Flat membrane pressure transmitter
By introducing a buffer structure and a convenient replacement design into the flat diaphragm pressure transmitter, the problems of easy diaphragm deformation and inconvenient replacement are solved, thereby improving the durability and ease of replacement of the diaphragm.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHAANXI RUIDAOWEIER TECH CO LTD
- Filing Date
- 2025-09-17
- Publication Date
- 2026-05-19
AI Technical Summary
The diaphragm of existing flat diaphragm pressure transmitters is prone to deformation under long-term impact from high-pressure media, resulting in a short service life and inconvenient replacement.
A structure comprising a first housing, a second housing, a sealing gasket, a receiving cylinder, a diaphragm, a limiting ring, a spring, and a push rod is designed. The spring buffers the impact of high-pressure media, and the push rod facilitates diaphragm replacement, thereby improving the durability and ease of replacement of the diaphragm.
It effectively buffers the impact of high-pressure media on the diaphragm, extends the diaphragm's service life, simplifies the diaphragm replacement process, and improves the equipment's performance and durability.
Smart Images
Figure CN224262696U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pressure transmitter technology, specifically a flat diaphragm pressure transmitter. Background Technology
[0002] The flat diaphragm pressure transmitter is an analog pressure transmitter that uses a flat diaphragm structure, increasing the contact area with the medium. It features a wide temperature range, strong overload capacity and corrosion resistance, making it widely applicable. To ensure this series of pressure transmitters can adapt to various harsh environments, in addition to careful sensor selection, some active components are military-grade.
[0003] A patent search revealed a flat diaphragm pressure transmitter with publication number CN219694404U. This transmitter works by pulling a pull ring to move a connecting plate and a clamping plate to the right, compressing a second spring to disengage the clamping plate from its slot. Pulling the pull ring then causes the clamping plate to move vertically, which, under the action of the horizontal plate and guide plate, causes the connecting seat to move vertically, thereby causing the horizontal plate and the insert plate to move vertically as well. This stretches the first spring, causing the insert plate to disengage from its slot in the rectangular seat, releasing the first and second housings from fixation. This facilitates the removal and replacement of the diaphragm. However, since the diaphragm is relatively fixed inside the housing, prolonged and rigid contact with the high-pressure medium can easily cause deformation, resulting in a relatively short service life and poor performance. Therefore, we propose a flat diaphragm pressure transmitter to solve or improve these problems. Utility Model Content
[0004] The purpose of this invention is to provide a flat diaphragm pressure transmitter to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] A flat diaphragm pressure transmitter includes a first housing, a threaded joint fixed to the surface of the first housing, a sealing gasket disposed on one side of the first housing, a second housing disposed on one side of the sealing gasket, an internal thread formed on the inner surface of the second housing, a receiving cylinder fixed to the inner surface of the second housing, and a diaphragm placed inside the receiving cylinder.
[0007] A first limiting ring is fixed to the inner surface of the first housing. An installation ring is rotatably mounted on the surface of the first limiting ring. A connecting rod is inserted inside the installation ring. A pressure plate is fixed to the top of the connecting rod. A second limiting ring is fixed to the bottom of the connecting rod. A first spring is sleeved on the surface of the connecting rod.
[0008] As a preferred embodiment of this utility model, the connecting rods are arranged in several groups around the inner circumference of the mounting ring, the number of the first springs is the same as the number of connecting rods, one end of the first spring is fixed to the surface of the pressure plate, and the other end of the first spring is fixed to the surface of the mounting ring.
[0009] As a preferred embodiment of this utility model, a push rod is inserted inside the receiving cylinder, and several sets of push rods are arranged in a circular pattern inside the receiving cylinder. The push rod is located on one side of the diaphragm, and the bottom of the push rod has a third limiting ring.
[0010] As a preferred embodiment of this utility model, a limiting rod is inserted inside the third limiting ring, and two sets of the limiting rod are symmetrically inserted inside the third limiting ring. The limiting rod is fixed inside the second housing.
[0011] As a preferred embodiment of this utility model, a connecting baffle is slidably installed inside the second housing. Two sets of the connecting baffle are symmetrically slidably installed inside the second housing. A sliding groove is provided inside the second housing for the connecting baffle to move. The connecting baffle is fixedly connected to the third limiting ring through a fixing plate.
