Testing device and testing method for horizontal valve

Abstract

The invention provides a testing device and a testing method for a horizontal valve, and belongs to the technical field of valve testing. Comprising an oiling assembly and a valve pressure testing machine, a pressing seat is slidably arranged on the left side of the valve pressure testing machine, and an oiling cylinder is fixedly installed on the right side of the valve pressure testing machine. By arranging the oil injection assembly and the positioning column, the motor is driven during oil injection to drive the to-be-tested valve and the oil injection pipe to rotate, hydraulic oil is introduced into the to-be-tested valve in a rotating mode, the hydraulic oil moves on the inner wall of the to-be-tested valve under the action of centrifugal force, and whether oil leakage happens to the surface wall of the to-be-tested valve or not is observed. Therefore, whether a gap exists in the to-be-tested valve or not is judged, whether the valve reaches the pressure standard or not can be judged by observing the index of the pressure gauge after a period of time, meanwhile, the concentricity of the to-be-tested valve can be detected when the to-be-tested valve rotates, and the problems that an existing horizontal valve testing device is low in detection efficiency and poor in detection effect are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of valve testing, and particularly relates to a testing device and a testing method for a horizontal valve. Background Art

[0002] The valve testing press integrates mechanical and electrical, hydraulic, pressure testing, and liquid medium storage and recycling, and has the characteristics of perfect functions, stable performance, and high automation.

[0003] When the existing valve testing press conducts a pressure test on a horizontal valve, it tests by statically inputting hydraulic oil and simultaneously observing the internal pressure of the valve. However, when there is a crack at the top of the valve, it is necessary to fill the valve to be tested with hydraulic oil to detect the location of the crack. If the valve is large in volume, the static input method requires a long injection time, thus reducing the detection efficiency. At the same time, some horizontal valves need to detect their concentricity, and the existing testing devices cannot meet the usage requirements. If the method of rotating the valve to be tested is used for pressure testing, the injection pipe will move due to gravity or concentricity problems during the oil injection process, resulting in oil leakage in the testing device, thus affecting the test results.

[0004] Therefore, the present application provides a testing device and a testing method for a horizontal valve to meet the requirements. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a testing device and a testing method for a horizontal valve. By setting an oil injection assembly and a positioning column, while injecting oil, a driving motor is driven to drive the valve to be tested and the injection pipe to rotate, so as to realize the rotation of hydraulic oil into the valve to be tested. Under the action of centrifugal force, the hydraulic oil moves on the inner wall of the valve to be tested. By observing whether there is oil leakage on the surface of the valve to be tested, it can be judged whether there is a gap inside the valve to be tested. After a period of time, by observing the index of the pressure gauge, it can be judged whether the valve reaches the pressure standard. At the same time, the concentricity of the valve to be tested can be detected when it rotates, so as to solve the problems of low detection efficiency and poor detection effect of the existing horizontal valve testing device.

[0006] To solve the above technical problems, the present invention provides the following technical solutions: A testing device and a testing method for a horizontal valve, including an oil injection assembly and a valve testing press. A pressure seat is slidably arranged on the left side of the valve testing press, and an oil injection cylinder is fixedly installed on the right side of the valve testing press. The oil injection assembly includes a main sealing sleeve. Three groups of L-shaped grooves are evenly arranged on the outer wall of the middle part of the main sealing sleeve, and the bottom of the L-shaped groove is communicated with the inside of the main sealing sleeve. An injection pipe is arranged inside the main sealing sleeve. One end of the injection pipe is communicated with the pressure seat, and the other end is communicated with the oil injection cylinder. A magnetic compensation mechanism is arranged in each of the three groups of L-shaped grooves.

[0007] Optionally, a plurality of spacer rings are uniformly and fixedly installed on the outer wall of the middle part of the oil injection pipe located inside the main sealing sleeve. A barrier section is formed between two adjacent spacer rings and the inside of the main sealing sleeve. A permanent magnet ring is fixedly installed on the inner wall of the main sealing sleeve. The magnetic replenishment mechanism includes a main cylinder body, which is fixedly connected to the inner wall of the L-shaped groove, and the bottom of the main cylinder body communicates with the inside of the barrier section. A baffle is fixedly installed on the inner wall of the top of the main cylinder body. A double-headed plunger is slidably connected to the inner wall of the baffle, and both ends of the double-headed plunger are hermetically and slidably connected to the inner wall of the main cylinder body. An air injection hole is opened at the top of the main cylinder body. A secondary cylinder body is fixedly installed on the inner wall of the L-shaped groove. The secondary cylinder body communicates with the main cylinder body, and a one-way valve is fixedly installed at the communication part. A piston is hermetically and slidably connected to the inner wall of the secondary cylinder body. An elastic pressing head is slidably connected to the inner wall of the top of the secondary cylinder body, and the bottom of the elastic pressing head is connected to the piston. The inside of the secondary cylinder body, the main cylinder body and the barrier section are all filled with magnetic fluid.

