is located at the angle between the flange structure and the outer side of the annular body, and the second sealing ring 7 is pressed against the inclined surface of the notch of the receiving groove of the base body 3.

[0033] The through hole in the center of the sealing plate 8 matches the diameter of the pipe 1, and the sealing plate 8 fits the bottom of the connecting groove in the cover body 2. When sealing, the sealing plate 8 uses the connection state between the cover body 2 and the base to press the first sealing ring 5 and the second sealing ring 7 to achieve a sealed state.

[0034] Optional, such as Figure 3 and Figure 4 As shown, the number of inner sealing rings 6 can be selected as one or more according to the difference between the diameter of the pipe 1 and the inner diameter of the receiving groove of the base. Figure 4 As shown, in the third embodiment, when there are multiple inner sealing rings 6, the multiple inner sealing rings 6 are sequentially sleeved on the groove ends of the base, and a second sealing ring 7 is provided between two adjacent inner sealing rings 6; the number of sealing pressure plates 8 is one, and the sealing pressure plate 8 is adapted to the inner sealing ring 6 with the smallest inner diameter.

[0035] like Figure 4 As shown, the number of sealing rings can be multiple, and the sealing pressure plate 8 selects one according to the size of the innermost sealing ring. During installation, the cover body 2 and the base body 3 are connected, and the cover body 2 and the base body 3 are pressed against each other, so that the first sealing ring 5 and the plurality of second sealing rings 7 located therebetween are squeezed and sealed.

[0036] When there are multiple inner sealing rings 6, the annular body of each inner sealing ring 6 is sleeved in sequence; the flange structure of each inner sealing ring 6 is placed on the flange structure of the inner sealing ring 6 outside it. The second sealing ring 7 is limited within the angle between the annular body of each inner sealing ring 6 and the flange structure.

[0037] The connection between the inner side wall of the inner sealing ring 6 and the upper end surface of the flange structure has a chamfered surface. When there is only one inner sealing ring 6, the chamfered surface of the inner sealing ring is used to abut the first sealing ring 5, and the first sealing ring 5 is pressed against the outer side wall of the pipe 1 by means of the sealing pressing plate 8 to achieve the seal between the pipe 1 and the inner sealing ring 6. The second sealing ring 7 is pressed against the notch of the base body 3 to achieve the seal between the inner sealing ring 6 and the base body 3.

[0038] When there are multiple inner sealing rings 6, the inclined surface of the inner sealing ring 6 is used to abut the first sealing ring 5 or the second sealing ring 7 between two adjacent inner sealing rings 6. Both the first sealing ring 5 and the second sealing ring 7 are made of fluororubber O-rings, which have a better sealing effect and replace the original J-shaped sealing rings, thereby eliminating water leakage during the pressure test and shortening the test time. The sizes of the first sealing ring 5 and the second sealing ring 7 are selected according to actual test needs. Optionally, the size of the second sealing ring 7 between the base and the inner sealing ring 6 is larger than the size between two adjacent inner sealing rings 6.

[0039] In some possible embodiments, see Figures 1 to 4 One end of the radial hole 4 close to the outer wall of the base has a threaded section.

[0040] The radial holes 4 are distributed along the radial direction of the base body 3 and communicate with the receiving groove. One end of the radial hole 4 close to the outer wall of the base body 3 has a threaded section, which is used to connect the liquid inlet pipe or the liquid outlet pipe.

[0041] Opening and closing valves are provided at the ends of the liquid inlet pipe and the liquid outlet pipe.

[0042] A quartz tube pressure test assembly is also provided, including the quartz tube pressure test pipe joint as described above, wherein the two quartz tube pressure test pipe joints are respectively located at both ends of the quartz tube, wherein the radial hole 4 of one quartz tube pressure test pipe joint is connected to the liquid inlet pipe, and the radial hole 4 of the other quartz tube pressure test pipe joint is connected to the liquid outlet pipe.

[0043] Compared with the prior art, the quartz tube pressure test assembly provided by the present invention adopts the above-mentioned pipe joint and has all the beneficial effects thereof; the outer side of the quartz tube is circumferentially sealed by an O-ring, thereby solving the problem of loose sealing and easy water leakage, and improving the test accuracy; and the requirement for the horizontal degree of the end face of the tube 1 is reduced, thereby facilitating operation.

[0044] The joint at the liquid inlet end and the interface at the output end are both connected to manually open and close valves. During the pressure test, the valve at the liquid input end is opened, and the valve at the liquid discharge end is closed. The liquid enters the interior of the pipe 1 from the input end, and the liquid pressure continues to increase. After increasing to the value required by the specification, if there is no rupture in the pipe 1, it is considered that the pipe 1 has passed the pressure test. After the test, the valve at the input end is closed, and the valve at the discharge end is opened to discharge the liquid.

