A transmitter vacuum oil filling system and vacuum sealing device

Abstract

The invention discloses a transmitter vacuum oil filling system and a vacuum sealing device. Aiming at the problem that the filling liquid in the existing transmitter oil filling device contacts with the atmosphere during the sealing process and dissolves into the filling liquid, thereby causing the transmitter index to be affected, the system adopts a sealing body and a flange clamp of the transmitter to fix the seal, and the left port of the sealing body is matched and connected with the end countersunk hole of the flange clamp; after the filling of the filling liquid tank of the transmitter is completed, the rotating adjustment rod drives the fastener to move along the internal thread to the left port, and at the same time drives the sealing member to leave the adsorption range and move to the end countersunk hole of the flange clamp, until the sealing member contacts the sealing inclined surface of the flange clamp and forms a hard seal with the flange clamp under the extrusion of the fastener, thereby ensuring that the oil filling and sealing processes are completed in a vacuum environment.

Description

Technical Field

[0001] The invention belongs to the technical field of pressure transmitters, and in particular relates to a transmitter vacuum oil filling system and a vacuum sealing device. Background Art

[0002] Flange pressure transmitters are widely used field instruments in industrial sites. By filling silicone oil in the capillary tube, the medium pressure at the base end is transmitted to the sensor end through the silicone oil, realizing remote pressure collection. After the transmitter is filled with silicone oil, the oil filling position needs to be sealed to ensure that the transmitter product can be used in vacuum conditions and reduce the temperature influence of the product.

[0003] At present, the commonly used sealing methods for the oil filling position include steel ball screw hard seal, oil filling pipe welding seal, pin hard seal, etc. Among them, the oil filling pipe welding seal can achieve the vacuum during the two processes of oil filling and sealing, but it is necessary to weld an extra oil filling pipe, and welding is also required when sealing, which makes the production process complicated and requires high operation requirements. Pin hard seal is similar to steel ball screw hard seal. It can ensure vacuum when filling oil, but it is necessary to remove the oil filling device or the oil filling pipe for sealing when sealing. During the sealing process, the filling liquid will come into contact with the atmosphere, and there is a risk of air dissolving into the filling liquid, which makes the product unable to be used in high vacuum conditions. If air is dissolved in the filling liquid, the temperature influence of the transmitter will exceed the standard due to the thermal expansion and contraction of the air during the field use, affecting the user's use. Summary of the invention

[0004] The purpose of the present invention is to provide a transmitter vacuum oil filling system and a vacuum sealing device, which can complete vacuum oil filling and vacuum sealing by clamping once, and avoid contact between the filling liquid and the atmosphere.

[0005] To solve the above problems, the technical solution of the present invention is: A transmitter vacuum oil-filled sealing device, comprising: a sealing body, an adjusting rod, an adjusting rod sealing ring, a fastener, and a sealing member; The sealing body is provided with a transverse through hole, the left end of the transverse through hole is provided with an internal thread, the fastener is threadedly connected to the left end of the transverse through hole and is placed in the transverse through hole; A notch is formed at the right end of the transverse through hole, the adjusting rod sealing ring is arranged in the notch, the adjusting rod passes through the adjusting rod sealing ring, and the end of the adjusting rod is inserted into the end of the fastener; The sealing member is adsorbed on the left end of the transverse through hole and contacts with the fastener; The upper end surface of the sealing body is provided with a connecting hole for connecting the oil-filling joint; In the working state, the sealing body is fixedly connected and sealed with the flange clamp of the transmitter, and the left port of the sealing body is matched and connected with the end countersunk hole of the flange clamp; after the filling tank of the transmitter is filled, the adjusting rod is rotated to drive the fastener to move along the internal thread to the left port, and at the same time drive the sealing piece out of the adsorption range and move into the end countersunk hole of the flange clamp until the sealing piece contacts the sealing inclined surface of the flange clamp and forms a hard seal with the flange clamp under the extrusion of the fastener.

[0006] According to one embodiment of the present invention, a smooth countersunk hole is provided from the internal thread to the left port of the sealing body, and the diameter of the smooth countersunk hole is larger than the outer diameter of the fastener, thereby ensuring that the fastener can move in the space between the flange clamp and the sealing body after being detached from the internal thread, so that the fastener can be screwed into the thread of the flange clamp during the advancement of the adjusting rod.

