Rubber cartridge swelling experimental device and its use method

Abstract

The present invention relates to the field of downhole gas injection technology in oilfield development of the petroleum industry, and specifically to a rubber cylinder swelling test device and a method of using the same. The device includes a gas cylinder, an air compressor, a gas booster pump, a thermostat, a high-temperature and high-pressure test cylinder and a valve; the gas cylinder and the air compressor are respectively connected to the gas booster pump, the gas booster pump is connected to the high-temperature and high-pressure test cylinder, the high-temperature and high-pressure test cylinder is placed inside the thermostat, and valves are provided at the inlet and outlet of the high-temperature and high-pressure test cylinder. The present invention uses a gas booster pump to pressurize the high-pressure test cylinder to simulate the downhole high-pressure environment; the high-pressure test cylinder is installed in a thermostat to simulate the downhole high-temperature environment. The rubber cylinder is installed in the high-pressure test cylinder, and the radial deformation of the rubber cylinder is converted into an angle change through a rack and gear meshing mechanism. The radial expansion rate of the rubber cylinder is calculated by reading the angle change value, thereby realizing the measurement of the swelling rate of the rubber cylinder under a high-temperature and high-pressure environment.

Description

Technical Field

[0001] The invention relates to the technical field of downhole gas injection in oilfield development of the petroleum industry, and in particular to a rubber cartridge swelling experimental device and a use method thereof. Background Art

[0002] CO2 flooding is an effective method to reduce carbon emissions and improve oil recovery, and has received widespread attention and application at home and abroad. In CO2 flooding gas injection wells, packers are used to isolate the downhole tubing and casing annulus to ensure the safety of gas injection production. As a key component for the packer to achieve the sealing function, the performance of the rubber cartridge is related to the success or failure of the packer to isolate the casing annulus. Gas injection wells usually contain gases such as CO2. During the operation, as the well depth increases, the ambient temperature and pressure gradually increase, and the rubber cartridge is immersed in high-temperature, high-pressure, gas-containing well fluid, gradually swelling, and performance reduction, which seriously affects the sealing effect of the packer and even causes the operation to fail.

[0003] The rubber cartridge is a rubber seal, which is a polymer material with high elasticity and excellent elasticity. Swelling is a phenomenon unique to polymer materials. The reason is that the size of solvent molecules and polymer molecules is very different, and the molecular movement speed is very different. The diffusion speed of solvent molecules is fast, while the diffusion of polymers into the solvent is slow. Factors affecting the expansion of the rubber cartridge include liquid medium, gas, temperature and pressure. The temperature of the gas injection well can reach above 100°C and the pressure can reach above 20MPa. During the operation, under high temperature and high pressure environment, gas molecules can easily diffuse into the inside of the rubber cartridge, causing the volume of the rubber cartridge to expand, resulting in a decrease in the performance of the rubber cartridge. In order to achieve a good seal of the packer and ensure the safe production of gas injection wells, it is necessary to develop a rubber cartridge with excellent anti-swelling performance. To study the anti-swelling performance of the rubber cartridge, it is necessary to apply the swelling test method and equipment of the rubber cartridge under high temperature and high pressure. However, there is currently no relevant experimental equipment in China.

[0004] Chinese patent application CN108020481A discloses a method for testing the swelling degree of rubber. This method mainly involves immersing a certain mass of a sample to be tested in a solvent, measuring the mass of the sample at fixed intervals, and calculating the mass change rate before and after swelling to obtain the swelling degree.

[0005] Chinese invention patent CN103336109B discloses a rubber swelling test device. The device includes a gear pump, a motor, a coupling, a throttle valve, a pipeline, a pipe joint, a temperature control box, a heating plate, an immersion tank, an immersion tank bracket, a rubber fixture, etc. The rubber sample is mounted on the rubber fixture, placed in the immersion tank, and the immersion liquid is added to make the rubber swell. It is suitable for simulating the swelling aging test of rubber under a long working cycle.