[0008] Optionally, inner installation grooves are formed on the inner walls of both sides of the main sealing sleeve. A longitudinal pressing ring is arranged in the inner installation groove. The longitudinal pressing ring is sleeved on the oil injection pipe. An inclined coil spring is sleeved on the outer wall of the middle part of the longitudinal pressing ring. The inclined coil spring is in an expanded state. A circulation area is arranged on the side of the longitudinal pressing ring close to the spacer ring, and magnetic fluid can flow into the circulation area. Two sealing rings I are fixedly installed on the inner wall of the longitudinal pressing ring, and the inner walls of the two sealing rings I are both in contact with the outer wall of the oil injection pipe.

[0009] Optionally, transverse pressing rings are arranged on both sides of the main sealing sleeve, and the transverse pressing rings are fixedly connected to the outer wall of the main sealing sleeve through bolts. An inner ring is fixedly installed on the inner wall of the transverse pressing ring. A plurality of spring I are fixedly installed on the inner wall of the inner ring, and the spring I are evenly distributed in the inner ring. A force-applying ring is slidably connected to the inner wall of the inner ring, and the other end of the spring I is fixedly connected to the end wall of the force-applying ring. The other end wall of the force-applying ring is in contact with the side wall of the longitudinal pressing ring.

[0010] Optionally, a side sleeve is arranged on the outside of the transverse pressing ring, and the side sleeve is fixedly connected to the transverse pressing ring through bolts. A bearing is installed on the inner wall of the side sleeve, and the oil injection pipe is rotatably connected to the side sleeve through the bearing. A sealing ring II is fixedly installed on the inner wall of the outer end of the side sleeve, and the inner wall of the sealing ring II is in contact with the outer wall of the oil injection pipe. Two sliding rings are sleeved on the outer walls of both ends of the oil injection pipe. The end walls of the two sliding rings located in the same side sleeve are respectively in contact with the inner walls of both ends of the side sleeve. A sealing ring III is fixedly installed on the inner wall of the bottom of the sliding ring, and the sealing ring III is in contact with the outer wall of the oil injection pipe. A same spring II is fixedly installed on the outer walls of the two sliding rings located at the same end, and the spring II is in a compressed state.

[0011] Optionally, a positioning column is rotatably connected to the inner wall of the pressing seat, a motor is fixedly installed on the outer wall of the pressing seat, and the output shaft of the motor is fixedly connected to the end wall of the positioning column. The outer wall of the positioning column can be hermetically fixed to the port of the horizontal valve through a flange. The outer wall of the main sealing sleeve is hermetically fixed to the inner wall of the oil injection cylinder. An oil injection port is opened at the top of the valve testing machine, and the oil injection port is communicated with the inside of the oil injection cylinder. A pressure gauge is fixedly installed at the top of the valve testing machine.

[0012] Optionally, a testing method for a testing device of a horizontal valve further includes the following specific operation steps: S1: Drive the valve testing machine to adjust the position of the pressing seat so that the distance between the pressing seat and the oil injection assembly is the length of the horizontal valve to be tested. Use a sealing flange to hermetically fix one end of the horizontal valve to the positioning column, and at the same time hermetically connect the other end of the horizontal valve to the pipe orifice of the oil injection pipe through a sealing flange; S2: Inject high-pressure gas into the main cylinder through the air injection hole, so that the bottom of the double-headed plunger presses down the magnetorheological fluid, introduce the magnetorheological fluid in the main cylinder into the blocking area, and fill the blocking area with magnetorheological fluid. After that, the oil injection port is externally connected to an oil pump and hydraulic oil is injected into the oil injection cylinder; S3: While injecting oil, drive the motor to drive the positioning column to rotate, thereby driving the valve to be tested and the oil injection pipe to rotate, so as to realize the rotation of hydraulic oil into the valve to be tested. Under the action of centrifugal force, the hydraulic oil moves on the inner wall of the valve to be tested. At this time, by observing whether there is oil leakage on the surface of the valve to be tested, it can be judged whether there are gaps inside the valve to be tested. After a period of time, by observing the index of the pressure gauge, it can be judged whether the valve reaches the pressure standard. At the same time, the concentricity of the valve to be tested can be detected when it rotates; S4: During the process of oil injection, since the oil injection pipe is connected to the valve to be tested and rotates synchronously, under the action of gravity, relative movement will occur between the oil injection pipe and the main sealing sleeve, the longitudinal pressure ring, the transverse pressure ring, the side sleeve and each sealing ring, resulting in fine gaps. At this time, the second spring can push the sliding ring outwards, thereby applying a thrust to the third sealing ring, reducing the gap between the third sealing ring and the oil injection pipe, that is, reducing the amount of sealing oil flowing into the side sleeve; S5: Under the elastic force of the inclined spring, the inclined spring can squeeze the flexible longitudinal pressure ring inwards, that is, apply a longitudinal force to the longitudinal pressure ring, so that the longitudinal pressure ring tightly presses the oil injection pipe longitudinally. At the same time, under the elastic force of the first spring, the first spring can push the longitudinal pressure ring inwards through the force application ring, that is, apply a transverse force to the longitudinal pressure ring, so that the longitudinal pressure ring tightly presses the oil injection pipe transversely, reducing the gap between the first sealing ring and the oil injection pipe again or achieving sealing, that is, reducing the amount of sealing oil flowing into the main sealing sleeve to a very small amount or completely stopping the inflow; S6: If there is still some seal oil flowing into the main seal sleeve through the gap between the first seal ring and the oil injection pipe, at this time, a constant air pressure is applied to the main cylinder body through an air pump, so that the ferrofluid in the blocking area can flow into the gap between the first seal ring and the oil injection pipe, making the first seal ring and the oil injection pipe sealed. At the same time, the ferrofluid in the main cylinder body can be replenished into the blocking area, making the blocking area sealed, thereby further preventing the seal oil from flowing out and realizing the dynamic seal of the whole device.

