Ball valve sealing performance detection device and method

Abstract

The invention relates to the technical field of sealing detection of ball valves used in electric automobiles, and discloses a ball valve sealing detection device and method, and the device comprises a detection platform which is provided with a supporting part for bearing a to-be-detected ball valve; the movable detection part and the fixed detection part are arranged on the detection table and are used for abutting against the inlet end and the outlet end of the to-be-detected ball valve in a sealing manner; the pressurizing part is connected with the movable detection part and is used for filling a detection medium into the to-be-detected ball valve; the pressure sensor is arranged in the movable detection part and is used for detecting the pressure in the ball valve to be detected; and the auxiliary detection part is used for being in contact with a handle of the to-be-detected ball valve. Static sealing performance and dynamic sealing performance detection can be carried out on the to-be-detected ball valve, detection is closer to the actual use working condition of the to-be-detected ball valve, and the detection accuracy is improved; the handle can be automatically controlled to rotate through hard contact between the auxiliary detection part and the handle, and dynamic sealing performance detection can be carried out on the ball valve to be detected through elastic contact between the auxiliary detection part and the handle.

Description

Technical Field

[0001] The present invention relates to the technical field of ball valve sealing detection used in electric vehicles, and more specifically, to a ball valve sealing detection device and method. Background Art

[0002] The ball valve is mainly composed of a valve body, a ball, a valve stem and an actuator (such as a handle, an electric actuator). Its working principle is to control the opening and closing of the valve by driving the valve stem to rotate through the actuator, and the valve stem drives the ball to rotate synchronously. Before the ball valve leaves the factory, it is necessary to conduct a sealing test on the ball valve to ensure that no leakage occurs during its use. In the field of new energy vehicles, when dissipating heat from the battery, a ball valve is usually used in the water-cooled heat dissipation pipeline to control the heat dissipation of the cooling medium. Therefore, the sealing of the ball valve is particularly important.

[0003] In the prior art, the sealing test of the ball valve is usually performed by installing the ball valve on a test frame, then filling the ball valve with gas, and immersing the ball valve together with the test frame in a water pool to determine whether there are bubbles in the water pool to test the sealing of the ball valve. The water pool needs to occupy a large space, which increases the overall volume of the test device. In addition, this test method can only detect the static sealing of the ball valve (the medium introduced is static), while the medium is usually dynamic when the ball valve is actually used. The dynamic medium will impact the ball valve and easily cause the ball valve to leak, so the accuracy of the sealing test using static media is low. Therefore, it is necessary to propose a ball valve sealing test device and method to at least partially solve the problems existing in the prior art. Summary of the invention

[0004] A series of simplified concepts are introduced in the Summary of the Invention, which will be further described in detail in the Detailed Description of the Invention. The Summary of the Invention does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the scope of protection of the claimed technical solution.

[0005] In order to at least partially solve the above problems, the present invention provides a ball valve sealing detection device, comprising:

[0006] A testing platform, on which a support portion for carrying the ball valve to be tested is provided;

[0007] The movable detection part and the fixed detection part are arranged on the detection platform and are used for sealingly contacting with the inlet end and the outlet end of the ball valve to be detected;

[0008] A pressurizing part, connected to the movable detection part, and used for filling the interior of the ball valve to be tested with a detection medium;

[0009] A pressure sensor is arranged in the movable detection part and is used to detect the pressure in the ball valve to be tested;

[0010] The auxiliary detection part is arranged above the movable detection part and is used for contacting the handle of the ball valve to be tested.

[0011] Preferably, the activity detection unit and the fixed detection unit both include:

[0012] A detection body, wherein a cylinder is provided inside the detection body, and a first through hole is provided at one end of the cylinder extending out of the detection body;

[0013] A sealing gasket, arranged at one end of the detection body in contact with the ball valve to be tested;

[0014] The detection body of the activity detection part is also provided with a second through hole, and the second through hole is used to communicate with the pressurizing part and the cylinder.

[0015] Preferably, the auxiliary detection unit includes:

[0016] A support body, on which two support blocks are arranged at intervals, and a space area for accommodating a handle is formed between the two support blocks;

[0017] A plurality of contact detection components are arranged along the length direction of the support block, and the contact detection components are used to contact the handle.