[0012] As a preferred embodiment of this utility model, a second spring is sleeved on the surface of the limiting rod, the number of the second springs is the same as the number of limiting rods, one end of the second spring is fixed to the surface of the third limiting ring, and the other end of the second spring is fixed to the inner surface of the second housing.
[0013] As a preferred embodiment of this utility model, a push block is fixed on the surface of the connecting baffle, and a sliding groove is provided on the surface of the second housing for the push block to move. The number of push blocks is the same as the number of connecting baffles.
[0014] As a preferred embodiment of this utility model, the surface of the first housing is provided with a receiving groove, and the surface of the second housing is provided with a receiving groove. The receiving grooves on the surfaces of the first housing and the second housing can be used to accommodate a sealing gasket.
[0015] Compared with the prior art, the beneficial effects of this utility model are:
[0016] 1. In this utility model, by setting a first spring and a pressing plate, the impact of the high-pressure medium on one side of the diaphragm can be buffered when one side surface of the pressing plate contacts the surface of the diaphragm, thereby avoiding the diaphragm from being deformed due to direct hard contact with the high-pressure medium, thus improving the service life of the diaphragm and having a relatively good effect.
[0017] 2. In this utility model, by setting a push rod, when the diaphragm needs to be replaced, the push block is pushed so that the push block drives the push rod to move through the connecting baffle and the third limiting ring, thereby pushing the diaphragm to move and pushing the diaphragm out of the inside of the receiving cylinder, which improves the convenience of personnel replacing the diaphragm. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the main structure of this utility model;
[0019] Figure 2 This is a schematic diagram of the structure of the receiving cylinder of this utility model;
[0020] Figure 3 This is a schematic cross-sectional view of the present invention.
[0021] Figure 4 This is a schematic diagram of the push rod structure of this utility model;
[0022] Figure 5 This is a schematic diagram of the pressing plate structure of this utility model.
[0023] In the diagram: 1. First housing; 2. Second housing; 3. Threaded joint; 4. Sealing gasket; 5. Push block; 6. Internal thread; 7. Receiving cylinder; 8. Connecting baffle; 9. Diaphragm; 10. First limiting ring; 11. Connecting rod; 12. Second limiting ring; 13. Mounting ring; 14. First spring; 15. Pressure plate; 16. Third limiting ring; 17. Limiting rod; 18. Push rod; 19. Second spring. Detailed Implementation
[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.
[0025] For examples, please refer to Figures 1-5 This utility model provides a technical solution:
[0026] A flat diaphragm pressure transmitter includes a first housing 1 with a receiving groove on its surface, a threaded connector 3 fixed to the surface of the first housing 1, a sealing gasket 4 disposed on one side of the first housing 1, a second housing 2 disposed on one side of the sealing gasket 4, and a receiving groove on its surface. The receiving grooves on the surfaces of the first housing 1 and the second housing 2 can accommodate the sealing gasket 4. An internal thread 6 is formed on the inner surface of the second housing 2. The first housing 1 can be threadedly installed to one side of the second housing 2 via the threaded connector 3 and the internal thread 6, thereby threading the first housing 1 and the second housing 2 into a whole. When the first housing 1 is threadedly installed to one side of the second housing 2 via the threaded connector 3 and the internal thread 6, the sealing gasket 4 is accommodated in the first housing 1. The first housing 1 is placed inside the placement groove of the second housing 2 and is pressed against the inner surface of the placement groove. The sealing gasket 4 can improve the sealing between the first housing 1 and the second housing 2 when the first housing 1 is threaded onto one side of the second housing 2 through the threaded joint 3 and the internal thread 6. The receiving cylinder 7 is fixed to the inner surface of the second housing 