Neutral point discharge gap adjusting device capable of displaying numerical value

Abstract

The utility model relates to a neutral point discharge gap adjusting device capable of displaying numerical values, which belongs to the technical field of neutral point equipment of a high-voltage power transformer and comprises a placing seat, an adjusting screw rod, a discharge ball and a sliding block displacement sensor. A display screen used for displaying the sliding length of the adjusting screw rod is arranged on the placing base, the display screen is electrically connected with the sliding block displacement sensor, the sliding block displacement sensor comprises an adjusting sliding block connected with the adjusting screw rod, and a threaded base in threaded fit with the adjusting screw rod is arranged on the placing base. When the adjusting screw rod rotates, the discharging ball and the adjusting sliding block can be driven to slide relative to the placing seat under the action of thread transmission, the moving distance of the discharging ball can be directly read on the display screen, and accurate numerical values of two decimal points can be directly read on the display screen through one-time mechanical transmission. And the accuracy of the obtained discharge gap value is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to high -voltage power transformer neutral point equipment's technical field especially, it is a kind of neutral point discharge gap adjusting device of display value. BACKGROUND

[0002] Neutral point discharge gap refers to the neutral point insulation distance between adjacent windings or between winding and ground in power equipment (such as transformer, generator etc.). In power equipment, it determines whether the current of neutral point grounding device can be effectively shunted when overvoltage, and also affects the stability of neutral point voltage. The smaller the gap, the greater the overvoltage current that can be shunted, and the more stable the neutral point voltage, but at the same time, a larger discharge resistor is needed to withstand greater current. The larger the gap, the smaller the discharge resistor needed, but the stability of the neutral point voltage will be reduced.

[0003] The discharge gap of neutral point is generally measured by device, but the adjusting device in prior art includes coarse adjustment screw rod, fine adjustment screw rod and scale, in actual use process, coarse adjustment screw rod is adjusted first, then fine adjustment screw rod is adjusted, and then the value of discharge gap corresponding to the value can be read from scale, and the value error read from scale after two mechanical transmissions is large. SUMMARY

[0004] In order to reduce the error of read discharge gap value, the application provides a neutral point discharge gap adjusting device of display value.

[0005] The application provides a neutral point discharge gap adjusting device of display value, which adopts the following technical scheme:

[0006] A neutral point discharge gap adjusting device of display value, comprising a placement seat, an adjusting screw rod, a discharge ball and a slider displacement sensor, one end of the adjusting screw rod is connected with the discharge ball through the placement seat, the placement seat is provided with a display screen for displaying the sliding length of the adjusting screw rod, the display screen is electrically connected with the slider displacement sensor, and the slider displacement sensor comprises an adjusting slider connected with the adjusting screw rod.

[0007] The placement seat is also provided with a threaded seat, the threaded seat is provided with an adjusting through hole matched with the thread of the adjusting screw rod, and the adjusting screw rod can drive the discharge ball and the adjusting slider to slide relative to the placement seat under the action of threaded transmission when rotating.

[0008] By adopting the technical scheme, the adjusting screw can drive the discharge sphere and the adjusting sliding block to slide relative to the placing seat under the action of the thread transmission, and since the display screen and the sliding block displacement sensor are electrically connected, the adjusting sliding block can transmit the information about the sliding length to the display screen and display the information on the display screen, so that the operator can directly read the value of the discharge gap from the display screen, and compared with reading the value from the scale, the accuracy of the value of the discharge gap is improved.

[0009] Preferably, the adjusting sliding block is provided with a linkage block, the adjusting sliding block is connected with the adjusting screw through the linkage block, a linkage through hole is formed through the linkage block, a matching through hole is coaxially formed in the outer wall of the adjusting screw, and the inner wall of the connection through hole is attached to the inner wall of the matching through hole.

[0010] By adopting the technical scheme, the adjusting sliding block is connected with the adjusting screw through the linkage block, so that the adjusting sliding block can slide along with the sliding of the adjusting screw, and the linkage block is clamped on the adjusting screw through the connection through hole and the matching through hole, so that the stability of the sliding of the adjusting sliding block along with the adjusting screw is improved.

[0011] Preferably, the placing seat is provided with a support pipe for supporting the threaded seat, the linkage block is located between the threaded seat and the placing seat, and a sliding through hole for the sliding of the linkage block is formed in the side wall of the support pipe.