[0013] Compared with the prior art, the present invention has at least the following beneficial effects:

[0014] In the above solution, by setting the oil injection assembly and the positioning column, after installing the valve to be tested on the test device, high-pressure gas is injected into the main cylinder body through the air injection hole, so that the bottom of the double-headed plunger presses down the ferrofluid, guiding the ferrofluid in the main cylinder body into the blocking area and filling the blocking area with ferrofluid. Then, an oil pump is externally connected to the oil injection port and hydraulic oil is injected into the oil injection cylinder, and at the same time as injecting oil, the motor is driven to drive the positioning column to rotate, thereby driving the valve to be tested and the oil injection pipe to rotate, realizing the rotation and introduction of hydraulic oil into the valve to be tested. Under the action of centrifugal force, the hydraulic oil moves on the inner wall of the valve to be tested. At this time, by observing whether there is oil leakage on the surface of the valve to be tested, it can be judged whether there is a gap inside the valve to be tested. After a period of time, by observing the index of the pressure gauge, it can be judged whether the valve reaches the pressure standard, and at the same time, the concentricity of the valve to be tested can be detected when it rotates.

[0015] By setting the longitudinal pressure ring and the transverse pressure ring, under the elastic force of the inclined coil spring, the inclined coil spring can squeeze the flexible longitudinal pressure ring inward, that is, apply a longitudinal force to the longitudinal pressure ring, making the longitudinal pressure ring tightly press the oil injection pipe longitudinally. At the same time, under the elastic force of the first spring, the first spring can push the longitudinal pressure ring inward through the force application ring, that is, apply a transverse force to the longitudinal pressure ring, making the longitudinal pressure ring tightly press the oil injection pipe transversely, making the gap between the first seal ring and the oil injection pipe smaller again or sealed, that is, the seal oil flowing into the main seal sleeve becomes very little or does not flow in at all.

[0016] By setting the blocking area and the magnetic replenishment mechanism, a constant air pressure is applied to the main cylinder body through an air pump, so that the ferrofluid in the blocking area can flow into the gap between the first seal ring and the oil injection pipe, making the first seal ring and the oil injection pipe sealed. At the same time, the ferrofluid in the main cylinder body can be replenished into the blocking area, making the blocking area sealed, thereby further preventing the seal oil from flowing out and realizing the dynamic seal of the whole device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings incorporated herein and constituting a part of the specification illustrate embodiments of the present invention and, together with the specification, are further used to explain the principles of the present invention and enable those skilled in the relevant art to implement and use the present invention.

[0018] Figure 1 Schematic diagram of the three-dimensional structure of a testing device and a testing method for a horizontal valve Figure 2 Schematic diagram of the structure of the oil injection assembly Figure 3 Exploded sectional view of the oil injection assembly Figure 4 Planar sectional view of the components inside the main seal sleeve Figure 5 Assembly drawing of the transverse pressure ring and the main seal sleeve Figure 6 Exploded view of the components inside the transverse pressure ring Figure 7 Exploded view inside the main seal sleeve Figure 8 For Figure 7 Enlarged view of part A in Figure 9 Assembly drawing of the main seal sleeve and the magnetic compensation mechanism Figure 10 Schematic assembly diagram of the longitudinal pressure ring and the main seal sleeve Figure 11 Schematic diagram of the structure of the magnetic compensation mechanism Figure 12 Schematic diagram of the structure of the pressure seat Figure 13 Connection diagram of the oil injection cylinder and the oil injection port Figure 14 Schematic assembly diagram of the oil injection assembly and the oil injection cylinder

[0019] Reference numerals: Oil injection assembly 100, main seal sleeve 110, L-shaped groove 111, internal installation groove 112, oil injection pipe 113, spacer ring 114, barrier section 115, permanent magnet ring 116, magnetic compensation mechanism 120, main cylinder body 121, baffle 122, double-headed plunger 123, air injection hole 124, secondary cylinder body 125, check valve 126, piston 127, elastic pressure head 128, longitudinal pressure ring 130, inclined coil spring 131, flow-through area 132, seal ring one 133, transverse pressure ring 140, internal ring 141, spring one 142, force application ring 143, side sleeve 150, bearing 151, seal ring two 152, slip ring 153, seal ring three 154, spring two 155, valve testing press 200, pressure seat 210, positioning post 211, motor 212, oil injection cylinder 220, oil injection port 221, pressure gauge 222

[0020] As shown in the figure, in order to clearly implement the structure of the embodiments of the present invention, specific structures and devices are marked in the figure. However, this is only for illustrative purposes and is not intended to limit the present invention to this specific structure, device, and environment. Those of ordinary skill in the art can adjust or modify these devices and environments according to specific needs. Detailed implementation manners

[0021] The following describes in detail a testing device and a testing method for a horizontal valve provided by the present invention in conjunction with the accompanying drawings and specific embodiments. At the same time, it should be noted here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments. For some well-known technologies, those skilled in the art can also adopt other alternative methods for implementation; moreover, the accompanying drawings are only for more specifically describing the embodiments and are not intended to specifically limit the present invention.