2. The diaphragm 9 is placed inside the receiving cylinder 7. The inner surface of the first housing 1 is fixed with a first limiting ring 10. The surface of the first limiting ring 10 is rotatably mounted with an installation ring 13. A connecting rod 11 is inserted into the inside of the installation ring 13. The connecting rod 11 passes through the inside of the installation ring 13 and is slidably connected with the installation ring 13. Several sets of connecting rods 11 are arranged circumferentially inside the installation ring 13. A pressure plate 15 is fixed to the top of the connecting rod 11. When the device moves, it will drive the fixed connecting rod 11 to move. A second limiting ring 12 is fixed to the bottom of the connecting rod 11. The second limiting ring 12 is simultaneously fixedly connected to the bottom of several sets of connecting rods 11. The second limiting ring 12 can restrict the position of the connecting rod 11 and prevent the connecting rod 11 from detaching from the inside of the mounting ring 13. A first spring 14 is sleeved on the surface of the connecting rod 11. The number of first springs 14 is the same as the number of connecting rods 11. One end of the first spring 14 is fixed to the surface of the pressure plate 15, and the other end of the first spring 14 is fixed to the surface of the mounting ring 13. When the pressure plate 15 moves, it will squeeze the first spring 14, causing the first spring 14 to deform and generate elastic potential energy. A push rod 18 is inserted inside the receiving cylinder 7. Several sets of push rods 18 are arranged circumferentially inside the receiving cylinder 7. Each push rod 18 is located on one side of the diaphragm 9. When the push rod 18 moves, it pushes the diaphragm 9 on one side to move. A third limiting ring 16 is inherently located at the bottom of each push rod 18. The third limiting ring 16 is fixedly connected to the bottom of several sets of push rods 18, thus restricting the position of the push rods 18 and preventing them from detaching from the receiving cylinder 7. Two sets of limiting rods 17 are symmetrically inserted inside the third limiting ring 16. The limiting rods 17 are fixed inside the second housing 2, passing through the inside of the third limiting ring 16 and slidingly connected to it. The limiting rods 17 restrict the position of the third limiting ring 16.To avoid or reduce the shaking and tilting of the third limiting ring 16 during movement, thus improving its stability, a connecting baffle 8 is slidably installed inside the second housing 2. Two sets of connecting baffles 8 are symmetrically slidably installed inside the second housing 2. A groove is provided inside the second housing 2 for the connecting baffles 8 to move. The connecting baffles 8 are fixedly connected to the third limiting ring 16 via a fixing plate. When the connecting baffles 8 move, they drive the fixed third limiting ring 16 to move. When the third limiting ring 16 moves, it drives the fixed push rod 18 to move. A second spring 19 is sleeved on the surface of the limiting rod 17. The number of second springs 19 is the same as the number of limiting rods 17. One end of the second spring 19 is fixed to the surface of the third limiting ring 16, and the other end of the second spring 19... One end is fixed to the inner surface of the second housing 2. When the connecting baffle 8 moves and drives the third limiting ring 16 to move, the third limiting ring 16 will squeeze the second spring 19, causing the second spring 19 to deform. When there is no external force interference, the second spring 19 can push the third limiting ring 16 to move and reset it. A push block 5 is fixed on the surface of the connecting baffle 8. A sliding groove is opened on the surface of the second housing 2 for the push block 5 to move. The number of push blocks 5 is the same as the number of connecting baffles 8. The surface of the push block 5 is provided with anti-slip grooves. The anti-slip grooves can increase the contact area between the fingers and the push block 5 when the personnel push the push block 5, thereby increasing the friction between the push block 5 and the personnel's fingers and reducing the phenomenon of slippage when the personnel push the push block 5 to move. When the push block 5 moves, it will drive the fixed connecting baffle 8 to move.