[0018] Preferably, the contact detection component comprises:

[0019] A contact control member is arranged on the support block, and one end of the contact control member extending out of the support block is provided with a contact head, and the contact head is in contact with the handle;

[0020] At least two detection members, one end of which extending out of the support block is provided with a detection head, and the detection head is arranged on a side of the contact head close to the support block;

[0021] When the handle needs to be turned, the contact control member is used to fix the position where the contact head contacts the handle;

[0022] When it is necessary to detect whether the handle has a rotational movement, the contact control member is used to make the contact head elastically contact with the handle.

[0023] Preferably, the contact control element comprises:

[0024] A control rod movably arranged in the support block, one end of which extends out of the support block and is connected to the contact head;

[0025] A permanent magnet is arranged at the end of the control rod away from the contact head;

[0026] The electromagnet, which is arranged corresponding to the permanent magnet, is arranged inside the supporting block.

[0027] Preferably, the detection element comprises:

[0028] A detection rod is movably arranged in the support block, one end of which extends out of the support block and is connected to the detection head, and the other end of which is provided with a conductive block;

[0029] A resistor rod, one end of which is in sliding contact with the conductive block; the other end of the resistor rod extending out of the support block and the conductive block are both electrically connected to the power connection part;

[0030] The second spring is connected between the detection head and the support block.

[0031] Preferably, it also includes: a detection control terminal, which is used to control the operation of the movable detection part, the fixed detection part, the pressurizing part and the auxiliary detection part, to perform a sealing test on the ball valve to be tested, and to obtain the detection data of the pressure sensor and the auxiliary detection part, so as to judge whether the sealing of the ball valve to be tested is qualified through the detection data.

[0032] A ball valve sealing detection method, comprising:

[0033] Keeping the ball valve to be tested in an open state, charging a detection medium of a set pressure into the ball valve to be tested through a pressurizing unit, and detecting the pressure change in the ball valve to be tested within a set time through a pressure sensor to obtain first detection data;

[0034] Keep the ball valve to be tested in a closed state, fill the ball valve to be tested with a detection medium of a set pressure through the pressurizing part, and detect the pressure change in the ball valve to be tested within a set time through the pressure sensor to obtain second detection data;

[0035] Determine whether both the first test data and the second test data meet the set standard. If so, the static sealing performance of the ball valve to be tested is qualified, and continue to perform dynamic sealing performance testing on the ball valve to be tested. If not, the sealing performance of the ball valve to be tested is unqualified.

[0036] Preferably, the method further includes: when the static sealing performance of the ball valve to be tested is qualified, the ball valve to be tested is maintained at multiple set openings in sequence, and at each set opening, a detection medium with a set impact force is provided into the ball valve to be tested through a pressurizing part, and an auxiliary detection part is used to detect whether the handle undergoes rotational movement. If so, the sealing performance of the ball valve to be tested is unqualified and further detection is stopped; if not, the ball valve to be tested is continued to be tested; until the handle does not undergo rotational movement at all set openings, the sealing performance of the ball valve to be tested is qualified.

[0037] Preferably, the auxiliary detection unit is used to detect whether the handle undergoes rotational motion, including:

[0038] Obtaining a plurality of detection values ​​corresponding to each contact detection component on a support block;

[0039] According to a plurality of detection values ​​on a support block, an evaluation parameter of the rotational motion of the handle is obtained;

[0040] It is determined whether the evaluation parameter is within a set threshold value. If so, the handle does not rotate. If not, the handle rotates.

[0041] Compared with the prior art, the present invention has at least the following beneficial effects:

[0042] The ball valve sealing detection device and method described in the present invention can perform static sealing detection on the ball valve to be tested through the pressure sensor and the pressurizing part, and can perform dynamic sealing detection on the ball valve to be tested through the auxiliary detection part and the pressurizing part, so that the detection is closer to the actual use condition of the ball valve to be tested, and the accuracy of the sealing detection of the ball valve to be tested is improved; by utilizing the hard contact between the auxiliary detection part and the handle, the rotation of the handle can be automatically controlled, and by utilizing the elastic contact between the auxiliary detection part and the handle, the dynamic sealing detection can be performed on the ball valve to be tested.

