A joint for protecting a pressure gauge

Abstract

The present invention discloses a joint for protecting a pressure gauge, comprising a cover, and one end of the cover is threadedly connected to the pressure gauge, and the other end of the cover is provided with a gasket groove, and is fitted with the bladder through the gasket groove, the outer surface of the bladder is rotatably connected with a gasket, and is threadedly connected to the cover through a provided joint body, thereby pushing the gasket and the bladder to be tightly connected between the cover and the joint body; due to the effect of the gasket, the end face of the bladder will not be torn or wrinkled, especially the gasket can rotate axially with the end face of the joint body, avoiding direct contact between the joint body and the bladder, resulting in wrinkles and tears in the bladder, and at the same time, the gasket groove can fix the other end face of the bladder, so that the end face of the bladder is squeezed in the gasket groove to improve the sealing performance of the bladder, and effectively avoid direct contact between the medium and the pointer and electrical contact points of the pressure gauge, so the present invention is worthy of promotion and application.

Description

Technical Field

[0001] The invention relates to the technical field of pressure gauge protection, in particular to a joint for protecting a pressure gauge. Background Art

[0002] The pressure gauges mentioned in this specification refer to elastic pressure gauges and electrical pressure gauges, and elastic pressure gauges refer to single-turn spring tube pressure gauges, such as radial and axial case structures, electric contact pressure gauges and diaphragms, diaphragm boxes, and diaphragm pressure gauges. Electrical pressure gauges refer to resistance remote pressure gauges and differential remote pressure gauges. These pressure gauges are widely used due to their simple structure, firm and reliable pressure measurement range, convenient use, sufficient accuracy, convenient pressure signal remote transmission, and low cost. However, they cannot work normally when measuring the flow medium, such as gas, steam and liquid, with vibration, easy to block: for example, easy to crystallize, contain solid debris or dust, viscous, easy to scale, easy to solidify, corrosive, low temperature freezing conditions, and installed under mechanical vibration and impact conditions, and their application range is limited. Therefore, the office developed a patent number CN02202024, and the patent name became the invention patent of the pressure gauge connector. However, through more than ten years of use and customer feedback, it is known that when the bladder is installed, the connection between the bladder, the cover and the connector body is easily wrinkled due to rotation, resulting in a poor seal, and even the bladder may be torn. Summary of the invention

[0003] The object of the present invention is to provide a joint for protecting a pressure gauge to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a connector for protecting a pressure gauge, comprising a cover, and one end of the cover is threadedly connected to the pressure gauge, and the other end of the cover is threadedly connected to a connector body; the cover and the connector body are threadedly connected, and a bag is sealed between the two; a gasket is rotatably connected to the outer surface of the gasket; when the connector body and the cover rotate relative to each other, the gasket is driven to rotate on the gasket, thereby sealing the gasket between the cover and the connector body.

[0005] As a preferred technical solution of the present invention: a guide column is further provided at the center of the cover, and a through hole for pressure transmission is provided at the center of the guide column.

[0006] As a preferred technical solution of the present invention: the cover is cylindrical and has a thread on its outer surface that matches the thread of the connector body. The end of the cover away from the connector body is threadedly connected to the pressure gauge through a connecting end, and the cross-section of the connecting end on the horizontal plane is hexagonal.

[0007] As a preferred technical solution of the present invention: a cavity is further provided inside the cover, wherein the guide post is located in the center of the cavity.

[0008] As a preferred technical solution of the present invention: a gasket groove is further provided on the end surface of the cover facing the connector body, and the gasket groove is used to limit the further movement of the bag.

[0009] As a preferred technical solution of the present invention: the bag is also provided with a bag opening for fitting with the padding groove; wherein one side of the liner fits with the bag opening, and the other side fits with the joint body.

[0010] As a preferred technical solution of the present invention: the connector body is threadably matched with the cover via a provided connecting portion.

[0011] As a preferred technical solution of the present invention: a cavity for accommodating the bag is provided inside the connector body, and the cavity is connected and communicated with the connecting portion.

[0012] As a preferred technical solution of the present invention: an end of the connector body away from the cover is further provided with an external threaded column.

[0013] By adopting the above technical scheme, the beneficial effects of the present invention are: through the threaded connection between the connector body and the cover, the gasket and the bladder are pushed to be tightly connected between the cover and the connector body; due to the action of the gasket, the end face of the bladder will not be torn or wrinkled, especially the gasket can rotate axially with the end face of the connector body, avoiding direct contact between the connector body and the bladder, which causes wrinkles and tears in the bladder. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the decomposed structure of the main structure of the present invention;

[0015] Figure 2 It is a cross-sectional schematic diagram of the main structure of the present invention;

[0016] Figure 3 It is a schematic cross-sectional structural diagram of the cover of the present invention.