[0027] The working process of this utility model is as follows: When the first housing 1 is threaded onto one side of the second housing 2 via the threaded joint 3 and the internal thread 6, the surface of the pressure plate 15 will contact the surface of the diaphragm 9, and the pressure plate 15 can be pressed against the surface edge of the diaphragm 9 by the first spring 14, thereby limiting the diaphragm 9 to a certain extent. At this time, when one side of the diaphragm 9 is impacted by the high-pressure medium, the diaphragm 9 itself will move a certain distance and push the pressure plate 15 to move, thereby causing the pressure plate 15 to squeeze the first spring 14. The first spring 14 absorbs the impact force, thereby buffering the impact force of the high-pressure medium acting on one side of the diaphragm 9, avoiding direct hard contact between the diaphragm 9 and the high-pressure medium, which would cause the diaphragm 9 to deform, thus improving the service life of the diaphragm 9. The effect is relatively good. At the same time, when the diaphragm 9 needs to be replaced, the threaded joint should be closed first. When the first housing 1 on one side of the second housing 2 is removed, pushing the push block 5 will cause the connecting baffle 8 to move, thereby causing the connecting baffle 8 to move the third limiting ring 16. When the third limiting ring 16 moves, it will cause the fixed push rod 18 to move, thereby causing the push rod 18 to push the diaphragm 9 to move, thus pushing the diaphragm 9 out of the inside of the receiving cylinder 7, which improves the convenience of personnel replacing the diaphragm 9. At the same time, the rotational connection between the mounting ring 13 and the first limiting ring 10 can prevent the mounting ring 13, the first spring 14 and the pressing plate 15 from rotating when the first housing 1 rotates and is threadedly connected to the second housing 2 and the surface of the pressing plate 15 contacts the surface of the diaphragm 9. This avoids the pressing plate 15 rotating and rubbing against the diaphragm 9, which would cause damage to the surface of the diaphragm 9, and improves the durability of the diaphragm 9.
[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A flat diaphragm pressure transmitter, comprising a first housing (1), a threaded joint (3) fixed to the surface of the first housing (1), a sealing gasket (4) disposed on one side of the first housing (1), a second housing (2) disposed on one side of the sealing gasket (4), an internal thread (6) formed on the inner surface of the second housing (2), a receiving cylinder (7) fixed to the inner surface of the second housing (2), and a diaphragm (9) placed inside the receiving cylinder (7), characterized in that: A first limiting ring (10) is fixed on the inner surface of the first housing (1). An installation ring (13) is rotatably mounted on the surface of the first limiting ring (10). A connecting rod (11) is inserted inside the installation ring (13). A pressure plate (15) is fixed on the top of the connecting rod (11). A second limiting ring (12) is fixed on the bottom of the connecting rod (11). A first spring (14) is sleeved on the surface of the connecting rod (11).
2. The flat diaphragm pressure transmitter according to claim 1, characterized in that, The connecting rods (11) are arranged in several groups around the inner circumference of the mounting ring (13). The number of the first springs (14) is the same as the number of the connecting rods (11). One end of the first spring (14) is fixed to the surface of the pressure plate (15), and the other end of the first spring (14) is fixed to the surface of the mounting ring (13).
3. A flat diaphragm pressure transmitter according to claim 1, characterized in that, A push rod (18) is inserted inside the receiving cylinder (7). Several sets of push rods (18) are arranged in a circular pattern inside the receiving cylinder (7). The push rod (18) is located on one side of the diaphragm (9). The bottom of the push rod (18) has a third limiting ring (16).
4. A flat diaphragm pressure transmitter according to claim 3, characterized in that, The third limiting ring (16) is provided with a limiting rod (17) inserted inside. Two sets of the limiting rod (17) are symmetrically inserted inside the third limiting ring (16). The limiting rod (17) is fixed inside the second housing (2).
5. A flat diaphragm pressure transmitter according to claim 3, characterized in that, The second housing (2) has a connecting baffle (8) slidably installed inside. Two sets of the connecting baffle (8) are symmetrically slidably installed inside the second housing (2). The second housing (2) has a sliding groove for the connecting baffle (8) to move inside. The connecting baffle (8) is fixedly connected to the third limiting ring (16) through a fixing plate.
6. A flat diaphragm pressure transmitter according to claim 4, characterized in that, The surface of the limiting rod (17) is fitted with a second spring (19). The number of the second springs (19) is the same as the number of the limiting rods (17). One end of the second spring (19) is fixed to the surface of the third limiting ring (16), and the other end of the second spring (19) is fixed to the inner surface of the second housing (2).
7. A flat diaphragm pressure transmitter according to claim 5, characterized in that, The surface of the connecting baffle (8) is fixed with a push block (5), and the surface of the second housing (2) is provided with a sliding groove for the push block (5) to move. The number of push blocks (5) is the same as the number of connecting baffles (8).
8. A flat diaphragm pressure transmitter according to claim 1, characterized in that, The surface of the first housing (1) is provided with a receiving groove, and the surface of the second housing (2) is provided with a receiving groove. The receiving grooves on the surfaces of the first housing (1) and the second housing (2) can be used to accommodate the sealing gasket (4).