[0043] The ball valve sealing detection device and method described in the present invention, and other advantages, objectives and features of the present invention will be reflected in part through the following description, and in part will be understood by technicians in this field through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0045] Figure 1 It is a structural schematic diagram of the ball valve sealing detection device of the present invention;

[0046] Figure 2 It is a structural schematic diagram of the movable detection part and the fixed detection part in the ball valve sealing detection device of the present invention when they are in sealing contact with the ball valve to be tested;

[0047] Figure 3 It is a structural schematic diagram of the ball valve sealing detection device of the present invention when the auxiliary detection part is in contact with the handle;

[0048] Figure 4 It is a schematic diagram of the internal structure of the movable detection part and the fixed detection part in the ball valve sealing detection device of the present invention;

[0049] Figure 5 It is a structural schematic diagram of multiple contact detection components in the ball valve sealing detection device of the present invention;

[0050] Figure 6 It is a schematic diagram of the internal structure of the contact detection assembly when the first spring is provided in the ball valve sealing detection device of the present invention;

[0051] Figure 7 This is a schematic diagram of the internal structure of the contact detection assembly in the ball valve sealing detection device of the present invention when the first spring is not provided. DETAILED DESCRIPTION

[0052] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments so that those skilled in the art can implement the invention with reference to the description.

[0053] It should be understood that the terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0054] like Figure 1 As shown, the present invention provides a ball valve sealing detection device, comprising:

[0055] A testing platform 1, on which a supporting portion 2 for carrying a ball valve 6 to be tested is provided;

[0056] The movable detection part 3 and the fixed detection part 4 arranged on the detection platform 1 are used for sealingly contacting with the inlet end and the outlet end of the ball valve 6 to be detected;

[0057] A pressurizing part, connected to the movable detection part 3, for filling the interior of the ball valve 6 to be tested with a detection medium;

[0058] A pressure sensor, arranged in the movable detection part 3, for detecting the pressure in the ball valve 6 to be tested;

[0059] The auxiliary detection part 5 is arranged above the movable detection part 3 and is used for contacting the handle 7 of the ball valve 6 to be detected.

[0060] It also includes: a telescopic driving part arranged on the detection platform 1 , and a telescopic rod 10 of the telescopic driving part is connected to the activity detection part 3 .

[0061] A vertical driving part 11 is arranged on the detection platform 1 , and a rotation driving part 12 is arranged on the vertical driving part 11 , and the auxiliary detection part 5 is arranged on the rotation driving part 12 .

[0062] The interior of the movable detection part 3 and the fixed detection part 4 is connected to the interior of the ball valve 6 to be tested, and the detection medium is filled into the ball valve 6 to be tested through the pressurizing part and the movable detection part 3. The detection medium can be a fluid such as gas, water or hydraulic oil;

[0063] like Figure 1 As shown, before the test, the ball valve 6 to be tested is placed on the support part 2, and its outlet end is aligned with the fixed detection part 4, and then the movable detection part 3 is moved close to the ball valve 6 to be tested, as shown in FIG. Figure 2As shown, the inlet and outlet ends of the ball valve 6 to be tested are sealed by the movable detection part 3 and the fixed detection part 4;

[0064] When testing, at least three testing modes are performed;

[0065] In the first detection mode, the auxiliary detection part 5 is in hard contact with the handle 7 to control the rotation of the handle 7, such as Figure 2 As shown, the ball valve 6 to be tested is in an open state, a detection medium of a set pressure is charged into the ball valve 6 to be tested through a pressurizing part, and a pressure sensor is used to detect the pressure change in the ball valve 6 to be tested within a set time. If the pressure in the ball valve 6 to be tested does not change within the set time, it indicates that there is no leakage at the valve stem packing of the ball valve 6 to be tested. If the pressure in the ball valve 6 to be tested decreases within the set time, it indicates that there is leakage at the valve stem packing of the ball valve 6 to be tested.

[0066] In the second detection mode, the auxiliary detection part 5 is in hard contact with the handle 7 to control the rotation of the handle 7, such as Figure 3 As shown, the ball valve 6 to be tested is in a closed state, and a detection medium of a set pressure is charged into the ball valve 6 to be tested through a pressurizing part, and the pressure change in the ball valve 6 to be tested is detected by a pressure sensor within a set time. If the pressure in the ball valve 6 to be tested does not change within the set time, it indicates that there is no leakage at the connection between the ball and the valve body of the ball valve 6 to be tested. If the pressure in the ball valve 6 to be tested decreases within the set time, it indicates that there is leakage at the connection between the ball and the valve body of the ball valve 6 to be tested.