[0007] According to one embodiment of the present invention, a cylindrical boss is provided at the left port of the sealing body, and the outer diameter and height of the cylindrical boss match the end countersunk hole of the flange clamp, thereby ensuring that the sealing member enters the flange clamp after leaving the adsorption range, and preventing it from getting stuck in the fastener and causing the fastener to be unable to be screwed into the flange clamp.

[0008] According to one embodiment of the present invention, a cavity is provided at the left port of the transverse through hole, a magnetic part is placed in the cavity, the sealing part is adsorbed on the magnetic part and is in contact with the fastener, ensuring that during the vacuum stage, the sealing part is always in contact with the fastener under the action of the magnetic part.

[0009] According to one embodiment of the present invention, the bottom of the connecting hole on the upper end surface of the sealing body is connected to the transverse through hole, and the connecting portion is located at the upper right of the fastener and is connected to the end of the fastener, ensuring that during the vacuum stage, the area within the sealing ring of the adjusting rod is in a vacuum environment.

[0010] According to one embodiment of the present invention, the end of the fastener is an internal hexagonal structure, and one end of the adjusting rod is an external hexagonal structure. The external hexagonal end of the adjusting rod matches the internal hexagonal end of the fastener, so that rotating the adjusting rod can drive the fastener.

[0011] According to one embodiment of the present invention, the end of the fastener is an inner cross structure, and one end of the adjusting rod is an outer cross structure. The outer cross end of the adjusting rod matches the inner cross end of the fastener, so that rotating the adjusting rod can drive the fastener.

[0012] According to one embodiment of the present invention, the middle portion of the adjusting rod is a cylinder, and the size of the cylinder is configured so that from the vacuuming stage to the sealing stage, the cylinder is always in close contact with the sealing ring of the adjusting rod to ensure that the cavity in the sealing body is in a vacuum environment.

[0013] According to an embodiment of the present invention, an end countersunk hole is provided at one end of the flange clamp, and the end countersunk hole is matched and connected with the sealing body; the end countersunk hole is provided with a thread inwardly, and the thread matches the fastener; The other end of the flange clamp is connected to the flange base through a capillary tube, and the end countersunk hole is communicated with the other end of the flange clamp as an oil filling channel.

[0014] A transmitter oil filling device comprises a transmitter vacuum oil filling sealing device according to an embodiment of the present invention.

[0015] Due to the adoption of the above technical solution, the present invention has the following advantages and positive effects compared with the prior art: The transmitter vacuum oil filling sealing device in one embodiment of the present invention aims to solve the problem that the filling liquid in the existing transmitter oil filling device is dissolved into the filling liquid during the sealing process due to contact with the atmosphere, thereby causing the transmitter index to change. A transverse through hole is opened through the sealing body, and an internal thread is set at the left end of the transverse through hole. The fastener is threadedly connected to the left end of the transverse through hole and is placed in the transverse through hole; a notch is opened at the right end of the transverse through hole, and an adjusting rod sealing ring is set in the notch. The adjusting rod passes through the adjusting rod sealing ring, and the end of the adjusting rod is inserted into the end of the fastener; the sealing member is adsorbed on the left end of the transverse through hole and is connected with the fastener. contact; a connecting hole is provided on the upper end face of the sealing body for connecting the oil filling joint; in the working state, the sealing body is fixedly connected and sealed with the flange clamp of the transmitter, and the left port of the sealing body is matched and connected with the end countersunk hole of the flange clamp; after the filling tank of the transmitter is filled, the adjusting rod is rotated to drive the fastener to move along the internal thread to the left port, and at the same time drive the sealing piece out of the adsorption range and move to the end countersunk hole of the flange clamp until the sealing piece contacts the sealing inclined surface of the flange clamp and forms a hard seal with the flange clamp under the extrusion of the fastener, ensuring that the oil filling and sealing processes are completed in a vacuum environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of a transmitter vacuum oil filling sealing device in one embodiment of the present invention; Figure 2 It is a schematic diagram of the connection between the transmitter vacuum oil filling sealing device and the flange clamp block in one embodiment of the present invention; Figure 3 This is a schematic diagram of a flange clamp hard seal in one embodiment of the present invention; Figure 4 Schematic diagram of an oil filling channel in one embodiment of the present invention; Figure 5 Schematic diagram of a flange transmitter in one embodiment of the present invention; Figure 6 It is a schematic diagram of a transmitter oil filling device in one embodiment of the present invention; Figure 7 Schematic diagram of the sealing stage in one embodiment of the present invention; Figure 8 It is a schematic diagram of an existing steel ball sealing device.