[0006] Chinese invention patent CN103344751B discloses a gas-liquid mixed rubber swelling aging test device, which mainly includes three parts: a temperature control box assembly, a liquid medium immersion circulation device, and a gas flow control and recovery device. The rubber sample is clamped on a rubber fixture, placed in a swelling tank filled with a liquid medium, and a certain flow of gas is introduced to realize the swelling aging test of the rubber. The invention can simulate the dynamic (different gas flow rate, liquid medium flow rate) and static immersion swelling aging tests of rubber under different temperatures, different liquid media, and different gases, and is particularly suitable for simulating the resistance of rubber to gas immersion and oil immersion swelling aging under long working cycles.

[0007] Chinese invention patent CN106226508B discloses a stretching device and a test method for testing the swelling characteristics of rubber. The stretching device includes a frame, a moving plate arranged in the frame, and a rotating device for driving the moving plate to move back and forth. The frame and the moving plate are provided with clamping devices for clamping the two ends of the rubber respectively. The position of the moving plate is adjusted by the rotating device, thereby adjusting the spacing between the clamping devices, so that the mass change and volume change of the rubber specimen under different deformation amounts can be tested.

[0008] The rubber swelling test devices and methods involved in the existing patents are all carried out under normal pressure conditions, which do not meet the measurement requirements of the rubber cylinder swelling rate under high pressure. Summary of the invention

[0009] The main purpose of the present invention is to provide a rubber cylinder swelling experimental device and a method of using the same. The rubber cylinder swelling experimental device of the present invention can realize accurate measurement of the rubber cylinder swelling rate under high temperature and high pressure conditions, thus solving the problem of difficulty in measuring the rubber cylinder swelling rate under high pressure conditions.

[0010] To achieve the above object, the present invention adopts the following technical solutions:

[0011] A rubber cylinder swelling test device, the device comprising a gas cylinder, an air compressor, a gas booster pump, a thermostat, a high temperature and high pressure test cylinder and a valve; the gas cylinder and the air compressor are respectively connected to the gas booster pump, the gas booster pump is connected to the high temperature and high pressure test cylinder, the high temperature and high pressure test cylinder is placed inside the thermostat, and valves are provided at the inlet and outlet of the high temperature and high pressure test cylinder;

[0012] Preferably, the high-temperature and high-pressure test cylinder includes a high-pressure container, a rubber cylinder device, a height adjustment device, a swelling and deformation conversion device, a thrust bearing device and a display device; the rubber cylinder device is installed inside the high-pressure container, the height adjustment device is installed on the upper end of the rubber cylinder device, the swelling and deformation conversion device is installed on the upper end of the rubber cylinder device, the thrust bearing device is installed outside the high-pressure container, and the display device is connected to the thrust bearing device.

[0013] Preferably, the high pressure container is composed of a sealed cavity surrounded by an upper head, an outer tube, a lower head, a sealing head and a sealing rod. Preferably, the high pressure container is provided with an inlet and an outlet, through which the interior of the high pressure container is inflated and emptied.

[0014] Preferably, the rubber cylinder device is composed of an upper baffle, a rubber cylinder, a lower baffle and a rubber cylinder tube; and the height adjustment device is composed of an adjustment seat and a base.

[0015] Further preferably, the adjustment seat is connected to the rubber tube by threads, and the height in the vertical direction can be adjusted by rotating the adjustment seat after installation.

[0016] Preferably, the swelling deformation conversion device is composed of a conversion gear, a gear shaft, a rack, a base, a push rod, a push plate and a sealing rod; the rack is installed in a guide rail provided on the base and having a clearance matching the rack cross section, and the conversion gear and the rack are meshed with each other; the push rod is connected to the rack at an angle of 90°, and the push plate is connected to the push rod; the push plate is close to the rubber cylinder device. When the rubber cylinder expands radially, it pushes the push plate, driving the push rod and the rack to move outward, thereby driving the conversion gear to rotate, so that the deformation of the rubber cylinder in the radial direction is converted into rotational motion.

[0017] Further preferably, the cross section of the push plate is arc-shaped or square-shaped;

[0018] Further preferably, the push plate may be a perforated plate or a grooved plate;

[0019] Further preferably, a wire mesh may be bonded onto the push plate; further preferably, the wire mesh may be made of steel or plastic.