[0067] The third detection mode is to control the rotation of the handle 7 by making the auxiliary detection part 5 hard contact with the handle 7, so that the ball valve 6 to be tested can maintain multiple set openings in sequence, and the multiple set openings can be fully open, 80% open, 60% open, 40% open, 20% open and fully closed in sequence; at each set opening, the auxiliary detection part 5 is elastically contacted with the handle 7, and at the same time, a detection medium with a set impact force is provided into the ball valve 6 to be tested through the pressurizing part, and then the auxiliary detection part 5 can detect whether the handle 7 rotates. If so, the sealing of the ball valve 6 to be tested is unqualified, and the detection of the next set opening is stopped. If not, the detection of the next set opening is continued until the handle 7 does not rotate at all set openings, and the sealing of the ball valve 6 to be tested is qualified;

[0068] In the third detection mode, since the ball, valve stem and handle 7 of the ball valve 6 to be tested are connected in sequence, after the inside of the ball valve 6 to be tested is subjected to impact force, if the sealing performance of the ball is not good, it will rotate under the impact force, thereby driving the valve stem and the handle 7 to rotate synchronously; when the ball valve 6 to be tested is actually used, it needs to withstand the impact of the fluid medium. For example, when the ball valve 6 to be tested is in a fully closed state, if the ball rotates after being impacted by the fluid, the ball valve 6 to be tested will be opened, causing the fluid to leak from the outlet end of the ball valve 6 to be tested; in the third detection mode, detection is set at multiple set openings. This is because when the ball valve 6 to be tested is in a semi-open state (not fully open or fully closed), after being impacted by the fluid, the ball is more likely to rotate, which will cause the ball valve 6 to be tested to have a risk of leakage in a fully closed state. Therefore, detection is set at multiple set openings to ensure the accuracy of the sealing detection of the ball valve 6 to be tested.

[0069] The ball valve 6 to be tested can be subjected to a static sealing test through the pressure sensor and the pressurizing part, and the ball valve 6 to be tested can be subjected to a dynamic sealing test through the auxiliary detecting part 5 and the pressurizing part, so that the test is closer to the actual use condition of the ball valve 6 to be tested, and the accuracy of the sealing test of the ball valve 6 to be tested is improved; by utilizing the hard contact between the auxiliary detecting part 5 and the handle 7, the rotation of the handle 7 can be automatically controlled, and by utilizing the elastic contact between the auxiliary detecting part 5 and the handle 7, the ball valve 6 to be tested can be subjected to a dynamic sealing test.

[0070] like Figure 1 and Figure 4 As shown, in one embodiment, the activity detection unit 3 and the fixed detection unit 4 both include:

[0071] The detection body 31 has a cylinder 32 disposed therein, and one end of the cylinder 32 extending out of the detection body 31 is provided with a first through hole 33;

[0072] The sealing gasket 34 is arranged at one end of the detection body 31 in contact with the ball valve 6 to be tested; the sealing gasket 34 is in sealing contact with the inlet end and the outlet end of the ball valve 6 to be tested;

[0073] The detection body 31 of the activity detection part 3 is also provided with a second through hole 35, and the second through hole 35 is used to communicate with the pressurizing part and the cylinder 32; the second through hole 35 is connected to the pressurizing part through the tube body;

[0074] Furthermore, a third through hole 41 is provided on the detection body 31 of the fixed detection part 4, and the third through hole 41 is used to communicate with the cylinder 32 and the discharge pipe. A control valve 42 is provided at the third through hole 41; when the detection medium is water or hydraulic oil, the discharge pipe can transport the detection medium to the detection medium storage box, and when the detection medium is air, the discharge pipe can be connected to the outside atmosphere.

[0075] When conducting detection, the detection medium provided by the pressurizing part enters into the cylinder 32 of the movable detection part 3 through the second through hole 35, and then is discharged from its first through hole 33. The detection medium is filled into the ball valve 6 to be tested. When detecting in the first detection mode and the second detection mode, the control valve 42 is in a closed state. After the set time is reached, the control valve 42 opens to discharge the detection medium from the cylinder 32 and the third through hole 41 of the fixed detection part 4. When detecting in the third detection mode, the control valve 42 can remain in an open state.