[0022] As Figures 1 to 14As shown, an embodiment of the present invention provides a testing device for a horizontal valve, including an oil injection assembly 100 and a valve testing press 200. A pressure seat 210 is slidably arranged on the left side of the valve testing press 200, and an oil injection cylinder 220 is fixedly installed on the right side of the valve testing press 200. The oil injection assembly 100 includes a main sealing sleeve 110. Three groups of L-shaped grooves 111 are evenly formed on the outer wall of the middle part of the main sealing sleeve 110, and the bottom of the L-shaped grooves 111 communicates with the inside of the main sealing sleeve 110. An oil injection pipe 113 is arranged inside the main sealing sleeve 110. One end of the oil injection pipe 113 communicates with the pressure seat 210, and the other end communicates with the oil injection cylinder 220. A magnetic supplement mechanism 120 is arranged in each of the three groups of L-shaped grooves 111. In the present invention, the valve testing press 200 is driven to adjust the position of the pressure seat 210 so that the distance between the pressure seat 210 and the oil injection assembly 100 is the length of the horizontal valve to be tested. One end of the horizontal valve is hermetically and fixedly connected to the positioning column 211 by using a sealing flange, and at the same time, the other end of the horizontal valve is hermetically communicated with the pipe orifice of the oil injection pipe 113 through a sealing flange. High-pressure gas is injected into the main cylinder 121 through the air injection hole 124. Particularly, the high-pressure gas injected into the main cylinder 121 through the air injection hole 124 is generally in the range of 0.4 - 0.5 Mpa. The bottom of the double-headed plunger 123 presses down the magnetic fluid, guiding the magnetic fluid in the main cylinder 121 into the barrier section 115 and filling the barrier section 115 with magnetic fluid. And generally, each barrier section 115 can withstand a pressure difference greater than 0.15 - 0.2 atmospheric pressures. After that, an external oil pump is connected to the oil injection port 221 and hydraulic oil is injected into the oil injection cylinder 220. The driving motor 212 is used to drive the positioning column 211 to rotate, thereby driving the valve to be tested and the oil injection pipe 113 to rotate. Under the action of centrifugal force, the hydraulic oil moves on the inner wall of the valve to be tested. At this time, by observing whether there is oil leakage on the surface of the valve to be tested, it can be judged whether there are gaps inside the valve to be tested. After a period of time, by observing the index of the pressure gauge 222, it can be judged whether the valve reaches the pressure standard. At the same time, the concentricity of the valve to be tested can be detected when it rotates.

[0023] As an implementation manner in this embodiment, as Figure 4 、 Figures 9 to 11As shown, multiple spacer rings 114 are evenly and fixedly installed on the outer wall of the middle part of the oil injection pipe 113 located inside the main sealing sleeve 110. The adjacent two spacer rings 114 and the inside of the main sealing sleeve 110 form a blocking interval 115. Setting the blocking interval 115 can better control the flow of the magnetic fluid. A permanent magnet ring 116 is fixedly installed on the inner wall of the main sealing sleeve 110. The permanent magnet ring 116 can control the movement of the magnetic fluid, making it better squeeze the oil injection pipe 113 and improving the sealing effect. The magnetic replenishment mechanism 120 includes a main cylinder body 121. The main cylinder body 121 is fixedly connected to the inner wall of the L-shaped groove 111. The main cylinder body 121 and the auxiliary cylinder body 125 can seal the inside of the L-shaped groove 111, and the bottom of the main cylinder body 121 is communicated with the inside of the blocking interval 115. A baffle 122 is fixedly installed on the inner wall of the top of the main cylinder body 121. A double-headed plunger 123 is slidably connected to the inner wall of the baffle 122. The baffle 122 can limit the movement of the double-headed plunger 123, and both ends of the double-headed plunger 123 are hermetically and slidably connected to the inner wall of the main cylinder body 121. An air injection hole 124 is opened at the top of the main cylinder body 121. An auxiliary cylinder body 125 is fixedly installed on the inner wall of the L-shaped groove 111. The auxiliary cylinder body 125 is communicated with the main cylinder body 121, and a one-way valve 126 is fixedly installed at the communication part. The auxiliary cylinder body 125 can play a role in replenishing the magnetic fluid in the main cylinder body 121. When the magnetic fluid in the main cylinder body 121 is insufficient, by pressing down the elastic pressing head 128 to drive the piston 127 to squeeze the magnetic fluid, the magnetic fluid in the auxiliary cylinder body 125 can pass through the one-way valve 126 and enter the main cylinder body 121. The piston 127 is hermetically and slidably connected to the inner wall of the auxiliary cylinder body 125. An elastic pressing head 128 is slidably connected to the inner wall of the top of the auxiliary cylinder body 125, and the bottom of the elastic pressing head 128 is connected to the piston 127. The inside of the auxiliary cylinder body 125, the main cylinder body 121, and the blocking interval 115 are all filled with magnetic fluid. In the present invention, if part of the sealing oil flows into the main sealing sleeve 110 through the gap between the first sealing ring 133 and the oil injection pipe 113, at this time, a constant air pressure is applied to the main cylinder body 121 through an air pump, so that the magnetic fluid in the blocking interval 115 can flow into the gap between the first sealing ring 133 and the oil injection pipe 113 to seal the first sealing ring 133 and the oil injection pipe 113. At the same time, the magnetic fluid in the main cylinder body 121 can be replenished into the blocking interval 115 to seal the blocking interval 115, thereby further preventing the sealing oil from flowing out and realizing the dynamic sealing of the entire device.