[0012] By adopting the technical scheme, the linkage block cooperates with the sliding through hole, the adjusting screw is not easy to shake the adjusting sliding block when rotating, the stability of the sliding of the adjusting sliding block is improved to a certain extent, and in addition, the sliding length of the adjusting screw can be limited.

[0013] Preferably, the connection between the support pipe and the threaded seat is arranged in a stepped manner.

[0014] By adopting the technical scheme, on the one hand, dust and impurities from the outside are not easy to enter the support pipe, so as not to affect the thread cooperation between the adjusting screw and the threaded seat, and the stability of the rotation of the adjusting screw is ensured, and on the other hand, the threaded seat can be assembled on the support pipe, and the threaded seat can be positioned.

[0015] Preferably, the discharge sphere comprises a spherical body part and a rod body part, the rod body part is provided with a connecting seat, the connecting seat is provided with a limiting bolt, the connecting seat is connected with the adjusting screw through the limiting bolt, the placing seat is provided with a control sleeve, the rod body part is in sliding cooperation with the control sleeve, the spherical body part is located outside the control sleeve, and the control sleeve is provided with a control sealing ring attached to the outer wall of the rod body part.

[0016] By adopting the technical scheme, the dust and impurities from the outside are not easy to enter the control sleeve and affect the sliding of the discharge ball, thereby prolonging the service life of the device to a certain extent.

[0017] Preferably, the placing seat is provided with a dust cover, and the adjusting screw, the slider displacement sensor and the display screen are located in the dust cover.

[0018] By adopting the technical scheme, the dust cover not only blocks the impurities and dust from the outside, but also prevents the display screen from being separated from the support in a long-term use process, thereby effectively prolonging the service life of the device.

[0019] To sum up, the present application has at least one of the following beneficial technical effects:

[0020] 1. When the adjusting screw slides, the discharge ball and the adjusting slider are driven to slide relative to the placing seat under the action of the threaded transmission. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a schematic diagram of the overall structure of the embodiment of the present application.

[0022] Figure 2 is an enlarged view of part A in Figure 1

[0023] BRIEF DESCRIPTION OF DRAWINGS1. placing seat; 11, placing through hole; 111, abutting sealing ring; 12, control sleeve; 121, control through hole; 122, control sealing ring; 13, dust cover; 2, adjusting screw; 21, limiting through hole; 22, fitting through hole; 3, discharge ball; 31, spherical body; 32, rod body; 4, slider displacement sensor; 41, adjusting slider; 42, adjusting slide rail; 5, connecting seat; 51, limiting bolt; 52, fitting counterbore; 53, connecting through hole; 6, threaded seat; 61, adjusting through hole; 7, support pipe; 8, display screen; 81, support; 9, linkage block; 91, linkage through hole. DETAILED DESCRIPTION

[0024] The following will be described in detail with reference to the accompanying drawings. Figure 1 The utility model will be described in further detail.

[0025] The embodiment of the present application discloses a neutral point discharge gap adjusting device for displaying a value, which refers to Figure 1, including the placement seat 1, the adjusting screw 2, the discharge ball 3 and the slider displacement sensor 4, the placement seat 1 undertakes the role of carrier in the device and is used for supporting the remaining parts, one end of the adjusting screw 2 penetrates through the placement seat 1 and is fixed with the discharge ball 3, and the placement seat 1 is provided with a placement through hole 11 for the adjusting screw 2 to penetrate.

[0026] With reference to Figure 1 , the discharge ball 3 comprises a spherical body part 31 and a rod body part 32, the rod body part 32 is fixed with a connecting seat 5, the rod body part 32 and the connecting seat 5 are fixed through a bolt, the connecting seat 5 is provided with a limiting bolt 51, the connecting seat 5 is provided with an embedding counterbore 52 for the end of the adjusting screw 2 to embed, the side wall of the connecting seat 5 is provided with a connecting through hole 53 for the limiting bolt 51 to penetrate, the connecting through hole 53 is communicated with the embedding counterbore 52, the side wall of the adjusting screw 2 is provided with a limiting through hole 21 which is screwed with the limiting bolt 51, when the adjusting screw 2 is embedded in the embedding counterbore 52, the adjusting screw 2 can be rotated to the position that the limiting through hole 21 is communicated with the connecting through hole 53, the limiting bolt 51 can be screwed into the limiting through hole 21 after penetrating through one side of the connecting through hole 53, and then embedded in the limiting through hole 21 on the other side, so that the discharge ball 3 and the adjusting screw 2 are fixed.