[0076] like Figure 3 and Figure 5 As shown, in one embodiment, the auxiliary detection unit 5 includes:

[0077] A support body 8, on which two support blocks 81 are arranged at intervals, and a space area for accommodating the handle 7 is formed between the two support blocks 81;

[0078] A plurality of contact detection components 9 are arranged along the length direction of the support block 81 , and the contact detection components 9 are used to contact the handle 7 .

[0079] When it is necessary to control the rotation of the handle 7, the multiple contact detection components 9 maintain hard contact with the handle 7, and the auxiliary detection part 5 is controlled to rotate through the rotation drive part 12, so that the handle 7 rotates; in the third detection mode, when it is necessary to detect whether the handle 7 has a rotational movement, the multiple contact detection components 9 are in elastic contact with the handle 7; the auxiliary detection part 5 can control the rotation of the handle 7 or detect whether it has rotated, thereby improving the convenience of sealing detection of the ball valve 6 to be tested.

[0080] like Figure 6 As shown, in one embodiment, the contact detection component 9 includes:

[0081] A contact control member is arranged on the support block 81, and one end thereof extending out of the support block 81 is provided with a contact head 91, and the contact head 91 contacts the handle 7;

[0082] At least two detection members, one end of which extends out of the support block 81 is provided with a detection head 92, and the detection head 92 is arranged on a side of the contact head 91 close to the support block 81;

[0083] When the handle 7 needs to be turned, the contact control member is used to fix the position where the contact head 91 contacts the handle 7, that is, the contact head 91 contacts the side of the handle 7 rigidly;

[0084] When it is necessary to detect whether the handle 7 has a rotational motion, the contact control member is used to make the contact head 91 elastically contact with the handle 7 .

[0085] The detection member is used to detect whether the handle 7 rotates. Since the multiple contact heads 91 contact the handle 7 in sequence along the length direction of the handle 7, when the contact heads 91 are in elastic contact with the handle 7, if the handle 7 rotates, the multiple contact heads 91 on a support block 81 will be squeezed by the handle 7, thereby forming a squeezing effect on the detection head 92, and the detection member can detect the movement of the detection head 92. Since there is a difference in the squeezing effect of the rotation of the handle 7 on the multiple contact heads 91, the results of the detection by the multiple detection members can be used to know whether the handle 7 rotates. If the handle 7 squeezes the contact head 91 due to the vibration of the handle 7, the degree of squeezing of each contact head 91 on a support block 81 by the handle 7 is the same, which can be distinguished from the squeezing effect of the rotation of the handle 7 on the contact head 91, thereby ensuring the accuracy of the detection of the rotational movement of the handle 7.

[0086] like Figure 6 As shown, further, the contact control member includes:

[0087] A control rod 93 movably disposed in the support block 81, one end of which extends out of the support block 81 and is connected to the contact head 91;

[0088] A permanent magnet 94 is disposed at the end of the control rod 93 away from the contact head 91;

[0089] The electromagnet 95 , which is provided corresponding to the permanent magnet 94 , is provided inside the support block 81 .

[0090] Furthermore, a first spring 90 may be selectively provided, which is connected between the contact head 91 and the support block 81;

[0091] like Figure 6 As shown, when the first spring 90 is provided, the contact head 91 and the detection head 92 are not connected, and the two maintain a contact state, as shown in FIG. Figure 7 As shown, when the first spring 90 is not provided, the contact head 91 and the detection head 92 are connected, and the two move synchronously.

[0092] When the contact head 91 needs to be in hard contact with the handle 7, the electromagnet 95 and the permanent magnet 94 are controlled to generate a repulsive force, and the position of the contact head 91 will not change when it is subjected to the force of the handle 7; when the contact head 91 needs to be in elastic contact with the handle 7, the electromagnet 95 and the permanent magnet 94 are controlled not to generate a force, and the position of the contact head 91 can change when it is subjected to the force of the handle 7, that is, the contact head 91 can be in elastic contact with the handle 7.

[0093] like Figure 6 As shown, further, the detection element includes:

[0094] A detection rod 96 is movably disposed in the support block 81, one end of which extends out of the support block 81 and is connected to the detection head 92, and the other end of which is provided with a conductive block 97;

[0095] The resistor rod 98 has one end in sliding contact with the conductive block 97; the other end of the resistor rod 98 extending out of the support block 81 and the conductive block 97 are both electrically connected to the power connection part; wherein the power connection part is used to connect the detection control terminal to feedback the magnitude of the force applied to the contact detection component 9;

[0096] The second spring 99 is connected between the detection head 92 and the support block 81 .