[0024] In this embodiment, as Figure 8 and Figure 10As shown in the figure, inner mounting grooves 112 are formed on the inner walls on both sides of the main seal sleeve 110. A longitudinal pressure ring 130 is arranged in the inner mounting groove 112. The longitudinal pressure ring 130 is sleeved on the oil injection pipe 113. An inclined coil spring 131 is sleeved on the outer wall of the middle part of the longitudinal pressure ring 130. The inclined coil spring 131 is in an expanded state. The longitudinal pressure ring 130 is made of a flexible material and can be deformed under the elastic force of the inclined coil spring 131 to tightly press the oil injection pipe 113. A circulation area 132 is arranged on the side of the longitudinal pressure ring 130 close to the partition ring 114, and the magnetorheological fluid can flow into the circulation area 132. The circulation area 132 can buffer the magnetorheological fluid, reduce the thrust of the magnetorheological fluid on the longitudinal pressure ring 130, and thus reduce the influence on the force application ring 143. Two sets of first seal rings 133 are fixedly installed on the inner wall of the longitudinal pressure ring 130, and the inner walls of the two sets of first seal rings 133 are in contact with the outer wall of the oil injection pipe 113. Transverse pressure rings 140 are arranged on both sides of the main seal sleeve 110, and the transverse pressure rings 140 are fixedly connected to the outer wall of the main seal sleeve 110 through bolts. An inner ring 141 is fixedly installed on the inner wall of the transverse pressure ring 140. A first spring 142 is fixedly installed on the inner wall of the inner ring 141. There are multiple sets of the first springs 142, and they are evenly distributed in the inner ring 141. A force application ring 143 is slidably connected to the inner wall of the inner ring 141, and the other end of the first spring 142 is fixedly connected to the end wall of the force application ring 143. The other end wall of the force application ring 143 is in contact with the side wall of the longitudinal pressure ring 130. In the present invention, under the elastic force of the inclined coil spring 131, the inclined coil spring 131 can squeeze the flexible longitudinal pressure ring 130 inward, that is, apply a longitudinal force to the longitudinal pressure ring 130, so that the longitudinal pressure ring 130 tightly presses the oil injection pipe 113 longitudinally. At the same time, under the elastic force of the first spring 142, the first spring 142 can push the longitudinal pressure ring 130 inward through the force application ring 143, that is, apply a transverse force to the longitudinal pressure ring 130, so that the longitudinal pressure ring 130 tightly presses the oil injection pipe 113 transversely, making the gap between the first seal ring 133 and the oil injection pipe 113 become smaller again or achieve sealing, that is, the sealing oil flowing into the main seal sleeve 110 becomes extremely little or does not flow in at all.

[0025] As an implementation manner in this embodiment, as Figures 5 to 7As shown in the figure, a side sleeve 150 is provided outside the horizontal pressing ring 140, and the side sleeve 150 is fixedly connected to the horizontal pressing ring 140 by bolts. A bearing 151 is installed on the inner wall of the side sleeve 150, and the oil injection pipe 113 is rotatably connected to the side sleeve 150 through the bearing 151. A second sealing ring 152 is fixedly installed on the inner end wall of the side sleeve 150, and the inner wall of the second sealing ring 152 contacts the outer wall of the oil injection pipe 113. The second sealing ring 152 can achieve preliminary sealing. Two sets of sliding rings 153 are sleeved on the outer walls at both ends of the oil injection pipe 113. The end walls of the two sets of sliding rings 153 located in the same side sleeve 150 contact the inner walls at both ends of the side sleeve 150 respectively. A third sealing ring 154 is fixedly installed on the inner bottom wall of the sliding ring 153, and the third sealing ring 154 contacts the outer wall of the oil injection pipe 113. The third sealing ring 154 can perform secondary sealing. The outer walls of the two sets of sliding rings 153 located at the same end are fixedly installed with the same set of second springs 155, and the second springs 155 are in a compressed state. In the present invention, the second springs 155 can push the sliding rings 153 outwards, thereby applying a thrust to the third sealing ring 154, reducing the gap between the third sealing ring 154 and the oil injection pipe 113, that is, reducing the amount of sealing oil flowing into the side sleeve 150.