[0017] Description of reference numerals: 1: vacuum sealing device; 101: sealing body; 102: clamping block sealing ring; 103: magnetic part; 104: sealing part; 105: fastener; 106: oil filling joint sealing ring; 107: oil filling joint; 108: oil filling pipe; 109: adjusting rod sealing ring; 110: locking nut; 111: adjusting rod; 112: assembly bolt; 113: transverse through hole; 114: connecting hole; 115: cylindrical boss; 116: small hole; 2: flange transmitter; 201: flange base; 202: first capillary joint; 203: capillary; 204: second capillary joint; 205: flange clamping block; 206: transmitter sensor; 207: end countersunk hole; 208: sealing slope; 3: vacuum pump; 4: oil tank; 5: oil filling valve; 6: vacuum treatment valve; 7: oil treatment valve. DETAILED DESCRIPTION

[0018] The advantages and features of the present invention will become more apparent from the following description and claims.

[0019] This embodiment provides a transmitter vacuum oil filling sealing device, please refer to Figure 1 The device comprises a sealing body 101, an adjusting rod 111, an adjusting rod sealing ring 109, a fastener 105, and a sealing member 104; the sealing body 101 is provided with a transverse through hole 113, the left end of the transverse through hole 113 is provided with an internal thread, the fastener 105 is threadedly connected with the left end of the transverse through hole 113, and is placed in the transverse through hole 113; a notch is provided at the right end of the transverse through hole 113, the adjusting rod sealing ring 109 is arranged in the notch, the adjusting rod 111 passes through the adjusting rod sealing ring 109, and the end of the adjusting rod 111 is inserted into the end of the fastener 105; the other end of the adjusting rod is fixed by a locking nut 110. The sealing member 104 is adsorbed on the left end of the transverse through hole 113 and contacts with the fastener 105; the upper end surface of the sealing body 101 is provided with a connecting hole 114 for connecting the oil-filling joint 107.

[0020] Please see Figure 2In the working state, the sealing body 101 is fixedly connected and sealed with the flange clamp 205 of the transmitter, and the left port of the sealing body 101 is matched with the end countersunk hole 206 of the flange clamp 205; after the filling tank of the transmitter is filled, the rotating adjustment rod 111 drives the fastener 105 to move along the internal thread to the left port, and at the same time drives the sealing member 104 out of the adsorption range and moves to the end countersunk hole 207 of the flange clamp 205, until the sealing member 104 contacts the sealing inclined surface 208 of the flange clamp 205 and forms a hard seal with the flange clamp 205 under the extrusion of the fastener 105, please refer to Figure 3 .

[0021] Specifically, a smooth countersunk hole is provided from the internal thread of the left port of the sealing body 101 to the left port, and the diameter of the smooth countersunk hole is larger than the outer diameter of the fastener 105, ensuring that the fastener 105 can move in the space between the flange clamp 205 and the sealing body 101 after being disengaged from the internal thread, so that the fastener 105 can be screwed into the thread of the flange clamp 205 during the advancement of the adjusting rod 111.

[0022] The left end of the sealing body 101 is provided with a cylindrical boss 115, and the outer diameter and height of the cylindrical boss 115 match the end countersunk hole 207 of the flange clamp 205, so as to ensure that the sealing member 104 enters the flange clamp 205 after leaving the adsorption range, and prevents it from getting stuck on the fastener, so that the fastener cannot be screwed into the end countersunk hole of the flange clamp. In addition, the outer shell of the cylindrical boss 115 is provided with a clamp seal ring 102, so that the sealing body 101 and the flange clamp 205 are sealed and connected. In addition, when the sealing body 101 and the flange clamp 205 are connected, they can also be fixed by assembling bolts 112.