[0020] Preferably, the swelling deformation conversion device includes a bearing bracket, a base, a horizontal axis, a vertical axis, a bearing, a conversion gear, a rack, and a push rod; the bearing bracket is fixed on the base, at least two horizontal axes are installed horizontally and parallelly on the bearing bracket, and a bearing is installed on each horizontal axis; the rack is placed on each bearing, the left and right sides of the rack are close to the horizontally arranged bearings, the horizontally arranged bearings are installed on the vertical axis, and the vertical axis is installed on the base; the conversion gear and the rack are meshed with each other; the push rod is connected to the rack at an angle of 90°, and the push plate is connected to the push rod; the push plate is close to the rubber cylinder device. When the rubber cylinder expands radially, it pushes the push plate, drives the push rod and the rack to move outward, thereby driving the conversion gear to rotate, so that the radial deformation of the rubber cylinder is converted into rotational motion. Since the guide rail is composed of bearings, the movement resistance of the rack is smaller, so it is easier to move.

[0021] Preferably, the thrust bearing device comprises a limiting sleeve, a sealing rod and a thrust bearing; the thrust bearing sleeve is mounted on the sealing rod, and the sealing rod is connected to the swelling deformation conversion device; the outer side of the thrust bearing is pressed against the limiting sleeve;

[0022] The display device comprises a sealing rod, a pointer and an angle disc; the surface of the angle disc is engraved with angle scale lines, and the angle disc is fixed on the limiting sleeve; the pointer is fixed on the sealing rod, and the tip of the pointer points to the scale line on the angle disc.

[0023] Preferably, the display device includes a sealing rod, a limit sleeve, a pointer, a pointer shaft, an angle disk, a bracket, a bearing sleeve, a bearing, a large gear and a small gear; the bearing is mounted on the pointer shaft, the bearing sleeve is fixed on the outer ring of the bearing, the bracket and the angle disk are fixed on the bearing sleeve in turn, and the upper end of the bracket is fixed on the limit sleeve; the small gear and the pointer are mounted on the other end of the pointer shaft in turn, and the tip of the pointer points to the scale line on the angle disk; the large gear is mounted on the sealing rod, and the large gear and the small gear are meshed with each other. The rotation of the large gear drives the small gear and the pointer to rotate, thereby amplifying the rotation angle change value of the pointer.

[0024] The present invention also provides a method for calculating the radial expansion rate of a rubber cylinder using the rubber cylinder swelling experimental device described above, the method comprising:

[0025] (1) Install the test rubber cylinder in the high-pressure container, rotate the adjustment seat, adjust the height, and complete the assembly of the high-temperature and high-pressure test cylinder; then place the high-temperature and high-pressure test cylinder in a constant temperature box and connect all experimental equipment; record the initial radius R of the rubber cylinder and the scale value α0 pointed by the pointer;

[0026] (2) Heat the thermostat to the test temperature and keep the temperature constant for a period of time to raise the temperature of the rubber cylinder to the test temperature; then use a booster pump to fill the test gas into the high temperature and high pressure test cylinder and increase the pressure to the test pressure;

[0027] (3) At regular intervals, observe the rotation of the pointer and record the scale values ​​α1, α2, …α n , until the pointer stops rotating;

[0028] (4) Calculate the ratio of the gear rotation angle change to the rack linear displacement change based on the parameters of the rack and gear, denoted as k; calculate the rubber cylinder radial expansion rate θ using the following formula:

[0029]

[0030] Compared with the prior art, the present invention has the following advantages:

[0031] The present invention uses a gas booster pump to increase the pressure of the high-pressure test cylinder to simulate the underground high-pressure environment; the high-pressure test cylinder is installed in a constant temperature box to simulate the underground high-temperature environment. The rubber cylinder is installed in the high-pressure test cylinder, and the radial deformation of the rubber cylinder is converted into an angle change through a rack and gear meshing device. The radial expansion rate of the rubber cylinder is calculated by reading the angle change value, thereby realizing the measurement of the swelling rate of the rubber cylinder under high temperature and high pressure environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0033] Figure 1 It is a schematic diagram of the structure of the rubber cartridge swelling experimental device described in Example 1 of the present invention;

