A small split type pressure transmitting sensor

Abstract

The utility model relates to transmitter technical field discloses a small split type pressure transmission sensor, including the shell, the inside of shell is provided with the mounting groove, through the double sealing structure of rubber pad and grouting, realize excellent waterproof, the effect of preventing impurity and pressure capacity, make rubber pad sleeve joint in the outer wall of connecting rod top end, and the bottom end of shell is closely combined, can preliminarily block outside water vapor, dust into the inside of mounting groove, simultaneously, the grouting filled in mounting groove can fill all the gaps between lock nut, sensor, rubber pad and mounting groove, form complete sealing layer, further isolate outside water, oil and other impurities, in addition, grouting has certain structural strength, can assist to bear external pressure, cooperate with the thread connection of shell and lock nut and fix, make equipment can long -term stable work under the complex environment such as outdoor damp, rainy or industrial oil dirt, avoid the damage of component due to water inlet, corrosion or pressure impact, significantly broaden equipment application scene.

Description

Technical Field

[0001] This utility model relates to the field of transmitter technology, specifically a small split-type pressure transmitter sensor. Background Technology

[0002] A transmitter is a core detection and signal conversion device in the field of industrial automation. Its main function is to convert non-electrical physical quantities such as temperature, pressure, flow rate, and liquid level into standard and stable electrical or digital signals after they are collected by sensors and processed, and then transmit them to the control system to realize real-time monitoring, control and regulation of industrial processes.

[0003] Currently, most pressure transmitters in existing technology adopt a single sealing structure, which has limited sealing effect and cannot effectively prevent external moisture, dust, oil and other impurities from entering the equipment. This makes the equipment prone to water ingress and corrosion in humid, rainy, or industrial oily environments, which in turn damages internal core components such as sensors and motherboards, shortening the service life of the equipment. At the same time, the pressure-bearing structure design of existing equipment is imperfect, lacking components such as potting compound that combine sealing and structural support functions. The overall pressure-bearing capacity is weak, and when there are external pressure fluctuations or impacts, components are prone to loosening and deformation, which cannot meet the long-term stable operation requirements under complex working conditions and limits the applicable scenarios. In addition, existing equipment lacks a structure to assist in the uniform transmission of pressure, and external pressure is prone to local concentration on the sensor detection surface, resulting in deviation of detection data. On the other hand, the equipment housing is not designed with a pressure balancing structure. When the ambient temperature changes, an internal pressure difference is prone to form, interfering with the sensor detection signal, especially significantly affecting the accuracy of small-range pressure detection. Although some equipment has a ventilated structure, it is not equipped with a waterproof and breathable membrane, which allows external moisture to enter and further affect the accuracy. Utility Model Content

[0004] The purpose of this invention is to solve the problems of insufficient protection performance, volume redundancy and unstable detection accuracy in the existing technology, and to propose a small split-type pressure transmitter sensor.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A small, split-type pressure transmitter sensor includes a housing with an internal mounting groove. A connecting rod is fixedly connected to the bottom of the housing. A tapered groove is formed at the top of the connecting rod, and a recess is formed inside the connecting rod.

[0007] Preferably, a damper is fixedly connected to the inner wall of the first groove, a rubber pad is sleeved on the outer wall of the top end of the connecting rod, a sensor is installed at the bottom of the inner cavity of the mounting groove, and a motherboard is fixedly connected to the top end of the sensor.

[0008] Preferably, a locking nut is threaded to the top of the inner cavity of the mounting groove, a second groove is provided inside the locking nut, a first tapered groove is provided at the top of the locking nut, a wire is fixedly connected to the middle of the locking nut, a vent hole is provided inside the locking nut, and the inside of the mounting groove is filled with potting compound.

[0009] Preferably, a locking nut is threaded to the top of the inner cavity of the mounting groove, a second groove is provided inside the locking nut, a first tapered groove is provided at the top of the locking nut, a wire is fixedly connected to the middle of the locking nut, a vent hole is provided inside the locking nut, and the inside of the mounting groove is filled with potting compound.

[0010] Preferably, the rubber pad is tightly bonded to the housing, and the potting compound is used to fill the gaps between the locking nut, the sensor, and the rubber pad and the mounting groove.