[0023] The left end of the transverse through hole 113 is provided with a cavity, in which the magnetic member 103 is placed, and the sealing member 104 is adsorbed on the magnetic member 103 and in contact with the fastener 105, so as to ensure that the sealing member 104 and the fastener 105 are always in contact with each other under the action of the magnetic member 103 during the vacuuming stage. The magnetic member 103 is made of magnetic material and can adsorb objects made of metals such as steel and iron. The sealing member 104 is made of metal and is preferably spherical in shape.

[0024] The bottom of the connecting hole 114 on the upper end surface of the sealing body 101 is connected to the transverse through hole 113. Figure 2 As shown, a small hole 116 is provided at the bottom of the connecting hole 114. The communicating part of the small hole 116 and the transverse through hole 113 is located at the upper right of the fastener 105 and communicates with the end of the fastener 105, ensuring that the area within the regulating rod sealing ring 109 is in a vacuum environment during the vacuuming stage, and ensuring that the filling liquid is also in a vacuum environment during the subsequent sealing stage. In addition, during the filling liquid filling stage, silicone oil can freely enter the cavity at the end of the fastener, ensuring that the pressure at both ends of the fastener is equal during the sealing stage, and the regulating rod can smoothly twist the fastener.

[0025] A passage is formed from the bottom of the connecting hole 114 to the end surface of the sealing body 101 . The passage is located above the internal thread of the left port of the sealing body and serves as a part of the oil filling passage.

[0026] During operation, the connection hole 114 is threadedly connected to the oil filling joint 107 and sealed by the oil filling joint sealing ring 106. The oil filling pipe 108 is installed on the oil filling joint 107, and the oil filling pipe 108 connects the vacuum device and the oil filling device.

[0027] In this embodiment, the fastener 105 can be a hexagon socket screw, whose end is an inner hexagon structure. Correspondingly, one end of the adjustment rod 111 is an outer hexagon structure, and the outer hexagon end of the adjustment rod 111 matches the inner hexagon end of the fastener 105, so that the fastener can be driven when the adjustment rod is rotated.

[0028] The fastener 105 may also be a cross screw, the end of which is an inner cross structure. Accordingly, one end of the adjusting rod 111 is an outer cross structure, and the outer cross end of the adjusting rod 111 matches the inner cross end of the fastener 105, so that the fastener can be driven when the adjusting rod is rotated.

[0029] In addition to the above two forms, the fastener can also be a slotted screw or other forms of fasteners, and the adjusting rod needs to be used in conjunction with the fastener.

[0030] The middle part of the adjusting rod 111 is a cylinder, and the size of the cylinder is configured so that from the vacuuming stage to the sealing stage, the cylinder is always in close contact with the adjusting rod sealing ring 109 to ensure that the cavity in the sealing body is in a vacuum environment.

[0031] One end of the flange clamp 205 is provided with an end countersunk hole 207, which is matched with the sealing body 101; the end countersunk hole 207 is provided with threads inwardly, which are matched with the fastener 105. The other end of the flange clamp 205 is connected to the flange base through a capillary tube, and the end countersunk hole 207 is connected with the other end of the flange clamp as part of the oil filling channel. Figure 4 The black area is the oil-filled channel and also the vacuum processing gas flow channel.

[0032] The transmitter in this embodiment can be a flange transmitter, please refer to Figure 5The flange transmitter includes a flange base 201, a first capillary joint 202, a capillary 203, a second capillary joint 204, a flange clamp 205 and a transmitter sensor 206. The transmitter sensor 206 is arranged in the flange clamp 205, one end of the flange clamp 205 is connected to the second capillary joint 204, the flange base 201 is connected to the first capillary joint 202, and the capillary 203 is connected between the first capillary joint 202 and the second capillary joint 204. Silicone oil is filled in the capillary 203 to realize the medium pressure at the flange base end to be transmitted to the sensor end through the silicone oil, so as to realize the remote collection of pressure. After the transmitter is filled with silicone oil, the oil filling position needs to be sealed to ensure that the transmitter product can be applied to vacuum conditions and reduce the temperature influence of the product.