[0097] The detection rod 96 and the conductive block 97 are both provided with holes for the resistance rod 98 to slide, and the resistance rod 98 is fixedly connected to the support block 81; when the contact head 91 is in elastic contact with the handle 7, after the contact head 91 is subjected to a force, the detection head 92 is also subjected to a force, so that the detection rod 96 and the conductive block 97 are simultaneously moved to the side away from the support block 81, and the conductive block 97 and the resistance rod 98 are both electrically connected to the power connection part, then the resistance of the resistance rod 98 connected to the circuit is reduced, and the resistance value of the resistance rod 98 connected to the circuit can be used to know the force exerted by the handle 7 on the contact head 91, thereby realizing the detection of the handle 7.

[0098] In one embodiment, it also includes: a detection control terminal, which is used to control the operation of the movable detection part 3, the fixed detection part 4, the pressurizing part and the auxiliary detection part 5, to perform a sealing test on the ball valve 6 to be tested, and to obtain the detection data of the pressure sensor and the auxiliary detection part 5, so as to determine whether the sealing of the ball valve 6 to be tested is qualified through the detection data.

[0099] The detection control terminal can control the overall detection process of the ball valve sealing detection device and feedback the detection results, making it more intelligent and convenient to use.

[0100] The present invention also provides a ball valve sealing detection method, comprising:

[0101] Keep the ball valve 6 to be tested in an open state, fill the ball valve 6 to be tested with a detection medium of a set pressure through the pressurizing part, and detect the pressure change in the ball valve 6 to be tested within a set time through the pressure sensor to obtain the first detection data;

[0102] Keep the ball valve 6 to be tested in a closed state, fill the ball valve 6 to be tested with a detection medium of a set pressure through the pressurizing part, and detect the pressure change in the ball valve 6 to be tested within a set time through the pressure sensor to obtain second detection data;

[0103] It is determined whether the first test data and the second test data both meet the set standard. If so, the static sealing performance of the ball valve 6 to be tested is qualified, and the ball valve 6 to be tested is further subjected to dynamic sealing performance testing. If not, the sealing performance of the ball valve 6 to be tested is unqualified.

[0104] By means of the above detection method, the static sealing property of the ball valve 6 to be detected can be detected, thereby detecting whether the valve stem packing of the ball valve 6 to be detected is leaking and the sealing property between the ball and the valve body.

[0105] Furthermore, it also includes: when the static sealing performance of the ball valve 6 to be tested is qualified, the ball valve 6 to be tested is maintained at multiple set openings in sequence, and at each set opening, a detection medium with a set impact force is provided into the ball valve 6 to be tested through the pressurizing part, and the auxiliary detection part 5 is used to detect whether the handle 7 rotates. If so, the sealing performance of the ball valve 6 to be tested is unqualified and the detection is stopped. If not, the ball valve 6 to be tested is continuously tested; until the handle 7 does not rotate at all set openings, the sealing performance of the ball valve 6 to be tested is qualified.

[0106] The auxiliary detection part 5 is in hard contact with the handle 7 to control the rotation of the handle 7, so that the ball valve 6 to be tested can maintain multiple set openings in sequence, and the multiple set openings can be fully open, 80% open, 60% open, 40% open, 20% open and fully closed in sequence; at each set opening, the auxiliary detection part 5 is elastically in contact with the handle 7, and at the same time, a detection medium with a set impact force is provided into the ball valve 6 to be tested through the pressurizing part, so that the auxiliary detection part 5 can detect whether the handle 7 has a rotational movement;

[0107] Since the ball, valve stem and handle 7 of the ball valve 6 to be tested are connected in sequence, after the ball valve 6 to be tested is subjected to impact force, if the sealing performance of the ball is not good, it will rotate under the impact force, thereby driving the valve stem and handle 7 to rotate synchronously; when the ball valve 6 to be tested is actually used, it needs to withstand the impact of the fluid medium. For example, when the ball valve 6 to be tested is in a fully closed state, if the ball rotates after being impacted by the fluid, the ball valve 6 to be tested will be opened, causing the fluid to leak from the outlet end of the ball valve 6 to be tested; in the third detection mode, detection is set at multiple set openings. This is because the ball valve 6 to be tested is in a semi-open state (not fully open or fully closed), and after being impacted by the fluid, the ball is more likely to rotate, which will cause the ball valve 6 to be tested to have a risk of leakage in a fully closed state. Therefore, detection is set at multiple set openings to ensure the accuracy of the sealing detection of the ball valve 6 to be tested.