[0034] Figure 2 The front view and the left view of the high temperature and high pressure test tube of Example 1 of the present invention are shown; the left view is the front view, and the right view is the left view;

[0035] Figure 3 It is a schematic diagram of the front view and left view of the swelling deformation conversion device in the high temperature and high pressure test cylinder according to Example 2 of the present invention; the left view is the front view, and the right view is the left view;

[0036] Figure 4 It is a partial top view of the swelling-deformation conversion device in the high-temperature and high-pressure test cylinder according to Example 2 of the present invention;

[0037] Figure 5 It is a schematic structural diagram of the display device in the high temperature and high pressure test cylinder according to Example 1 of the present invention;

[0038] Figure 6 It is a schematic diagram of the structure of the display device in the high temperature and high pressure test cylinder according to Example 3 of the present invention;

[0039] Figure 7 This is a schematic diagram of the push plate structure described in Example 1 of the present invention;

[0040] Figure 8 is a schematic structural diagram of the push plate described in Example 4 of the present invention;

[0041] Fig. 9 It is a schematic diagram of the structure of the push plate described in Example 5 of the present invention.

[0042] Among them, 1. gas cylinder, 2. air compressor, 3. gas booster pump, 4. constant temperature box, 5. high temperature and high pressure test tube, 6. valve, 201. upper head, 202. outer tube, 203. baffle, 204. hose tube, 205. rubber tube, 206. lower baffle, 207. lower head, 208. conversion gear, 209. gear shaft, 210. rack, 211. base, 212. adjustment seat, 213. push rod, 214. push plate, 215 .Sealing head, 216. Limit sleeve, 217. Thrust bearing, 218. Sealing rod, 219. Pointer, 220. Angle plate, 221. Guide rail, 301. Bearing, 302. Vertical shaft, 303. Horizontal shaft, 304. Bearing bracket, 501. Angle scale, 601. Bracket, 602. Bearing sleeve, 603. Pointer shaft, 605. Large gear, 606. Small gear, 701. Push plate hole, 801. Push plate groove, 901. Wire mesh. DETAILED DESCRIPTION

[0043] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0044] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations and / or combinations thereof.

[0045] In order to enable those skilled in the art to more clearly understand the technical solution of the present invention, the technical solution of the present invention will be described in detail below in conjunction with specific embodiments.

[0046] Example 1 A rubber cartridge swelling test device

[0047] like Figure 1 As shown, the rubber cylinder swelling test device consists of a gas cylinder 1, an air compressor 2, a gas booster pump 3, a thermostat 4, a high temperature and high pressure test cylinder 5, and a valve 6. The gas cylinder 1 and the air compressor 2 are respectively connected to the gas booster pump 3, and the gas booster pump 3 is connected to the high temperature and high pressure test cylinder 5. The high temperature and high pressure test cylinder 5 is placed inside the thermostat 4, and the inlet and outlet of the high temperature and high pressure test cylinder 5 are both provided with valves 6. The thermostat is used to heat and keep the high temperature and high pressure test cylinder warm. The air compressor provides driving force for the gas booster pump to fill the experimental gas in the gas cylinder into the high temperature and high pressure test cylinder.

[0048] like Figure 2As shown, the high temperature and high pressure test cylinder 5 includes a high pressure container, a rubber cylinder device, a height adjustment device, a swelling deformation conversion device, a thrust bearing device and a display device. The rubber cylinder device is installed inside the high pressure container. The height adjustment device is installed on the upper end of the rubber cylinder device. The swelling deformation conversion device is installed on the upper end of the rubber cylinder device. The thrust bearing device is installed outside the high pressure container. The display device is connected to the thrust bearing device.

[0049] The high pressure container is composed of a sealed cavity surrounded by an upper head 201, an outer tube 202, a lower head 207, a sealing head 215 and a sealing rod 218. The high pressure container is provided with an inlet and an outlet, through which the interior of the high pressure container is inflated and vented.