[0033] Based on the above transmitter vacuum oil filling sealing device, this embodiment also provides a transmitter vacuum oil filling system, please refer to Figure 6 The device includes a flange transmitter 2, a vacuum sealing device 1, a vacuum pump 3, a vacuum treatment valve 6, an oil treatment valve 7, an oil filling valve 5, and an oil tank 4. The flange clamp of the flange transmitter 2 is connected with the transmitter vacuum oil filling sealing device 1, the oil filling joint of the vacuum sealing device 1 is installed with an oil filling pipe, the oil filling pipe is connected to the oil tank 4, and the oil filling valve 5 is arranged on the oil filling pipe. The vacuum pump 3 is connected to the oil tank 4 through a pipeline, one way of which is provided with an oil treatment valve 7 on this pipeline; the other way of which is connected to the oil filling pipe, and a vacuum treatment valve 6 is arranged on this pipeline.

[0034] The following describes the process of the transmitter vacuum oil filling sealing device to achieve vacuum oil filling sealing: Installation preparation: Install the adjusting rod seal, insert the adjusting rod, and tighten the lock nut. Screw the fastener into the sealing body and put in the steel ball. The steel ball will automatically adsorb on the fastener and the sealing body due to the magnetic force of the magnet.

[0035] Tooling assembly: Install the clamping block sealing ring, and tighten the assembled vacuum sealing device and flange clamping block with the assembly screws. Install the oil filling joint sealing ring and oil filling pipe on the oil filling joint, and install it as a whole on the sealing tooling.

[0036] Vacuuming: The oil filling pipe is connected to a vacuum pump. Turn on the vacuum pump, vacuum treatment valve and oil treatment valve to achieve vacuum treatment of the filling liquid in the oil tank and the inner cavity of the flange transmitter, which should be kept below 1Pa for more than 2 hours.

[0037] Filling with filling liquid: Close the vacuum valve, vacuum treatment valve, and oil treatment valve, open the oil filling valve, and the filling liquid in the oil tank will automatically fill the inner cavity and pipeline of the flange transmitter under the action of gravity.

[0038] Steel ball sealing: Rotate the adjustment rod, and the fastener moves forward along the thread under the action of the adjustment rod, and at the same time drives the steel ball out of the magnet adsorption range, and moves forward synchronously under the action of the fastener until the steel ball contacts the inclined surface of the flange clamp and forms a hard seal under the extrusion of the fastener. Please refer to Figure 7 .

[0039] Remove the tooling to complete the oil filling: close the oil filling valve, move the adjusting rod axially to disengage it from the fastener, remove the oil filling joint, loosen the assembly bolts, and remove the vacuum sealing device.

[0040] For the conventional sealing method of the transmitter with steel ball seal, please refer to Figure 8 The oil-filling joint 107 is directly assembled on the flange clamp 205. After the vacuuming and filling of the filling liquid are completed, the oil-filling joint 107 is removed, the steel ball 104 is inserted, and the set screw 105 is tightened to complete the sealing. During the process, after the oil-filling joint is removed and before the steel ball is tightened, the filling liquid contacts the atmosphere, and there is a risk of air dissolving into the filling liquid. The transmitter vacuum oil-filling and sealing device provided in this embodiment completes the two actions of oil filling and sealing in one clamping, and the filling liquid is in a vacuum environment during oil filling and sealing, and does not contact the atmosphere, so it has good operability.

[0041] In addition, the cylindrical boss and countersunk hole design of the vacuum sealing device ensure that the steel ball can automatically enter the inner thread end of the flange clamp during the tightening process of the fastener, and due to the countersunk hole design, the fastener can move freely in this space, solving the problem of mismatch between the inner thread of the vacuum sealing device and the inner thread of the flange clamp.

[0042] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, if these changes fall within the scope of the claims of the present invention and their equivalents, they still fall within the protection scope of the present invention.