[0026] As an implementation manner in this embodiment, as Figure 1 、 Figures 12 to 14 shown, a positioning column 211 is rotatably connected to the inner wall of the pressure seat 210. A motor 212 is fixedly installed on the outer wall of the pressure seat 210, and the output shaft of the motor 212 is fixedly connected to the end wall of the positioning column 211. The outer wall of the positioning column 211 can be fixedly and sealedly connected to the port of the horizontal valve through a flange. The outer wall of the main sealing sleeve 110 is fixedly and sealedly connected to the inner wall of the oil injection cylinder 220. By inserting the main sealing sleeve 110 into the oil injection cylinder 220, sealing can be achieved through sealant thereafter. An oil injection port 221 is opened at the top of the valve testing press 200, and the oil injection port 221 communicates with the inside of the oil injection cylinder 220. By injecting sealing oil into the oil injection port 221, the sealing oil can flow into the oil injection pipe 113 in the oil injection cylinder 220. A pressure gauge 222 is fixedly installed on the top of the valve testing press 200. In the present invention, while injecting oil, the motor 212 is driven to drive the positioning column 211 to rotate, thereby driving the valve under test and the oil injection pipe 113 to rotate, realizing the rotation and introduction of hydraulic oil into the valve under test. Under the action of centrifugal force, the hydraulic oil moves on the inner wall of the valve under test. At this time, by observing whether there is oil leakage on the surface of the valve under test, it can be judged whether there are gaps inside the valve under test. After a period of time, by observing the index of the pressure gauge 222, it can be judged whether the valve reaches the pressure standard, and at the same time, the concentricity of the valve under test can be detected while it is rotating.

[0027] The working method of the technical solution provided by the present invention is as follows: S1: Drive the valve testing press 200 to adjust the position of the pressure seat 210 so that the distance between the pressure seat 210 and the oil injection assembly 100 is the length of the horizontal valve to be tested. Use the sealing flange to fixedly seal one end of the horizontal valve with the positioning column 211, and at the same time, seal and communicate the other end of the horizontal valve with the nozzle of the oil injection pipe 113 through the sealing flange; S2: Inject high-pressure gas into the main cylinder 121 through the air injection hole 124, so that the bottom of the double-headed plunger 123 presses down the magnetorheological fluid, introduce the magnetorheological fluid in the main cylinder 121 into the barrier section 115, and fill the barrier section 115 with magnetorheological fluid. After that, the oil injection port 221 is externally connected to an oil pump and hydraulic oil is injected into the oil injection cylinder 220; S3: While injecting oil, drive the motor 212 to drive the positioning column 211 to rotate, thereby driving the valve to be tested and the oil injection pipe 113 to rotate, so as to realize the rotation of the hydraulic oil into the valve to be tested. Under the action of centrifugal force, the hydraulic oil moves on the inner wall of the valve to be tested. At this time, by observing whether there is oil leakage on the surface of the valve to be tested, it can be judged whether there is a gap inside the valve to be tested. After a period of time, by observing the index of the pressure gauge 222, it can be judged whether the valve reaches the pressure standard, and the concentricity of the valve to be tested can be detected while it is rotating; S4: During the oil injection process, since the oil injection pipe 113 is connected to the valve to be tested and rotates synchronously, under the action of gravity, relative movement will occur between the oil injection pipe 113 and the main sealing sleeve 110, the longitudinal pressure ring 130, the transverse pressure ring 140, the side sleeve 150 and each sealing ring, resulting in fine gaps. At this time, the second spring 155 can push the sliding ring 153 outwards, thereby applying a thrust to the third sealing ring 154, reducing the gap between the third sealing ring 154 and the oil injection pipe 113, that is, reducing the amount of sealing oil flowing into the side sleeve 150; S5: Under the elastic force of the inclined spring 131, the inclined spring 131 can squeeze the flexible longitudinal pressure ring 130 inwards, that is, apply a longitudinal force to the longitudinal pressure ring 130, so that the longitudinal pressure ring 130 tightly presses the oil injection pipe 113 longitudinally. At the same time, under the elastic force of the first spring 142, the first spring 142 can push the longitudinal pressure ring 130 inwards through the force application ring 143, that is, apply a transverse force to the longitudinal pressure ring 130, so that the longitudinal pressure ring 130 tightly presses the oil injection pipe 113 transversely, reducing the gap between the first sealing ring 133 and the oil injection pipe 113 again or achieving sealing, that is, reducing the amount of sealing oil flowing into the main sealing sleeve 110 to be extremely small or not flowing in at all; S6: If there is still some sealing oil flowing into the main sealing sleeve 110 through the gap between the first sealing ring 133 and the oil injection pipe 113, at this time, a constant air pressure is applied to the main cylinder body 121 through an air pump, so that the ferrofluid in the blocking section 115 can flow into the gap between the first sealing ring 133 and the oil injection pipe 113, making the first sealing ring 133 and the oil injection pipe 113 sealed. At the same time, the ferrofluid in the main cylinder body 121 can be replenished into the blocking section 115, making the blocking section 115 sealed, thereby further preventing the sealing oil from flowing out and realizing the dynamic sealing of the entire device.