[0050] The rubber cartridge device is composed of an upper baffle 203 , a rubber cartridge 205 , a lower baffle 206 and a rubber cartridge tube 204 ; the rubber cartridge tube is connected to a lower sealing head 207 .

[0051] The height adjustment device is composed of an adjustment seat 212 and a base 211. The adjustment seat is threadedly connected to the rubber tube 204, and the height in the vertical direction can be adjusted by rotating the adjustment seat after installation.

[0052] The swelling deformation conversion device is composed of a conversion gear 208, a gear shaft 209, a rack 210, a base 211, a push rod 213, a push plate 214 and a sealing rod 218. The rack is installed in a guide rail 221 provided on the base and matched with the clearance of the rack cross section. The rack can move in the guide rail. Lubricating oil can be added in the guide rail to reduce the resistance of the rack movement. The conversion gear and the rack are meshed with each other. The push rod is connected to the rack at an angle of 90°, and the connection method can be welding or bolt connection. The push plate is welded to the push rod. The push plate is close to the outer cylindrical surface of the rubber cylinder 205. The cross section of the push plate is arc-shaped or square. When the rubber cylinder 205 expands radially, it pushes the push plate, drives the push rod and the rack to move outward, thereby driving the conversion gear 208 to rotate, so that the deformation of the rubber cylinder in the radial direction is converted into rotational motion.

[0053] The thrust bearing device is composed of a limit sleeve 216, a sealing rod 218 and a thrust bearing 217. The thrust bearing is sleeved on the sealing rod, and the sealing rod is connected to the gear shaft 209. The outer side of the thrust bearing is pressed against the limit sleeve. When the high-pressure container is filled with high-pressure gas, the pressure difference between the inside and outside of the high-pressure container pushes the sealing rod to move outward, and the thrust bearing is pressed against the limit sleeve, so that it cannot move outward, and the sealing rod can realize rotational motion.

[0054] like Figure 5As shown, the display device is composed of a sealing rod 218, a pointer 219 and an angle disc 220. An angle scale 501 is engraved on the surface of the angle disc, and the angle disc is fixed on the limit sleeve 216. The pointer is fixed on the sealing rod, and the tip of the pointer points to the scale line on the angle disc. The rubber cylinder 205 is deformed, driving the push plate 214, the push rod 213 and the rack 210 to move, thereby rotating the conversion gear 208, driving the gear shaft 209, the sealing rod 218 and the pointer 219 to rotate, so that the scale value on the angle disc pointed by the pointer changes.

[0055] like Figure 7 As shown, the push plate 214 is a perforated plate, and there are many holes 701 on the push plate, and the shape of the holes can be circular or square.

[0056] Example 2 A rubber cartridge swelling experimental device

[0057] The difference between the rubber cartridge swelling experimental device and the embodiment 1 is that the swelling deformation conversion device comprises a bearing bracket 304, a base 211, a horizontal shaft 303, a bearing 301, a rack 210, a vertical shaft 302, a conversion gear 208, a push rod 213, and a push plate 214. Figure 3 , Figure 4 As shown. The bearing bracket 304 is fixed on the base 211, and at least two horizontal shafts 303 are installed horizontally and parallelly on the bearing bracket, and a bearing is installed on each horizontal shaft. The rack 210 is placed on these bearings, and the left and right sides of the rack are close to the horizontally arranged bearings. The horizontally arranged bearings are installed on the vertical shaft 302, and the vertical shaft is installed on the base 211. The conversion gear 208 and the rack 210 are meshed with each other. The push rod 213 is connected to the rack at an angle of 90°, and the connection method can be welding or bolt connection. The push plate 214 is welded to the push rod. The push plate is close to the outer cylindrical surface of the rubber cylinder 205. The cross section of the push plate is arc-shaped or square. When the rubber cylinder 205 expands radially, it pushes the push plate, drives the push rod and the rack to move outward, thereby driving the conversion gear 208 to rotate, so that the radial deformation of the rubber cylinder is converted into rotational motion. Since the guide rails are composed of bearings, the movement resistance of the rack is smaller, so the movement is easier.