[0011] Preferably, the inside of the vent is lined with a waterproof and breathable membrane.

[0012] Compared with the prior art, this utility model provides a small, split-type pressure transmitter sensor, which has the following advantages:

[0013] 1. This small, split-type pressure transmitter sensor achieves excellent waterproofing, impurity prevention, and pressure resistance through a dual-sealing structure of rubber gasket and potting compound. The rubber gasket fits tightly onto the outer wall of the connecting rod top and the bottom of the housing, initially preventing external moisture and dust from entering the mounting groove. Simultaneously, the potting compound filling the mounting groove fills all gaps between the locking nut, sensor, rubber gasket, and mounting groove, forming a complete sealing layer that further isolates external water, oil, and other impurities. In addition, the potting compound provides structural strength to help withstand external pressure. Combined with the threaded connection between the housing and the locking nut, this allows the device to operate stably for extended periods in complex environments such as outdoor humidity, rain, or industrial oil contamination, preventing component damage due to water ingress, corrosion, or pressure shocks, significantly expanding the device's applicable scenarios.

[0014] 2. This small, split-type pressure transmitter sensor features a mounting groove inside the housing that precisely matches the sensor size. The main board and the second groove inside the locking nut are also matched, allowing for nested installation of all components and significantly reducing the overall size. Simultaneously, the first groove and the second conical groove inside the connecting rod not only save space but also help to evenly transmit pressure to the sensor's detection surface, preventing localized pressure concentration from affecting data accuracy. Furthermore, a waterproof and breathable membrane is attached to the vent holes inside the locking nut to balance the internal air pressure, preventing abnormal air pressure from interfering with the accuracy of small-range detections and preventing external moisture from entering. The main board connects to the sensor via wires, eliminating the need for a fixed matching housing structure. Different sensor or main board models can be replaced according to actual detection needs, enabling flexible configuration and adaptation to diverse pressure detection requirements. In addition, the damper on the inner wall of the first groove buffers instantaneous external pressure impacts, reducing signal fluctuations and further ensuring detection accuracy. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a small split-type pressure transmitter sensor proposed in this utility model;

[0016] Figure 2 This is a schematic diagram of the groove and the outer shell structure in a small split-type pressure transmitter sensor proposed in this utility model;

[0017] Figure 3 This is a schematic diagram of the potting and connecting rod structure in a small split-type pressure transmitter sensor proposed in this utility model;

[0018] Figure 4 This is a schematic diagram of the locking nut and rubber pad structure in a small split-type pressure transmitter sensor proposed in this utility model;

[0019] Figure 5 This is a schematic diagram of the groove and sensor structure in a small split-type pressure transmitter sensor proposed in this utility model.

[0020] Figure 6 This is a schematic diagram of the conical groove one and the groove two in a small split-type pressure transmitter sensor proposed in this utility model.

[0021] In the diagram: 101, outer casing; 102, mounting slot; 103, groove one; 104, damper; 105, rubber pad; 106, sensor; 107, main board; 108, locking nut; 109, wire; 110, vent hole; 111, potting compound; 112, conical groove one; 113, groove two; 114, conical groove two; 115, connecting rod. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] Example:

[0025] See attached document Figures 1 to 6 As shown, a small split-type pressure transmitter sensor includes a housing 101. The housing 101 has an internal mounting groove 102. A connecting rod 115 is fixedly connected to the bottom end of the housing 101. The top end of the connecting rod 115 has a tapered groove 114. The inside of the connecting rod 115 has a groove 103.

[0026] Furthermore, a damper 104 is fixedly connected to the inner wall of the groove 103, a rubber pad 105 is sleeved on the outer wall of the top of the connecting rod 115, the rubber pad 105 is tightly connected to the outer shell 101, a sensor 106 is installed at the bottom of the inner cavity of the mounting groove 102, and a main board 107 is fixedly connected to the top of the sensor 106.

