Ceramic pressure transmitter easy to install

Abstract

The utility model relates to a ceramic pressure transmitter easy to install, which comprises a base, a shell, a lower support, an upper support, a circuit board, a ceramic core body and an adapter which are coaxially arranged, the lower support and the upper support are clamped and fixed in a cavity between the base and the shell by the base and the shell, and the adapter is fixedly arranged at the top end of the shell; the upper end face of an inner ring of the lower support is provided with a groove capable of containing the O-shaped ring, the ceramic core body is clamped and fixed in an inner cavity of the lower support through the upper support and the O-shaped ring, and the circuit board is clamped and fixed between the upper support and the ceramic core body. A pin fixedly arranged at the top end of the circuit board upwards penetrates through the upper support and the shell, an interface terminal arranged at the lower end of the adapter can be inserted into the pin, and a tin cavity is formed in the interface terminal. The cylindrical pressure transmitter with the ceramic core body can be rapidly assembled through the upper support, the lower support and the interface terminal, manual tin soldering is not needed for wiring, the assembling process is simple and labor-saving, good maintainability is achieved, and the maintenance cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of transmitter structures, in particular to a ceramic pressure transmitter with easy installation. Background Art

[0002] A pressure transmitter is a device that converts pressure into pneumatic or electric signals for control and remote transmission, and is one of the most common sensors in industrial field applications. Among them, the ceramic pressure transmitter is widely used in the pressure measurement of gases, liquids, and steam in various industries such as electric power, metallurgy, petrochemical, and fire protection due to its characteristics of wear resistance and corrosion resistance. At the same time, the production cost of the ceramic pressure transmitter is relatively low, which is a great benefit for cost-sensitive customers.

[0003] The assembly process of the existing pressure transmitter is laborious and requires high skills. When maintenance is needed later, disassembly is time-consuming and laborious, and it is impossible to achieve the purpose of reliable assembly and easy disassembly. For example, Chinese Patent Application No. 202220136497.X discloses a ceramic pressure transmitter with easy installation, which uses modular components to cooperate with each other for installation. The assembly process is simple and labor-saving, and it has good maintainability, reducing the maintenance cost.

[0004] However, the assembly process in the above-mentioned published document requires manual soldering of the signal wires of the circuit board to the electrical joint assembly (i.e., the adapter), which still has a certain degree of assembly difficulty. In addition, the above-mentioned published document discloses a thin-film ceramic core, and the related structure disclosed therein cannot be directly applied to the assembly of a cylindrical ceramic core. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a ceramic pressure transmitter with easy installation to solve the above problems existing in the prior art.

[0006] To solve the above problems, the utility model provides a ceramic pressure transmitter with easy installation, which includes a base, a housing, a lower bracket, an upper bracket, a circuit board, a ceramic core, and an adapter coaxially arranged. The lower bracket and the upper bracket are clamped and fixed in the cavity between the base and the housing by the base and the housing, and the adapter is fixedly arranged at the top of the housing. The axial section of the lower bracket is in a pair of L shapes, and a groove for placing an O-ring is provided on the upper end surface of the inner circle of the lower bracket. The ceramic core is clamped and fixed in the inner cavity of the lower bracket by the upper bracket and the O-ring, and the circuit board is clamped and fixed between the upper bracket and the ceramic core. The pins fixedly arranged at the top of the circuit board pass upward through the upper bracket and the housing, and the interface terminals provided at the lower end of the adapter can be inserted into the pins, and a tin cavity is provided in the interface terminals.

[0007] The ceramic pressure transmitter with easy installation provided by the utility model also has the following technical features:

[0008] Furthermore, the height of the groove is less than the radius of the O-ring; the height from the upper end surface of the lower bracket to the groove is greater than the height of the ceramic core and less than the sum of the height of the ceramic core and the diameter of the O-ring.

[0009] Furthermore, the axial section of the upper bracket is in a paired L shape, and a ring groove for embedding the circuit board is provided on its lower end surface. The lower end surface of the upper bracket abuts against both the lower bracket and the ceramic core at the same time.