[0028] The connection method of the oil injection assembly 100 provided by the present invention and the oil injection cylinder 220 is as follows: Insert the oil injection pipe 113 equipped with the spacer ring 114 into the main sealing sleeve 110 and make it symmetrical about the central plane of the main sealing sleeve 110. Then, install two sets of longitudinal pressure rings 130 equipped with inclined coil springs 131 into the main sealing sleeve 110, making the first sealing ring 133 closely adhere to the oil injection pipe 113. Then, install the transverse pressure ring 140 onto the main sealing sleeve 110 through bolts. Finally, insert the side sleeve 150 and fix it to the transverse pressure ring 140 through bolts. Then, insert the oil injection assembly 100 into the oil injection cylinder 220 and seal it by injecting sealant.

[0029] The present invention covers any substitutions, modifications, equivalent methods, and solutions made within the essence and scope of the present invention. To enable the public to have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention. However, those skilled in the art can fully understand the present invention without these detailed descriptions. Additionally, to avoid unnecessary confusion to the essence of the present invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0030] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A horizontal valve testing device, comprising an oil injection assembly (100) and a valve pressure testing machine (200), characterized in that: A pressure seat (210) is slidably arranged on the left side of the valve pressure tester (200), and an oil filling cylinder (220) is fixedly installed on the right side of the valve pressure tester (200). The oil filling assembly (100) comprises a main sealing sleeve (110), three groups of L-shaped grooves (111) are evenly arranged on the outer wall of the middle part of the main sealing sleeve (110), and the bottom of the L-shaped groove (111) is connected to the inside of the main sealing sleeve (110). An oil filling pipe (113) is arranged inside the main sealing sleeve (110), one end of the oil filling pipe (113) is connected to the pressure seat (210), and the other end is connected to the oil filling cylinder (220), and a magnetizing mechanism (120) is arranged in each of the three groups of L-shaped grooves (111).

2. A horizontal valve testing device according to claim 1, characterized in that: A plurality of groups of spacer rings (114) are evenly and fixedly mounted on the outer wall of the middle portion of the oil filling pipe (113) located inside the main sealing sleeve (110), and two adjacent groups of spacer rings (114) and the inside of the main sealing sleeve (110) form a barrier zone (115). A permanent magnet ring (116) is fixedly mounted on the inner wall of the main sealing sleeve (110). The magnetizing mechanism (120) comprises a main cylinder (121), the main cylinder (121) is fixedly connected to the inner wall of the L-shaped groove (111), and the bottom of the main cylinder (121) is connected to the inside of the barrier zone (115). A baffle (122) is fixedly mounted on the inner wall of the top of the main cylinder (121), and a double-headed plunger (123) is slidably connected to the inner wall of the baffle (122). , and both ends of the double-headed plunger (123) are sealingly and slidably connected to the inner wall of the main cylinder (121), the top of the main cylinder (121) is provided with an air injection hole (124), the inner wall of the L-shaped groove (111) is fixedly mounted with a sub-cylinder (125), the sub-cylinder (125) is connected to the main cylinder (121), and a one-way valve (126) is fixedly mounted at the connection point, the inner wall of the sub-cylinder (125) is sealingly and slidably connected to a piston (127), the inner wall of the top of the sub-cylinder (125) is slidably connected with an elastic pressure head (128), and the bottom of the elastic pressure head (128) is connected to the piston (127), and the sub-cylinder (125), the main cylinder (121) and the blocking zone (115) are all filled with magnetic fluid.

3. A horizontal valve testing device according to claim 2, characterized in that: The inner walls on both sides of the main sealing sleeve (110) are provided with inner grooves (112), and a longitudinal pressure ring (130) is arranged in the inner groove (112). The longitudinal pressure ring (130) is sleeved on the oil injection pipe (113), and a bevel coil spring (131) is sleeved on the outer wall of the middle part of the longitudinal pressure ring (130). The bevel coil spring (131) is in an expanded state. The longitudinal pressure ring (130) is provided with a flow area (132) close to the spacer ring (114), and the magnetic fluid can flow into the flow area (132). Two sets of sealing rings (133) are fixedly installed on the inner wall of the longitudinal pressure ring (130), and the inner walls of the two sets of sealing rings (133) are in contact with the outer wall of the oil injection pipe (113).

4. A horizontal valve testing device according to claim 3, characterized in that: A transverse pressure ring (140) is provided on both sides of the main sealing sleeve (110), and the transverse pressure ring (140) is fixedly connected to the outer wall of the main sealing sleeve (110) by bolts. An inner ring (141) is fixedly installed on the inner wall of the transverse pressure ring (140), and a spring 1 (142) is fixedly installed on the inner wall of the inner ring (141). The spring 1 (142) is provided in multiple groups and is evenly distributed in the inner ring (141). A force ring (143) is slidably connected to the inner wall of the inner ring (141), and the other end of the spring 1 (142) is fixedly connected to the end wall of the force ring (143), and the other end wall of the force ring (143) contacts the side wall of the longitudinal pressure ring (130).