[0027] Furthermore, a locking nut 108 is threadedly connected to the top of the inner cavity of the mounting groove 102. The locking nut 108 has a second groove 113 inside and a tapered groove 112 at its top. A wire 109 is fixedly connected to the middle of the locking nut 108. A vent hole 110 is provided inside the locking nut 108. The inside of the mounting groove 102 is filled with potting compound 111, which is used to fill the gaps between the locking nut 108, the sensor 106, the rubber pad 105, and the mounting groove 102.

[0028] Furthermore, a locking nut 108 is threadedly connected to the top of the inner cavity of the mounting groove 102. The locking nut 108 has a second groove 113 inside and a tapered groove 112 at its top. A wire 109 is fixedly connected to the middle of the locking nut 108. A vent hole 110 is opened inside the locking nut 108. A waterproof and breathable membrane is attached to the inside of the vent hole 110. The inside of the mounting groove 102 is filled with potting compound 111.

[0029] When using this utility model,

[0030] An installation slot 102 adapted to the size of the sensor 106 is provided inside the housing 101. After the sensor 106 is installed, it is tightly attached to the inner wall of the housing 101 by the rubber pad 105, which initially blocks external moisture and impurities from entering the internal core area. At the same time, it provides a stable installation reference for the sensor 106, ensuring that the position of the sensor 106 is fixed during pressure detection and avoiding the impact of displacement on detection accuracy.

[0031] The top of the mounting slot 102 is threadedly connected to the locking nut 108. The tightening force is controlled by a fixed torque wrench. On the one hand, the internal components such as the sensor 106 and the main board 107 are firmly fixed in the mounting slot 102 to prevent the components from loosening under complex working conditions such as vibration and impact. On the other hand, the locking nut 108 forms a tight contact surface with the outer shell 101 and the sensor 106, laying the structural foundation for subsequent potting and sealing.

[0032] The motherboard 107 integrates a signal processing circuit and is electrically connected to the sensor 106 via wire 109. The size of the motherboard 107 is compatible with the groove 113 inside the locking nut 108. Different models of sensors 106 or motherboard 107 can be replaced according to actual detection needs without adjusting the overall housing 101 structure, achieving flexible matching and adapting to diverse pressure detection scenarios.

[0033] External pressure is transmitted to sensor 106 through connecting rod 115. The groove 103 and conical groove 114 inside connecting rod 115 help to evenly transmit pressure to the detection surface of sensor 106, avoiding local pressure concentration that could affect data accuracy. The raw electrical signal output by sensor 106 is transmitted to motherboard 107. The circuit on motherboard 107 amplifies, filters, and performs linear correction on the signal, converting it into a standard industrial output signal for easy reception and interpretation by subsequent equipment. The processed standard signal is transmitted to external equipment through wire 109. Wire 109 passes through the channel in the middle of locking nut 108 and forms a stable connection with motherboard 107, ensuring that the signal is transmitted without interference or attenuation.

[0034] After the locking nut 108 is installed, fill the mounting groove 102 with potting compound 111. The potting compound 111 can fill all the gaps between the locking nut 108, sensor 106, rubber gasket 105 and mounting groove 102, forming a sealing layer to prevent external water, oil, dust and other impurities from entering the interior. At the same time, the potting compound 111 has a certain structural strength, which can help withstand external pressure and improve the overall pressure bearing capacity of the equipment. The rubber gasket 105 is sleeved on the outer wall of the top of the connecting rod 115 and tightly connected to the bottom of the outer shell 101, further enhancing the sealing of the bottom of the outer shell 101. The double sealing design ensures that the equipment can work stably for a long time in complex environments such as outdoor humidity, rain or industrial oil pollution, and avoids damage to components due to water ingress and corrosion.

[0035] For small-range pressure detection scenarios, a vent hole 110 is opened inside the locking nut 108, and a waterproof and breathable membrane is attached inside the vent hole 110. This membrane allows gases generated inside the device due to temperature changes, such as the pressure difference caused by thermal expansion and contraction, to be discharged or drawn in, avoiding interference from abnormal internal air pressure on the detection accuracy of the sensor 106. At the same time, the waterproof and breathable membrane can block external moisture from entering, ensuring breathability without compromising waterproof performance, significantly improving the accuracy of small-range pressure detection. A damper 104 is fixedly connected to the inner wall of the groove 103 inside the connecting rod 115. The damper 104 can buffer the instantaneous impact of external pressure, avoiding damage to the sensor 106 caused by sudden pressure fluctuations, while ensuring that the pressure signal is smoothly transmitted to the sensor 106, reducing signal fluctuations, and further ensuring detection accuracy.