[0010] Furthermore, the base and the housing are fixedly connected by screw threads, and a sealing sheet is provided at the joint of the two structures.

[0011] Furthermore, a tapered opening with a downward opening is provided inside the interface terminal, and the tapered opening communicates with the tin cavity, and the tin cavity is located directly above the tapered opening.

[0012] Furthermore, the interface terminal extends downward from the lower surface of the adapter, and a through hole is provided at the top of the housing for passing through the interface terminal.

[0013] Furthermore, the adapter and the top of the housing are fixedly connected by bolts with gaskets, and a sealing gasket is provided between the adapter and the top of the housing.

[0014] Furthermore, an annular gasket is provided between the bottom end surface of the lower bracket and the base.

[0015] Furthermore, the height of the inner cavity of the base is greater than the sum of the heights of the lower bracket and the annular gasket.

[0016] Furthermore, the lower bracket, the upper bracket and the adapter are made of insulating materials.

[0017] The utility model has the following beneficial effects: The ceramic pressure transmitter of the utility model with easy installation can quickly assemble the cylindrical ceramic core pressure transmitter through the upper bracket, the lower bracket and the interface terminal, without using manual soldering for wiring. The assembly process is simple and labor-saving, and it has good maintainability, reducing the maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 is Figure 1 a sectional view along line A-A;

[0020] Figure 3 is Figure 2 a schematic exploded view of the structure;

[0021] Figure 4 is Figure 3 a further schematic exploded view of some components of ;

[0022] Figure 5 is Figure 1 the structural decomposition schematic diagram of

[0023] Figure 6 is Figure 2 the detail drawing at position B of

[0024] Figure 7 is Figure 3 the detail drawing at position C of Specific embodiments

[0025] The present utility model will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments. It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments may be combined with each other.

[0026] For example Figures 1 to 7 in the embodiment of the simply-installable ceramic pressure transmitter of the present utility model shown, the simply-installable ceramic pressure transmitter includes a base 1, a housing 2, a lower bracket 3, an upper bracket 4, a circuit board 5, a ceramic core 6 and a adapter 7. The above structures all adopt a quasi-cylindrical structure, and the above structures are all coaxially arranged.

[0027] Specifically, the inner and outer diameters of the base 1 and the housing 2 are the same, and the base 1 and the housing 2 are fixedly connected; the lower bracket 3 and the upper bracket 4 are clamped and fixed by the base 1 and the housing 2 in the cavity between the base 1 and the housing 2, and the lower bracket 3 and the upper bracket 4 are in contact and connected; the circuit board 5 and the ceramic core 6 are arranged between the lower bracket 3 and the upper bracket 4, and the adapter 7 is fixedly arranged at the top of the housing 2.

[0028] The axial section of the lower bracket 3 is in a pair of L shapes, and the two L shapes are symmetrical. A groove 3a for placing an O-ring 31 is provided on the upper end surface of the inner circle of the lower bracket 3 (i.e., the lower horizontal line of the L shape). The ceramic core 6 is clamped and fixed in the inner cavity of the lower bracket 3 by the upper bracket 4 and the O-ring 31; the cavity between the ceramic core 6 and the base 1 is the detection cavity, and the height of the inner circle of the lower bracket 3 is the height of the detection cavity.

[0029] The O-ring 31 is arranged in the groove 3a. When the pressure in the detection cavity changes, the groove 3a will limit the deformation of the O-ring 31, preventing the O-ring 31 from deforming due to the decrease in pressure and causing the O-ring 31 to fail; moreover, during the assembly process, the O-ring 31 can be simply placed into the groove 3a, simplifying the assembly process.

[0030] The circuit board 5 is clamped and fixed between the upper bracket 4 and the ceramic core 6. The pins 51 fixedly provided at the top of the circuit board 5 pass upward through the upper bracket 4 and the housing 2. The interface terminal 71 provided at the lower end of the adapter 7 can be inserted into the pins 51, and a tin cavity 7a is provided in the interface terminal 71; providing the tin cavity 7a can simplify the assembly process, and during the assembly process, only the tin cavity needs to be heated to quickly connect the pins 51 with the adapter 71.