[0058] Example 3: A device for testing the swelling of a rubber cartridge

[0059] The difference between the rubber cylinder swelling experimental device and the embodiment 1 is that the display device includes a limit sleeve 216, a sealing rod 218, a pointer 219, an angle plate 220, a bracket 601, a bearing sleeve 602, a pointer shaft 603, a bearing 301, a large gear 605 and a small gear 606. Figure 6As shown, the bearing 301 is mounted on the pointer shaft 603, the bearing sleeve 602 is fixed on the outer ring of the bearing, the bracket 601 and the angle disc 220 are fixed on the bearing sleeve 602 in sequence, and the upper end of the bracket 601 is fixed on the limit sleeve 216. The small gear 606 and the pointer 219 are sequentially mounted on the other end of the pointer shaft 603, and the tip of the pointer 219 points to the scale line on the angle disc 220. The large gear 605 is mounted on the sealing rod 218, and the large gear 605 and the small gear 606 are meshed with each other. The rotation of the large gear 605 drives the small gear 606 and the pointer 219 to rotate, thereby amplifying the rotation angle change value of the pointer 219, so that when the rubber cylinder 205 is slightly deformed, the pointer 219 can produce a larger rotation angle.

[0060] Example 4: A device for testing the swelling of a rubber cartridge

[0061] The difference between the rubber cylinder swelling experimental device and the embodiment 1 is that the push plate 214 is a grooved plate, and many crisscross grooves 801 are engraved on the push plate, such as Figure 8 shown.

[0062] Example 5: A device for testing the swelling of a rubber cartridge

[0063] The difference between the rubber tube swelling experimental device and the embodiment 1 is that the push plate 214 is bonded with the screen 901 on the side of the push plate close to the rubber tube 205. Fig. 9 The material of the wire mesh can be steel or plastic.

[0064] Example 6

[0065] The method for calculating the radial expansion rate of the rubber cylinder using the above rubber cylinder swelling experimental device comprises:

[0066] (1) Install the test rubber cylinder in the high-pressure container, rotate the adjustment seat, adjust the height, make the center lines of the gear shaft and the sealing rod coincide, and complete the assembly of the high-temperature and high-pressure test cylinder; then place the high-temperature and high-pressure test cylinder in a constant temperature box and connect all experimental equipment. Record the initial radius R of the rubber cylinder and the scale value α0 pointed by the pointer.

[0067] (2) Heat the thermostat to the test temperature and keep it constant for a while to raise the temperature of the rubber cylinder to the test temperature. Then use a booster pump to fill the test gas into the high temperature and high pressure test cylinder and increase the pressure to the test pressure.

[0068] (3) At regular intervals, observe the rotation of the pointer and record the scale value α1, α2…αn to which the pointer points until the pointer stops rotating.

[0069] (4) Calculate the ratio of the gear rotation angle change to the rack linear displacement change based on the parameters of the rack and gear, denoted as k. Calculate the rubber cylinder radial expansion rate θ using the following formula:

[0070]