[0027] With reference to Figure 1 , the side of the placement seat 1 facing the discharge ball 3 is fixed with a control sleeve 12, the control sleeve 12 can be fixed with the placement seat 1 through a bolt, the rod body part 32 is in sliding fit with the control sleeve 12, the spherical body part 31 is located outside the control sleeve 12, the control sleeve 12 comprises a control through hole 121 for the rod body part 32 to slide and a give-way through hole for the connecting seat 5 to slide, and the length of the give-way through hole can be limited to limit the sliding length of the discharge ball 3.

[0028] With reference to Figure 1 and Figure 2 , the placement seat 1 is provided with an abutting sealing ring 111, the inner wall of the abutting sealing ring 111 is in abutment with the outer wall of the adjusting screw 2, and the inner wall of the placement through hole 11 is provided with an abutting sealing groove for the abutting sealing ring 111 to embed; the control sleeve 12 is provided with a control sealing ring 122 in abutment with the outer wall of the rod body part 32, and the inner wall of the control through hole 121 is provided with a control sealing groove for the control sealing ring 122 to embed, so that the dust and impurities outside cannot easily enter the control sleeve 12 to affect the sliding of the discharge ball 3, and the service life of the device is prolonged to a certain extent.

[0029] With reference to Figure 1The threaded seat 6 is arranged on the support pipe 7 between the threaded seat 6 and the placing seat 1, the threaded seat 6 is fixed on the placing seat 1 through the support pipe 7, the threaded seat 6 is arranged on the support pipe 7, and the adjusting through hole 61 is arranged on the threaded seat 6 and threadedly matched with the adjusting screw 2, so that the discharge ball 3 can be driven to slide relative to the placing seat 1 under the action of the threaded transmission when the adjusting screw 2 rotates. Since the thread has a self-locking function, the reliability of controlling the discharge ball 3 to slide through the adjusting screw 2 is improved.

[0030] With reference to Figure 1 The connection between the support pipe 7 and the threaded seat 6 is arranged in a stepped manner, which can prevent dust and impurities from entering the support pipe 7, prevent the threaded matching between the adjusting screw 2 and the threaded seat 6 from being affected, ensure the stability of the rotation of the adjusting screw 2, and facilitate the assembly of the threaded seat 6 on the support pipe 7.

[0031] With reference to Figure 1 The placing seat 1 is provided with a display screen 8 for displaying the sliding length of the adjusting screw 2, the display screen 8 is electrically connected with the slider displacement sensor 4, the placing seat 1 is fixedly provided with a support 81 for fixing the display screen 8, the support 81 can be fixed at the abutting position of the support pipe 7 and the placing seat 1, the support 81 can be integrally formed with the support pipe 7 or fixed with the support pipe 7 through welding, and in the embodiment, the support 81 is fixed with the support pipe 7 through welding.

[0032] With reference to Figure 1 The slider displacement sensor 4 generally comprises an adjusting slider 41, an adjusting slide rail 42, a signal processing circuit and a sensing element. The adjusting slide rail 42 is fixedly arranged on the outer wall of the support pipe 7 and arranged along the length direction of the support pipe 7. The adjusting slider 41 moves linearly along the adjusting slide rail 42. The sensing element can be an optical sensor, a capacitive sensor or a magneto-electric sensor. In the embodiment, the sensing element is a capacitive sensor. When the adjusting slider 41 moves on the slide rail, the sensing element can sense the change of the slider position and convert the information into an electric signal to be transmitted to the signal processing circuit. After amplification, filtering and processing by the signal processing circuit, the electric signal is transmitted to the display screen 8, so that the displacement of the discharge ball 3 can be displayed on the display screen 8. Generally, the neutral point discharge gap is a millimeter-level device. Through one-time mechanical transmission, the accurate value of two decimal places can be directly read from the display screen 8, and the accuracy of the obtained discharge gap value is effectively improved.