[0036] The dual sealing structure of rubber gasket 105 and potting compound 111 achieves excellent waterproof, impurity-proof, and pressure-bearing capabilities. Rubber gasket 105 fits onto the outer wall of the top of connecting rod 115 and is tightly bonded to the bottom of housing 101, initially preventing external moisture and dust from entering the mounting groove 102. At the same time, the potting compound 111 filling the mounting groove 102 fills all gaps between locking nut 108, sensor 106, rubber gasket 105, and mounting groove 102, forming a complete sealing layer that further isolates external water, oil, and other impurities. In addition, potting compound 111 has a certain structural strength, which can help withstand external pressure. Combined with the threaded connection between housing 101 and locking nut 108, the equipment can work stably for a long time in complex environments such as outdoor humidity, rain, or industrial oil pollution, avoiding damage to components due to water ingress, corrosion, or pressure impact, and significantly expanding the applicable scenarios of the equipment.

[0037] The mounting slot 102 inside the housing 101 precisely matches the size of the sensor 106, and the motherboard 107 matches the size of the groove 113 inside the locking nut 108. The components are nested together, significantly reducing the overall volume. At the same time, the groove 103 and the conical groove 114 inside the connecting rod 115 not only save space but also help to evenly transmit pressure to the detection surface of the sensor 106, avoiding local pressure concentration that could affect data accuracy. On the other hand, the vent hole 110 inside the locking nut 108 is covered with a waterproof and breathable membrane, which can balance the internal air pressure of the device, preventing abnormal air pressure from interfering with the accuracy of small-range detection, and preventing external moisture from entering. The motherboard 107 is connected to the sensor 106 via wires 109, and there is no need to fix the matching structure of the housing 101. Different models of sensor 106 or motherboard 107 can be replaced according to actual detection needs, achieving flexible matching and adapting to diverse pressure detection requirements. In addition, the damper 104 on the inner wall of the groove 103 can buffer the instantaneous impact of external pressure, reduce signal fluctuations, and further ensure detection accuracy.

[0038] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A small-sized split pressure transmitter sensor comprising a housing (101), characterized in that: The inside of the shell (101) is provided with a mounting groove (102), the bottom end of the shell (101) is fixedly connected with a connecting rod (115), the top end of the connecting rod (115) is provided with a conical groove two (114), and the inside of the connecting rod (115) is provided with a groove one (103).

2. The small-sized split type pressure transmitting sensor according to claim 1, characterized by: The inner wall of the groove one (103) is fixedly connected with a damper (104), the top end outer wall of the connecting rod (115) is sleeved with a rubber pad (105), the inside cavity of the mounting groove (102) is provided with a sensor (106), and the top end of the sensor (106) is fixedly connected with a mainboard (107).

3. The compact split pressure transmitter sensor of claim 2, wherein: The inside cavity top of the mounting groove (102) is threadedly connected with a locking nut (108), the inside of the locking nut (108) is provided with a groove two (113), the top end of the locking nut (108) is provided with a conical groove one (112), the middle part of the locking nut (108) is fixedly connected with a wire (109), the inside of the locking nut (108) is provided with a breathable hole (110), and the inside of the mounting groove (102) is filled with a glue filling (111).

4. The compact split pressure transmitter sensor of claim 3, wherein: The groove one (103), the conical groove two (114) and the mounting groove (102) are connected, the bottom end of the wire (109) is fixedly connected with the mainboard (107), and the size of the mainboard (107) is matched with the size of the groove two (113).

5. The compact split pressure transmitter sensor of claim 4, wherein: The rubber pad (105) is tightly combined with the shell (101), and the glue filling (111) is used for filling the gap between the locking nut (108), the sensor (106) and the rubber pad (105) and the mounting groove (102).

6. The compact split pressure transmitter sensor of claim 5, wherein: The inside of the breathable hole (110) is attached with a waterproof breathable film.

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