[0071] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. The device for the test of the swelling of the rubber cylinder is characterized by: The device comprises a gas cylinder, an air compressor, a gas booster pump, a thermostat, a high-temperature and high-pressure test cylinder and a valve; the gas cylinder and the air compressor are respectively connected to the gas booster pump, the gas booster pump is connected to the high-temperature and high-pressure test cylinder, the high-temperature and high-pressure test cylinder is placed inside the thermostat, and valves are provided at the inlet and outlet of the high-temperature and high-pressure test cylinder; The high-temperature and high-pressure test cylinder comprises a high-pressure container, a rubber cylinder device, a height adjustment device, a swelling and deformation conversion device, a thrust bearing device and a display device; the rubber cylinder device is installed inside the high-pressure container, the height adjustment device is installed on the upper end of the rubber cylinder device, the swelling and deformation conversion device is installed on the upper end of the rubber cylinder device, the thrust bearing device is installed outside the high-pressure container, and the display device is connected to the thrust bearing device; The high-pressure container is composed of a sealed cavity surrounded by an upper head, an outer tube, a lower head, a sealing head and a sealing rod; the high-pressure container is provided with an inlet and an outlet; The rubber cylinder device is composed of an upper baffle, a rubber cylinder, a lower baffle and a rubber cylinder tube; the height adjustment device is composed of an adjustment seat and a base; The adjusting seat is connected to the rubber tube by threads, and the height in the vertical direction can be adjusted by rotating the adjusting seat after installation; The swelling deformation conversion device is composed of a conversion gear, a gear shaft, a rack, a base, a push rod, a push plate and a sealing rod; the rack is installed in a guide rail provided on the base and having a clearance matching the rack cross section, and the conversion gear and the rack are meshed with each other; the push rod is connected to the rack at an angle of 90°, and the push plate is connected to the push rod; the push plate is close to the rubber cylinder device; The swelling deformation conversion device comprises a bearing bracket, a base, a horizontal axis, a vertical axis, a bearing, a conversion gear, a rack, and a push rod; the bearing bracket is fixed on the base, at least two horizontal axes are horizontally and parallelly installed on the bearing bracket, and a bearing is installed on each horizontal axis; the rack is placed on each bearing, the left and right sides of the rack are close to the horizontally arranged bearing, the horizontally arranged bearing is installed on the vertical axis, and the vertical axis is installed on the base; the conversion gear and the rack are meshed with each other; the push rod is connected to the rack at an angle of 90°, and the push plate is connected to the push rod; the push plate is close to the rubber cylinder device; The thrust bearing device comprises a limiting sleeve, a sealing rod and a thrust bearing; the thrust bearing sleeve is mounted on the sealing rod, and the sealing rod is connected to the swelling deformation conversion device; the outer side of the thrust bearing is pressed into the limiting sleeve; The display device includes a sealing rod, a pointer and an angle plate; the surface of the angle plate is engraved with angle lines, and the angle plate is fixed on the limit sleeve; The pointer is fixed on the sealing rod, and the tip of the pointer points to the scale line on the angle disk; The display device includes a sealing rod, a limit sleeve, a pointer, a pointer shaft, an angle disk, a bracket, a bearing sleeve, a bearing, a large gear and a small gear; the bearing is installed on the pointer shaft, the bearing sleeve is fixed on the outer ring of the bearing, the bracket and the angle disk are fixed on the bearing sleeve in turn, and the upper end of the bracket is fixed on the limit sleeve; the small gear and the pointer are sequentially mounted on the other end of the pointer shaft, and the tip of the pointer points to the scale line on the angle disk; the large gear is mounted on the sealing rod, and the large gear and the small gear are meshed with each other.

2. The rubber cartridge swelling test device according to claim 1, characterized in that: The cross section of the push plate is arc-shaped or square-shaped; the push plate is a perforated plate or a grooved plate; the wire mesh is bonded on the push plate; the material of the wire mesh is steel or plastic.

3. A method for calculating the radial expansion rate of a rubber cartridge using the rubber cartridge swelling test device according to any one of claims 1 to 2, characterized in that: The method comprises: (1) Install the test rubber cylinder in the high-pressure container, rotate the adjustment seat, adjust the height, and complete the assembly of the high-temperature and high-pressure test cylinder; then place the high-temperature and high-pressure test cylinder in a constant temperature box and connect all experimental equipment; record the initial radius R of the rubber cylinder and the scale value α0 pointed by the pointer; (2) Heat the thermostat to the test temperature and keep the temperature constant for a period of time to raise the temperature of the rubber cylinder to the test temperature; then use a booster pump to fill the test gas into the high temperature and high pressure test cylinder and increase the pressure to the test pressure; (3) At regular intervals, observe the rotation of the pointer and record the scale values ​​α1, α2, …α n , until the pointer stops rotating; (4) Calculate the ratio of the gear rotation angle change to the rack linear displacement change based on the parameters of the rack and gear, denoted as k; calculate the rubber cylinder radial expansion rate θ using the following formula:

Images