[0045] A quartz tube pressure test method is also provided, which uses the above-mentioned quartz tube pressure test pipe joint, and includes the following steps: S1, determine the outer diameter of the pipe 1 to be tested, determine the number of inner sealing rings 6 to be installed and the sealing plate 8 of the inner sealing ring 6 corresponding to the smallest inner diameter; S2. Install the liquid inlet pipe joint at one end of the pipe 1 to be tested: The compression cover is installed on the end of the quartz tube; When the number of inner sealing rings 6 is 0, the base is sleeved on the end of the quartz tube, and the pressing cover is moved in the opposite direction and connected to the base to limit the first sealing ring 5; When the number of inner sealing rings 6 is 1, the sealing plate 8, the first sealing ring 5, the inner sealing ring 6, the second sealing ring 7 and the base are sequentially sleeved on the end of the quartz tube, and the pressing cover is moved in the opposite direction and connected to the base to limit the first sealing ring 5 and the second sealing ring 7; When the number of inner sealing rings 6 is greater than 1, the sealing plate 8 and the first sealing ring 5 are sequentially sleeved on the end of the quartz tube, and then a plurality of inner sealing rings 6 and the base are sequentially installed on the rear side of the first sealing ring 5 in ascending order according to the inner diameter of the inner sealing ring 6, and a second sealing ring 7 is arranged between two adjacent inner sealing rings 6 and between the inner sealing ring 6 and the base, and the pressing cover is moved in the opposite direction and connected to the base to limit the first sealing ring 5 and the second sealing ring 7; S3. Repeat step S2 at the other end of the pipe 1 to be tested to install the liquid outlet pipe joint: S4, connecting the liquid inlet pipe to the liquid inlet pipe joint, and connecting the liquid outlet pipe to the liquid outlet pipe joint; S5, opening the liquid inlet pipe until the hydraulic pressure in the pipe 1 to be tested reaches the value required by the specification or the test ends when the pipe 1 to be tested ruptures; S6. Close the liquid inlet pipe and open the liquid outlet pipe.

[0046] Compared with the prior art, the quartz tube pressure resistance test method provided by the present invention adopts the above-mentioned pipe joint and has all the beneficial effects thereof; in addition, the test method can accurately verify the pressure resistance and pressure resistance limit of the quartz tube, and the pressure rise time is significantly shortened. At the same time, the operation steps and time of the pressure test are greatly reduced, and the experimental efficiency of the experiment is effectively improved by nearly 50% or more.

[0047] Specifically, the number and size of the inner sealing rings 6 are selected according to the outer diameter of the pipe 1 .

[0048] When the number of the inner sealing ring 6 is 0, the number of the sealing pressure plate 8 is also 0, and the pipe joint is composed of the cover body 2, the base body 3 and the first sealing ring 5. When installing the pipe joint, first put the first sealing ring 5 on the outer wall of the pipe 1 at 33mm from the end face, then put the cover body 2 of the pressing cover into the other end of the pipe 1, and then insert the pipe 1 at this end into the accommodating cavity of the base body 3, so that the first sealing ring 5 fits with the inclined surface of the notch of the base body 3, and finally locks the two parts through the threads of the pressing cover and the base, and first puts the cover body 2 of the pressing cover into the other end, and then puts the first sealing ring 5, and the rest is installed as the above steps; during the pressure test, the liquid enters from the radial hole 4 at the input end of the base body 3, and a small part of the liquid flows into the gap between the pipe 1 and the base body 3, and is blocked by the first sealing ring 5 after reaching the top of the base body 3; most of the other liquid flows into the inside of the pipe 1 and flows to the pipe joint at the other end. Alternatively, before the first sealing ring 5 is put on the pipe 1 , the cover body 2 of the compression cover is first put on the outside of the pipe 1 from the end of the pipe 1 .