Claims

1. A transmitter vacuum oil filling sealing device, characterized in that: include: Sealing body, adjusting rod, adjusting rod sealing ring, fastener, sealing part; The sealing body is provided with a transverse through hole, the left end of the transverse through hole is provided with an internal thread, the fastener is threadedly connected to the left end of the transverse through hole and is placed in the transverse through hole; A notch is formed at the right end of the transverse through hole, the adjusting rod sealing ring is arranged in the notch, the adjusting rod passes through the adjusting rod sealing ring, and the end of the adjusting rod is inserted into the end of the fastener; The sealing member is adsorbed on the left end of the transverse through hole and contacts with the fastener; The upper end surface of the sealing body is provided with a connecting hole for connecting the oil-filling joint; In the working state, the sealing body is fixedly connected and sealed with the flange clamp of the transmitter, and the left port of the sealing body is matched and connected with the end countersunk hole of the flange clamp; after the filling tank of the transmitter is filled, the adjusting rod is rotated to drive the fastener to move along the internal thread to the left port, and at the same time drive the sealing piece out of the adsorption range and move into the end countersunk hole of the flange clamp until the sealing piece contacts the sealing inclined surface of the flange clamp and forms a hard seal with the flange clamp under the extrusion of the fastener.

2. The transmitter vacuum oil filling sealing device according to claim 1, characterized in that: A smooth countersunk hole is provided from the internal thread to the left port of the sealing body, and the diameter of the smooth countersunk hole is larger than the outer diameter of the fastener, ensuring that the fastener can move in the space between the flange clamp and the sealing body after being disengaged from the internal thread, so that the fastener can be screwed into the thread of the flange clamp during the advancement of the adjusting rod.

3. The transmitter vacuum oil filling sealing device according to claim 1, characterized in that: A cylindrical boss is arranged at the left port of the sealing body, and the outer diameter and height of the cylindrical boss match the end countersunk hole of the flange clamp, so as to ensure that the sealing member enters the flange clamp after leaving the adsorption range, and prevents the sealing member from getting stuck in the fastener and causing the fastener to be unable to be screwed into the flange clamp.

4. The transmitter vacuum oil filling sealing device according to claim 1, characterized in that: A cavity is provided at the left end of the transverse through hole, and a magnetic member is placed in the cavity. The sealing member is adsorbed on the magnetic member and contacts the fastener, ensuring that the sealing member is always in contact with the fastener under the action of the magnetic member during the vacuuming stage.

5. The transmitter vacuum oil filling sealing device according to claim 1, characterized in that: The bottom of the connecting hole on the upper end surface of the sealing body is connected to the transverse through hole, and the connecting portion is located at the upper right of the fastener and is connected to the end of the fastener, ensuring that the area within the regulating rod sealing ring is in a vacuum environment during the vacuum stage.

6. The transmitter vacuum oil filling sealing device according to claim 1, characterized in that: The end of the fastener is an inner hexagonal structure, and one end of the adjustment rod is an outer hexagonal structure. The outer hexagonal end of the adjustment rod matches the inner hexagonal end of the fastener, so that the fastener can be driven by rotating the adjustment rod.

7. The transmitter vacuum oil filling sealing device according to claim 1, characterized in that: The end of the fastener is an inner cross structure, one end of the adjustment rod is an outer cross structure, and the outer cross end of the adjustment rod matches the inner cross end of the fastener, so that the fastener can be driven by rotating the adjustment rod.

8. The transmitter vacuum oil filling sealing device according to claim 6 or 7, characterized in that: The middle part of the adjusting rod is a cylinder, and the size of the cylinder is configured so that from the vacuuming stage to the sealing stage, the cylinder is always in close contact with the sealing ring of the adjusting rod to ensure that the cavity in the sealing body is in a vacuum environment.

9. The transmitter vacuum oil filling sealing device according to claim 1, characterized in that: An end countersunk hole is formed at one end of the flange clamp, and the end countersunk hole is matched and connected with the sealing body; a thread is provided inwardly of the end countersunk hole, and the thread matches the fastener; The other end of the flange clamp is connected to the flange base through a capillary tube, and the end countersunk hole is communicated with the other end of the flange clamp as an oil filling channel.

10. A transmitter vacuum oil filling system, characterized in that: It comprises a transmitter vacuum oil-filled sealing device as described in any one of claims 1 to 9.

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