[0031] In one embodiment of the present application, preferably, the height of the groove 3a is smaller than the radius of the O-ring 31; the height from the upper end surface of the lower bracket 3 to the groove 3a is greater than the height of the ceramic core 6, and less than the sum of the height of the ceramic core 6 and the diameter of the O-ring 31; in this way, when the top ends of the lower bracket 3 and the ceramic core 6 simultaneously abut against the upper bracket 4, the ceramic core 6 compresses and deforms the O-ring 31, and the sealing effect is good. The ceramic core 6 will not abut against the inner ring of the lower bracket 3 to cause interference damage. At the same time, the deformed O-ring 31 will also be mostly sunk into the groove 3a to prevent the O-ring 31 from deforming due to pressure changes and causing sealing failure.

[0032] In one embodiment of the present application, preferably, the axial cross-section of the upper bracket 4 is in a pair of L-shapes, the two L-shapes are symmetrical, and an annular groove 4a in which a circuit board 5 can be embedded is provided at the inner circle of the lower end surface of the upper bracket 4, and the annular groove 4a abuts against the circuit board 5. The circuit board 5 is installed on the upper end of the ceramic core 6, and the lower end surface of the upper bracket 4 abuts against the lower bracket 3 and the ceramic core 6 at the same time, and the upper end surface of the upper bracket 4 abuts against the outer shell 2.

[0033] In one embodiment of the present application, preferably, the base 1 and the shell 2 are fixedly connected by threaded cooperation, and a sealing sheet is provided at the structure of the two; the thread uses a high-precision thread, so that when the thread is screwed into the deepest position, the adapter 7 is just fixedly installed on the shell 2, and the interface terminal 71 and the pin 51 can correspond one by one, which is convenient for assembly.

[0034] In one embodiment of the present application, preferably, a tapered opening 7b opening downward is provided in the interface terminal 71, and the tapered opening 7b is communicated with the tin cavity 7a, and the tin cavity 7a is located directly above the tapered opening 7b. In this way, the pin 51 can be inserted into the tin cavity 7a through the tapered opening 7b more quickly, which is convenient for assembly.

[0035] In one embodiment of the present application, preferably, the interface terminal 71 extends downward from the lower surface of the adapter 7, and a through hole 2a is provided at the top of the shell 2 for passing the interface terminal 71. In this way, the through hole 2a avoids the interface terminal 71, and the adapter 7 contacts the upper side of the shell 2 to facilitate sealing.

[0036] In one embodiment of the present application, preferably, the adapter 7 and the outer shell 2 are integrally sealed and connected. Specifically, the adapter 7 and the top of the outer shell 2 are fixedly connected by bolts with sealing gaskets, and a sealing gasket 72 is provided between the adapter 7 and the top of the outer shell 2. The bolts pass through the adapter 7 and the sealing gasket 72 and cooperate with the threaded holes on the outer shell 2.

[0037] In one embodiment of the present application, preferably, an annular gasket 32 ​​is provided between the bottom end surface of the lower bracket 3 and the base 1 , and the shape of the annular gasket 32 ​​is consistent with the shape of the lower end surface of the lower bracket 3 to prevent leakage in the detection cavity.

[0038] In one embodiment of the present application, preferably, the height of the inner cavity of the base 1 is greater than the sum of the heights of the lower bracket 3 and the annular gasket 32, so that the inner cavity of the base 1 can accommodate the lower bracket 3 and the upper bracket 4 at the same time during installation, which is convenient for assembly.

[0039] In one embodiment of the present application, preferably, the lower bracket 3, the upper bracket 4 and the adapter 7 are made of insulating materials, so that the circuit board 5 is effectively insulated to prevent external current from interfering with the accuracy of the pressure data.