[0108] Furthermore, the auxiliary detection unit 5 is used to detect whether the handle 7 undergoes rotational motion, including:

[0109] Obtaining a plurality of detection values ​​corresponding to each contact detection component 9 on a support block 81;

[0110] During the inspection, the multiple contact detection components 9 on each support block 81 may be inspected separately;

[0111] According to a plurality of detection values ​​on a support block 81, an evaluation parameter of the rotational movement of the handle 7 is obtained;

[0112] Among them, the calculation formula of the evaluation parameter P is:

[0113]

[0114] Among them, exp is an exponential function with the natural constant e as the base, W 0 is the adjustment coefficient, which is used to adjust the formula as a whole to ensure the accuracy of the calculation. i is the detection value corresponding to the i-th contact detection component 9, R i0 is the initial value corresponding to the i-th contact detection component 9, |R i -R i0 | for R i and R i0 The absolute value of the difference, W i is the weight value corresponding to the i-th contact detection component 9, n is the number of detection values, i=1, 2, ..., n;

[0115] |R i -R i0 | It can represent the difference in contact force between each contact detection component 9 and the handle 7 when it is in initial elastic contact and when it is subjected to the impact force of the detection medium, W i Indicates the weight value corresponding to each contact detection component 9. The weight value of the contact detection component 9 that is farther away from the rotation center of the handle 7 can be set to be larger. This is because after the handle 7 rotates, the contact detection component 9 that is farther away from its rotation center is more obviously squeezed. Therefore, the setting of the weight value can amplify the detection result and improve the accuracy of the detection result;

[0116] Alternatively, the calculation formula of the evaluation parameter P is:

[0117]

[0118] Where n is the number of detection values, is the average of multiple test values, R i is the detection value corresponding to the i-th contact detection component 9, n is the number of detection values, i=1, 2, ..., n;

[0119] In this calculation method, the smaller the value of the evaluation parameter is, the better the consistency of the detection values ​​corresponding to the multiple contact detection components 9 is, and the smaller the possibility of the handle 7 rotating.

[0120] It is determined whether the evaluation parameter is within the set threshold. If so, the handle 7 does not rotate. If not, the handle 7 rotates.

[0121] In the above method, since the handle 7 exerts the same force on the multiple contact detection components 9 on both sides when there is no rotational motion (when it is static or the ball valve 6 to be tested is vibrating as a whole), the calculation of evaluation parameters for multiple detection values ​​on a support block 81 can obtain the consistency of the force exerted on the corresponding multiple contact detection components 9, thereby ensuring the accuracy of the detection of the rotational motion of the handle 7.

[0122] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0123] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0124] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and implementation modes. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the present invention, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A ball valve sealing detection device, characterized in that: include: A testing platform (1) is provided with a supporting portion (2) for supporting a ball valve (6) to be tested; The movable detection part (3) and the fixed detection part (4) are arranged on the detection platform (1) and are used to seal and abut against the inlet end and the outlet end of the ball valve (6) to be detected; A pressurizing part connected to the movable detection part (3) and used for filling the interior of the ball valve (6) to be tested with a detection medium; A pressure sensor, arranged in the movable detection part (3), used for detecting the pressure in the ball valve (6) to be tested; The auxiliary detection part (5) is arranged above the movable detection part (3) and is used to contact the handle (7) of the ball valve (6) to be tested.

2. The ball valve sealing detection device according to claim 1, characterized in that: The activity detection unit (3) and the fixed detection unit (4) both include: A detection body (31) is provided with a cylinder (32) inside, and one end of the cylinder (32) extending out of the detection body (31) is provided with a first through hole (33); A sealing gasket (34) is arranged at one end of the detection body (31) that contacts the ball valve (6) to be detected; The detection body (31) of the activity detection part (3) is also provided with a second through hole (35), and the second through hole (35) is used to communicate with the pressurizing part and the cylinder (32).

3. The ball valve sealing detection device according to claim 1, characterized in that: The auxiliary detection unit (5) comprises: A support body (8) having two support blocks (81) arranged at intervals thereon, wherein a space area for accommodating a handle (7) is formed between the two support blocks (81); A plurality of contact detection components (9) are arranged along the length direction of the support block (81), and the contact detection components (9) are used to contact the handle (7).