[0049] When there is one inner sealing ring 6, the number of sealing pressure plates 8 is one, and the pipe joint is composed of a cover body 2, a sealing pressure plate 8, an inner sealing ring 6, a base body 3, a first sealing ring and a second sealing ring. When installing the pipe joint, first put the first sealing ring 5 on the outer wall of the pipe 1 at a distance of 35 mm from the end face, then insert the sealing pressure plate 8 and the cover body 2 of the compression cover from the other end of the pipe 1 in sequence, and at the same time put the second sealing ring 7 on the outer surface of the inner sealing ring 6 and move it to the flange structure, then first insert the inner sealing ring 6 with the second sealing ring 7 into the accommodating cavity of the base, and then pass this end of the pipe 1 through the interior of the inner sealing ring 6 until it is inserted into the accommodating cavity of the base, so that the second sealing ring 7 fits with the inclined surface of the notch of the base, and the first sealing ring 5 Fit with the chamfered surface of the inner sealing ring 6, and finally lock the two parts through the threads of the compression cover and the base. At the other end, insert the cover body 2 and the sealing plate 8 of the compression cover first, and then install the first sealing ring 5. The other steps are installed as above. During the pressure test, the liquid enters from the radial hole 4 at the input end of the base, and a small part of the liquid flows into the gap between the pipe 1 and the base body 3. After reaching the top of the base body 3, it is blocked by the first sealing ring 5 and the second sealing ring 7; most of the other liquid flows into the inside of the pipe 1 and flows to the other end of the pipe joint. Or before putting the first sealing ring 5 on the pipe 1, insert the cover body 2 of the compression cover from the end of the pipe 1 to the outside of the pipe 1.

[0050] When the number of sealing rings is greater than 1, the number of sealing pressure plates 8 is 1. The pipe joint is composed of a cover body 2, a sealing pressure plate 8, multiple inner sealing rings 6, a base body 3, a first sealing ring and multiple second sealing rings. First, put the first sealing ring 5 on the outer wall of the pipe 1 at a distance of 37 mm from the end face, and then insert the sealing pressure plate 8 and the cover body 2 of the compression cover from the other end of the pipe 1 in turn, and at the same time, put the second sealing ring 7 on the outer surface of the inner sealing ring 6 and move it to the flanging structure, and then first insert the inner sealing ring 6 with the second sealing ring 7 into the accommodating cavity of the base, and then pass this end of the pipe 1 through the interior of the inner sealing ring 6 until it is inserted into the accommodating cavity of the base, so that the second sealing ring 7 fits with the inclined surface of the base's notch, and repeat the installation operation of the inner sealing ring 6 until multiple inner sealing rings 6 are installed in sequence. At the notch of the base; the first sealing ring 5 fits with the chamfered surface of the inner sealing ring 6, and finally the two parts are locked by the threads of the compression cover and the base. At the other end, the cover body 2 and the sealing plate 8 of the compression cover are inserted first, and then the first sealing ring 5 is installed. The rest is installed as above. During the pressure test, the liquid enters from the radial hole 4 at the input end of the base, and a small part of the liquid flows into the gap between the pipe 1 and the base body 3. After reaching the top of the base body 3, it is blocked by the first sealing ring 5 and the second sealing ring 7; most of the other liquid flows into the inside of the pipe 1 and flows to the other end of the pipe joint. Or before putting the first sealing ring 5 on the pipe 1, the cover body 2 of the compression cover is inserted from the end of the pipe 1 to the outside of the pipe 1.

[0051] The test method proposed in the present invention seals the outer side of the pipe 1 to avoid applying axial force to the pipe 1, thereby reducing interference with the pressure test result; the first sealing ring 5 and the second sealing ring 7 have a better sealing effect and replace the original J-shaped sealing ring, thereby eliminating water leakage during the pressure test, shortening the test time, improving the accuracy of the test, and significantly shortening the pressure rise time. At the same time, the operating steps and time of the pressure test are greatly reduced, effectively improving the experimental efficiency of the experiment by nearly 50% or more; for pressure testing of pipes 1 of different specifications, it is only necessary to add an inner sealing ring 6 and replace the sealing pressure plate 8, without the need to frequently replace the cover body 2 and the base body 3 of the clamping cover, thereby simplifying the operating steps.

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. Quartz tube pressure test pipe joint, characterized in that: The invention comprises a pressing cover, a base and a sealing assembly, wherein the pressing cover and the base are sequentially sleeved on the end of a quartz tube, one end of the base is provided with a receiving groove extending in the axial direction, the notch of the receiving groove faces the pressing cover, a radial hole (4) is provided on the side wall of the base, and the radial hole (4) is communicated with the inner cavity of the receiving groove; the sealing assembly comprises a first sealing ring (5), the first sealing ring (5) is used to be sleeved on the outer side of the quartz tube, and the first sealing ring (5) is located between the base and the pressing cover, the pressing cover is sleeved on the outer side of the base from the notch direction of the base and the first sealing ring (5) is pressed between the port of the base and the quartz tube.

2. The quartz tube pressure test pipe joint according to claim 1, characterized in that: A connecting groove is formed at one end of the pressing cover close to the base, and an inner side wall of the connecting groove is connected to the base to press the first sealing ring (5).