5. A horizontal valve testing device according to claim 4, characterized in that: A side sleeve (150) is arranged outside the transverse pressure ring (140), and the side sleeve (150) is fixedly connected to the transverse pressure ring (140) by bolts. A bearing (151) is installed on the inner wall of the side sleeve (150), and the oil injection pipe (113) is rotatably connected to the side sleeve (150) by the bearing (151). A sealing ring 2 (152) is fixedly installed on the inner wall of the outer end of the side sleeve (150), and the inner wall of the sealing ring 2 (152) contacts the outer wall of the oil injection pipe (113). 13) Two sets of slip rings (153) are sleeved on the outer walls at both ends, and the end walls of the two sets of slip rings (153) located in the same side sleeve (150) are respectively in contact with the inner walls at both ends of the side sleeve (150), and a sealing ring three (154) is fixedly installed on the inner wall of the bottom of the slip ring (153), and the sealing ring three (154) is in contact with the outer wall of the oil injection pipe (113), and the outer walls of the two sets of slip rings (153) located at the same end are fixedly installed with the same set of springs two (155), and the springs two (155) are in a compressed state.

6. A horizontal valve testing device according to claim 5, characterized in that: The inner wall of the pressure seat (210) is rotatably connected to a positioning column (211), the outer wall of the pressure seat (210) is fixedly mounted with a motor (212), and the output shaft of the motor (212) is fixedly connected to the end wall of the positioning column (211), the outer wall of the positioning column (211) can be sealed and fixedly connected to the port of a horizontal valve via a flange, the outer wall of the main sealing sleeve (110) is sealed and fixedly connected to the inner wall of an oil filling cylinder (220), an oil filling port (221) is provided on the top of the valve pressure tester (200), and the oil filling port (221) is communicated with the inside of the oil filling cylinder (220), and a pressure gauge (222) is fixedly mounted on the top of the valve pressure tester (200).

7. The testing method of a testing device for a horizontal valve according to claim 6, characterized in that: The specific steps are as follows: S1: driving the valve pressure test machine (200) to adjust the position of the pressure seat (210) so that the distance between the pressure seat (210) and the oil injection assembly (100) is equal to the length of the horizontal valve to be tested, and sealingly fixing one end of the horizontal valve to the positioning column (211) by using a sealing flange, and sealingly connecting the other end of the horizontal valve to the pipe opening of the oil injection pipe (113) through the sealing flange; S2: High-pressure gas is injected into the main cylinder (121) through the gas injection hole (124), so that the bottom of the double-headed plunger (123) presses down the magnetic fluid, and the magnetic fluid in the main cylinder (121) is introduced into the blocking section (115), and the blocking section (115) is filled with the magnetic fluid. Thereafter, the oil injection port (221) is connected to an external oil pump and hydraulic oil is injected into the oil injection cylinder (220); S3: while injecting oil, driving the motor (212) to drive the positioning column (211) to rotate, thereby driving the valve to be tested and the oil injection pipe (113) to rotate, so as to realize the rotation of the hydraulic oil into the valve to be tested. Under the action of centrifugal force, the hydraulic oil moves on the inner wall of the valve to be tested. At this time, by observing whether the surface wall of the valve to be tested leaks oil, it can be determined whether there is a gap inside the valve to be tested. After a period of time, by observing the index of the pressure gauge (222), it can be determined whether the valve meets the pressure standard. At the same time, the concentricity of the valve to be tested can be detected when it rotates; S4: During the oil flow process, since the oil injection pipe (113) is connected to the valve to be tested and rotates synchronously, under the action of gravity, the oil injection pipe (113) and the main sealing sleeve (110), the longitudinal pressure ring (130), the transverse pressure ring (140), the side sleeve (150) and each sealing ring will move relative to each other, thereby forming a fine gap. At this time, the spring 2 (155) can push the sliding ring (153) outward, thereby applying a thrust to the sealing ring 3 (154), so that the gap between the sealing ring 3 (154) and the oil injection pipe (113) becomes smaller, that is, the amount of sealing oil flowing into the side sleeve (150) becomes less; S5: Under the elastic force of the bevel coil spring (131), the bevel coil spring (131) can press the flexible longitudinal pressure ring (130) inward, that is, exert a longitudinal force on the longitudinal pressure ring (130), so that the longitudinal pressure ring (130) is longitudinally pressed against the oil injection pipe (113). At the same time, under the elastic force of the spring 1 (142), the spring 1 (142) can push the longitudinal pressure ring (130) inward through the force ring (143), that is, exert a lateral force on the longitudinal pressure ring (130), so that the longitudinal pressure ring (130) is transversely pressed against the oil injection pipe (113), so that the gap between the sealing ring 1 (133) and the oil injection pipe (113) becomes smaller again or seals are achieved, that is, the sealing oil flowing into the main sealing sleeve (110) becomes very small or does not flow in at all; S6: If some sealing oil still flows into the main sealing sleeve (110) through the gap between the sealing ring 1 (133) and the oil injection pipe (113), a constant air pressure is applied to the main cylinder (121) through the air pump, so that the magnetic fluid in the barrier zone (115) can flow into the gap between the sealing ring 1 (133) and the oil injection pipe (113), so that the sealing ring 1 (133) and the oil injection pipe (113) are sealed. At the same time, the magnetic fluid in the main cylinder (121) can be replenished into the barrier zone (115), so that the barrier zone (115) is sealed, thereby further preventing the sealing oil from flowing out and realizing the dynamic sealing of the entire device.

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