[0033] With reference to Figure 1The adjusting sliding block 41 is fixed with a linkage block 9, the linkage block 9 is arranged in a staggered manner with the adjusting sliding rail 42, the adjusting sliding block 41 is fixed with the adjusting screw 2 through the linkage block 9, the linkage block 9 is provided with a linkage through hole 91 penetratingly arranged thereon, the outer wall of the adjusting screw 2 is coaxially provided with an embedded through hole 22 matched with the linkage through hole 91, in the actual assembly process, the inner wall of the embedded through hole 22 is matched with the inner wall of the linkage through hole 91, then the adjusting sliding block 41 is clamped on the adjusting screw 2, the adjusting sliding block 41 can slide along with the sliding of the adjusting screw 2, the reliability of the adjusting sliding block 41 sliding along with the adjusting screw 2 is improved, so that the accuracy of the value displayed by the display screen 8 can be improved to a certain extent.

[0034] With reference to Figure 1 The linkage block 9 is located between the threaded seat 6 and the placing seat 1, the side wall of the supporting pipe 7 is provided with a sliding through hole for the sliding of the linkage block 9, the linkage block 9 is matched with the sliding through hole, the adjusting screw 2 is not easy to shake the adjusting sliding block 41 when rotating, the stability of the sliding of the adjusting sliding block 41 is improved to a certain extent, in addition, the sliding length of the adjusting screw 2 can be limited.

[0035] With reference to Figure 1 The placing seat 1 is provided with a dust cover 13, the adjusting screw 2, the sliding block displacement sensor 4 and the display screen 8 are located in the dust cover 13, the dust cover 13 is fixed with the placing seat 1 and the support 81 through bolts, the dust cover 13 not only blocks the impurities and dust in the outside world, but also makes the display screen 8 not easy to be separated from the support 81 in the long-term use process, effectively prolongs the service life of the device.

[0036] The above are the preferred embodiments of the present application, which do not limit the protection scope of the present application, therefore: all equivalent changes made on the structure, shape, principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A neutral point discharge gap adjustment device for displaying a numerical value, characterized by, The device comprises a placing seat (1), an adjusting screw rod (2), a discharge ball (3) and a slider displacement sensor (4), one end of the adjusting screw rod (2) is connected with the discharge ball (3) through the placing seat (1), a display screen (8) for displaying the sliding length of the adjusting screw rod (2) is arranged on the placing seat (1), the display screen (8) is electrically connected with the slider displacement sensor (4), the slider displacement sensor (4) comprises an adjusting slider (41) connected with the adjusting screw rod (2); A threaded seat (6) is further arranged on the placing seat (1), an adjusting through hole (61) threadedly matched with the adjusting screw rod (2) is formed in the threaded seat (6), when the adjusting screw rod (2) rotates, the discharge ball (3) and the adjusting slider (41) can slide relative to the placing seat (1) under the action of the screw transmission.

2. The neutral point discharge gap adjustment device for displaying a numerical value according to claim 1, characterized by, A linkage block (9) is arranged on the adjusting slider (41), the adjusting slider (41) is connected with the adjusting screw rod (2) through the linkage block (9), a linkage through hole (91) is formed through the linkage block (9), a fitting through hole (22) is coaxially formed in the outer wall of the adjusting screw rod (2), the inner wall of the linkage through hole (91) is matched with the inner wall of the fitting through hole (22).

3. The neutral point discharge gap adjustment apparatus for displaying a numerical value according to claim 2, characterized by, A support pipe (7) for supporting the threaded seat (6) is arranged on the placing seat (1), the linkage block (9) is located between the threaded seat (6) and the placing seat (1), a sliding through hole for the sliding of the linkage block (9) is formed in the side wall of the support pipe (7).

4. The neutral point discharge gap adjustment apparatus for displaying a numerical value according to claim 3, characterized by, The connection between the support pipe (7) and the threaded seat (6) is arranged in a stepped manner.

5. The neutral point discharge gap adjustment apparatus for displaying a numerical value according to claim 1, characterized by, The discharge ball (3) comprises a spherical body (31) and a rod body (32), a connecting seat (5) is arranged on the rod body (32), a limiting bolt (51) is arranged on the connecting seat (5), the connecting seat (5) is connected with the adjusting screw rod (2) through the limiting bolt (51), a control sleeve (12) is arranged on the placing seat (1), the rod body (32) is slidingly matched with the control sleeve (12), the spherical body (31) is located outside the control sleeve (12), a control sealing ring (122) matched with the outer wall of the rod body (32) is arranged on the control sleeve (12).

6. The neutral point discharge gap adjustment apparatus for displaying a numerical value according to claim 1, characterized by, A dust cover (13) is arranged on the placing seat (1), the adjusting screw rod (2), the slider displacement sensor (4) and the display screen (8) are located in the dust cover (13).

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