4. The ball valve sealing detection device according to claim 3, characterized in that: The contact detection component (9) comprises: A contact control member is arranged on the support block (81), and one end of the contact control member extending out of the support block (81) is provided with a contact head (91), and the contact head (91) is in contact with the handle (7); at least two detection members, one end of which protrudes from the support block (81) and is provided with a detection head (92), and the detection head (92) is arranged on a side of the contact head (91) close to the support block (81); When the handle (7) needs to be turned, the contact control member is used to fix the position where the contact head (91) contacts the handle (7); When it is necessary to detect whether the handle (7) has undergone rotational movement, the contact control member is used to make the contact head (91) elastically contact the handle (7).

5. The ball valve sealing detection device according to claim 4, characterized in that: The contact control element comprises: A control rod (93) movably arranged in the support block (81), one end of which extends out of the support block (81) and is connected to the contact head (91); A permanent magnet (94) is arranged at the end of the control rod (93) away from the contact head (91); The electromagnet (95) arranged corresponding to the permanent magnet (94) is arranged inside the support block (81).

6. The ball valve sealing detection device according to claim 4, characterized in that: The detection part comprises: A detection rod (96) is movably arranged in the support block (81), one end of which extends out of the support block (81) and is connected to the detection head (92), and the other end of which is provided with a conductive block (97); A resistor rod (98), one end of which is in sliding contact with the conductive block (97); the other end of the resistor rod (98) extending out of the support block (81) and the conductive block (97) are both electrically connected to the power connection portion; The second spring (99) is connected between the detection head (92) and the support block (81).

7. The ball valve sealing detection device according to claim 1, characterized in that: Also includes: The detection control terminal is used to control the operation of the movable detection part (3), the fixed detection part (4), the pressurizing part and the auxiliary detection part (5), to perform a sealing test on the ball valve (6) to be tested, and to obtain the detection data of the pressure sensor and the auxiliary detection part (5), so as to judge whether the sealing of the ball valve (6) to be tested is qualified through the detection data.

8. A method for detecting the sealing performance of a ball valve, using the ball valve sealing performance detection device according to any one of claims 1 to 7 to detect the ball valve (6) to be detected, characterized in that: include: The ball valve (6) to be tested is kept in an open state, a testing medium of a set pressure is charged into the ball valve (6) to be tested through a pressurizing unit, and a pressure sensor is used to detect a pressure change in the ball valve (6) to be tested within a set time to obtain first testing data; Keeping the ball valve (6) to be tested in a closed state, charging a detection medium of a set pressure into the ball valve (6) to be tested through a pressurizing unit, and detecting a pressure change in the ball valve (6) to be tested within a set time through a pressure sensor to obtain second detection data; It is determined whether the first test data and the second test data both meet the set standard. If so, the static sealing performance of the ball valve (6) to be tested is qualified, and the ball valve (6) to be tested is further subjected to dynamic sealing performance testing. If not, the sealing performance of the ball valve (6) to be tested is unqualified.

9. The ball valve sealing detection method according to claim 8, characterized in that: Also includes: When the static sealing performance of the ball valve (6) to be tested is qualified, the ball valve (6) to be tested is maintained at a plurality of set openings in sequence, and at each set opening, a detection medium with a set impact force is provided into the ball valve (6) to be tested through the pressurizing unit, and the auxiliary detection unit (5) is used to detect whether the handle (7) undergoes rotational movement. If so, the sealing performance of the ball valve (6) to be tested is unqualified and further detection is stopped. If not, the ball valve (6) to be tested is continuously tested until the handle (7) does not undergo rotational movement at all set openings, and the sealing performance of the ball valve (6) to be tested is qualified.

10. The ball valve sealing detection method according to claim 9, characterized in that: Utilizing the auxiliary detection unit (5) to detect whether the handle (7) undergoes rotational motion comprises: Obtaining a plurality of detection values ​​respectively corresponding to each contact detection component (9) on a support block (81); Obtaining evaluation parameters of the rotational movement of the handle (7) based on a plurality of detection values ​​on a support block (81); It is determined whether the evaluation parameter is within a set threshold value. If so, the handle (7) does not undergo a rotational movement. If not, the handle (7) undergoes a rotational movement.

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