3. The quartz tube pressure test pipe joint according to claim 2, characterized in that: The compression cover is threadably matched with the base.

4. The quartz tube pressure test pipe joint according to claim 2, characterized in that: The notch of the base is provided with an annular clearance notch, and the first sealing ring (5) is located at the clearance notch.

5. The quartz tube pressure test pipe joint according to claim 2, characterized in that: The base comprises a base body (3) and an inner sealing ring (6); one end of the inner sealing ring (6) is inserted into the receiving groove of the base body (3) and fits with the receiving groove; the other end of the inner sealing ring (6) has a flange structure extending outward, the flange structure overlaps the open end of the base; a second sealing ring (7) is provided between the inner sealing ring (6) and the base; the inner side wall of the inner sealing ring (6) fits with the outer side wall of the quartz tube; The compression cover further comprises a cover body (2) and a sealing pressure plate (8), wherein the cover body (2) is connected to the base body (3); the sealing pressure plate (8) is located at the bottom of the connecting groove, and a through hole for accommodating the passage of the quartz tube is opened in the middle of the sealing pressure plate (8), and the sealing pressure plate (8) is adapted to the inner sealing ring (6); The cover body (2) is connected to the base body (3) to compress the first sealing ring (5) and the second sealing ring (7).

6. The quartz tube pressure test pipe joint according to claim 5, characterized in that: There are a plurality of inner sealing rings (6), and the plurality of inner sealing rings (6) are sequentially sleeved on the notch end of the base, and a second sealing ring (7) is provided between two adjacent inner sealing rings (6); there is one sealing pressure plate (8), and the sealing pressure plate (8) is adapted to the inner sealing ring (6) with the smallest inner diameter.

7. The quartz tube pressure test pipe joint according to claim 5, characterized in that: A chamfered surface is provided at the connection between the inner side wall of the inner sealing ring (6) and the upper end surface of the flange structure.

8. The quartz tube pressure test pipe joint according to claim 1, characterized in that: One end of the radial hole (4) close to the outer side wall of the base has a threaded section.

9. Quartz tube pressure test assembly, characterized in that: It comprises two quartz tube pressure test pipe joints as described in any one of claims 5 to 8, wherein the two quartz tube pressure test pipe joints are respectively located at both ends of a quartz tube, wherein the radial hole (4) of one of the quartz tube pressure test pipe joints is connected to a liquid inlet pipe, and the radial hole (4) of the other quartz tube pressure test pipe joint is connected to a liquid outlet pipe.

10. A method for testing the pressure resistance of a quartz tube, characterized in that: The quartz tube pressure test pipe joint according to any one of claims 5 to 8 is used, comprising the following steps: S1, determining the outer diameter of the pipe (1) to be tested, determining the number of inner sealing rings (6) to be installed and the sealing pressure plate (8) corresponding to the inner sealing ring (6) with the smallest inner diameter; S2. Install the liquid inlet pipe joint at one end of the pipe to be tested (1): The compression cover is placed on the end of the quartz tube; When the number of the inner sealing rings (6) is 0, the base is sleeved on the end of the quartz tube, and the pressing cover is moved in the opposite direction and connected to the base to limit the first sealing ring (5); When the number of the inner sealing ring (6) is 1, the sealing pressure plate (8), the first sealing ring (5), the inner sealing ring (6), the second sealing ring (7) and the base are sequentially sleeved on the end of the quartz tube, and the pressing cover is moved in the opposite direction and connected to the base to limit the first sealing ring (5) and the second sealing ring (7); When the number of inner sealing rings (6) is greater than 1, the sealing pressure plate (8) and the first sealing ring (5) are sequentially sleeved on the end of the quartz tube, and then a plurality of inner sealing rings (6) and a base are sequentially installed on the rear side of the first sealing ring (5) in order from small to large according to the inner diameter of the inner sealing ring (6), and a second sealing ring (7) is arranged between two adjacent inner sealing rings (6) and between the inner sealing ring (6) and the base, and the pressing cover is moved in the opposite direction and connected to the base to limit the first sealing ring (5) and the second sealing ring (7); S3. Repeat step S2 at the other end of the pipe to be tested (1) to install the liquid outlet pipe joint: S4, connecting the liquid inlet pipe to the liquid inlet pipe joint, and connecting the liquid outlet pipe to the liquid outlet pipe joint; S5, opening the liquid inlet pipe until the hydraulic pressure in the pipe to be tested (1) reaches the value required by the specification or the test ends when the pipe to be tested (1) ruptures; S6. Close the liquid inlet pipe and open the liquid outlet pipe.

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