[0040] The utility model discloses an assembly method of a ceramic pressure transmitter which is easy to install: the cavity opening of the base 1 is facing upwards, and an annular gasket 32, a lower bracket 3, an O-ring 31, a ceramic core 6 and a circuit board 5 (the two are fixedly connected), and an upper bracket 4 are sequentially placed in the inner cavity of the base 1, and the housing 2 is inserted into the upper bracket 4 and fixedly connected with the base 1 through threads; then the tin cavity 7a is heated, and the pin 51 is inserted into the tin cavity 7a through the tapered opening 7b of the interface terminal 71, and after the sealing gasket 72 is placed on the top of the housing 2, the adapter 7 is finally fixedly installed on the housing 2 by bolts to complete the assembly.

[0041] The utility model discloses a ceramic pressure transmitter which is easy to install. The pressure transmitter with a cylindrical ceramic core can be quickly assembled through an upper bracket, a lower bracket and an interface terminal. There is no need to use manual soldering for wiring. The assembly process is simple and labor-saving. The utility model has good maintainability, thereby reducing maintenance costs.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A ceramic pressure transmitter that is easy to install, characterized in that: The invention comprises a coaxially arranged base (1), a shell (2), a lower bracket (3), an upper bracket (4), a circuit board (5), a ceramic core (6) and an adapter (7); the lower bracket (3) and the upper bracket (4) are clamped and fixed in a cavity between the base (1) and the shell (2) by the base (1) and the shell (2); the adapter (7) is fixedly arranged at the top of the shell (2); the axial cross section of the lower bracket (3) is in a paired L-shape; the upper end surface of the inner ring of the lower bracket (3) is provided with a slot for placing an O-ring (3 1), the ceramic core (6) is clamped and fixed in the inner cavity of the lower bracket (3) by the upper bracket (4) and the O-ring (31), and the circuit board (5) is clamped and fixed between the upper bracket (4) and the ceramic core (6); a pin (51) fixedly provided at the top of the circuit board (5) passes upward through the upper bracket (4) and the housing (2), and an interface terminal (71) provided at the lower end of the adapter (7) can be inserted into the pin (51), and a tin cavity (7a) is provided in the interface terminal (71).

2. The ceramic pressure transmitter with easy installation according to claim 1 is characterized in that: The height of the groove (3a) is smaller than the radius of the O-ring (31); the height from the upper end surface of the lower bracket (3) to the groove (3a) is greater than the height of the ceramic core (6) and less than the sum of the height of the ceramic core (6) and the diameter of the O-ring (31).

3. The ceramic pressure transmitter with easy installation according to claim 2 is characterized in that: The axial cross-section of the upper bracket (4) is in a paired L-shape, and the lower end surface thereof is provided with an annular groove (4a) capable of embedding the circuit board (5). The lower end surface of the upper bracket (4) abuts against the lower bracket (3) and the ceramic core (6) at the same time.

4. The ceramic pressure transmitter with easy installation according to claim 1 is characterized in that: The base (1) and the housing (2) are fixedly connected via threaded engagement, and a sealing sheet is provided at the structure of the two.

5. The ceramic pressure transmitter with easy installation according to claim 4, characterized in that: A tapered opening (7b) opening downward is provided in the interface terminal (71); the tapered opening (7b) is communicated with the tin cavity (7a); and the tin cavity (7a) is located directly above the tapered opening (7b).

6. The ceramic pressure transmitter with easy installation according to claim 5, characterized in that: The interface terminal (71) extends downward from the lower surface of the adapter (7), and a through hole (2a) is provided at the top of the housing (2) for passing the interface terminal (71).

7. The ceramic pressure transmitter with easy installation according to claim 6, characterized in that: The adapter (7) and the top end of the housing (2) are fixedly connected via bolts with sealing gaskets, and a sealing gasket (72) is provided between the adapter (7) and the top end of the housing (2).

8. The ceramic pressure transmitter with easy installation according to claim 1, characterized in that: An annular gasket (32) is provided between the bottom end surface of the lower bracket (3) and the base (1).

9. The ceramic pressure transmitter with easy installation according to claim 8, characterized in that: The height of the inner cavity of the base (1) is greater than the sum of the heights of the lower bracket (3) and the annular gasket (32).

10. The ceramic pressure transmitter with easy installation according to claim 1, characterized in that: The lower bracket (3), the upper bracket (4) and the adapter (7) are made of insulating material.

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