[0017] In the figure: 1. cover; 2. gasket; 3. joint body; 4. external threaded column; 5. bag; 6. bag opening; 7. connecting end; 8. connecting part; 9. through hole; 10. guide column; 11. cavity; 12. gasket groove; 13. cavity. DETAILED DESCRIPTION

[0018] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and cannot be understood as limiting the present invention. In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "upper surface", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral body; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0019] See also Figure 1-3 , an embodiment of the present invention: a connector for protecting a pressure gauge, comprising a cover 1, and one end of the cover 1 is threadedly connected to the pressure gauge, and the other end of the cover 1 is threadedly connected to a connector body 3; through the threaded connection between the cover 1 and the connector body 1, a bag 5 is sealed and connected between the two; a gasket 2 is rotatably connected to the outer surface of the bag 5; when the connector body 3 and the cover 1 rotate relative to each other, the gasket 2 is driven to rotate on the bag 5, thereby sealing the bag 5 between the cover 1 and the connector body 3. Through the threaded connection between the connector body 3 and the cover 1, the gasket 2 and the bag 5 are pushed to be tightly connected between the cover 1 and the connector body 3; on the basis of ensuring that the device solves the original problem, through the action of the gasket 2, the end face of the bag 5 will not be torn or wrinkled, especially the gasket 2 can follow the end face of the connector body 3 to rotate axially, avoiding direct contact between the connector body 3 and the bag 5, thereby causing the bag 5 to wrinkle and tear.

[0020] In order to facilitate the transmission of pressure, a guide column 10 is further provided at the center of the cover 1 , and a through hole 9 for pressure transmission is provided at the center of the guide column 10 .

[0021] In order to facilitate the connection between the cover 1 and the connector body 3, the cover 1 is cylindrical and has a thread on its outer surface that matches the thread of the connector body 3. The end of the cover 1 away from the connector body 3 is threadedly connected to the pressure gauge through a connecting end 7, and the cross-section of the connecting end 7 on the horizontal plane is hexagonal.

[0022] Furthermore, a cavity 11 is provided inside the cover 3, wherein the guide column 10 is located in the center of the cavity 11. Due to the provision of the cavity 11, the deformation of the bladder 5 is greater, thereby reducing slight deviations in pressure detection caused by the bladder 5 itself, thereby further improving the accuracy of pressure gauge detection.

[0023] In order to further solve the problem of wrinkles and tears in the sac bag 5, a gasket groove 12 is further provided on the end face of the cover 1 facing the joint body 3, and the gasket groove 12 is used to limit the further movement of the sac bag 5. The gasket groove 12 is set so that the end face of the sac bag 5 is further compacted, thereby improving the sealing degree and preventing the eccentric movement of the sac bag 5. Therefore, the end face of the sac bag 5 fits flat with the end face of the gasket groove 12 without wrinkles, thereby preventing the sac bag 5 from tearing.

[0024] In order to further improve the degree of sealing and avoid leakage of the medium, the bag 5 is also provided with a bag opening 6 for fitting with the gasket groove 12; wherein one side of the gasket 2 fits with the bag opening 6, and the other side fits with the joint body 3. Since the bag opening 6 is provided, when the joint body 3 and the cover 1 are squeezed, the bag opening 6 extends radially to expand the contact area with the end face of the cover 1 and the end face of the joint body 3, thereby greatly improving the sealing performance of the bag 5.

[0025] Since the connector body 3 is threadably matched with the cover 1 via the connecting portion 8, the connection portion 8 allows the connector body 3, the bladder 5 and the cover 1 to be connected separately, thereby reducing the problem of interference between the three due to the connection. For example, when the cover 1 is installed on the connector body 3, the bladder 5 may be axially twisted due to rotation. Therefore, while the bladder 5 transmits pressure, interference between them may be avoided, resulting in large detection deviations in the pressure gauge or direct contact between the sensitive components of the pressure gauge and the medium.

[0026] In order to provide sufficient deformation space for the sac 5 to prevent inaccurate detection due to deformation obstruction of the sac 5 , a cavity 13 for accommodating the sac 5 is provided inside the connector body 3 , and the cavity 13 is connected to the connecting portion 8 .

[0027] Since an external thread column 4 is further provided at one end of the joint body 3 away from the cover 1 , the device can be installed at a designated position through the external thread column 4 , making the installation and disassembly of the device simple and convenient.

[0028] Through the above technical scheme, the present invention is also easy to disassemble and assemble, so that the removal and installation of the bag 5 are simple and easy, so that the device can extend the service life of the entire equipment by replacing the cheap bag 5. At the same time, when the device is used for detection, the simple, convenient and detachable bag 5 greatly shortens the maintenance time of the device. When detecting a medium that is easy to clog, it is only necessary to remove the bag 5 and replace it with a new bag 5. At the same time, the removed bag 5 can continue to be used after cleaning and unblocking, which greatly reduces the maintenance cost of the device.

[0029] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. A joint for protecting a pressure gauge, characterized in that: It comprises a cover (1), one end of which is threadedly connected to a pressure gauge, and the other end of which is threadedly connected to a joint body (3); The cover (1) and the connector body (3) are connected by threads, thereby sealingly connecting the bag (5) therebetween; The outer surface of the bag (5) is rotatably connected to a gasket (2); when the joint body (3) and the cover (1) rotate relative to each other, the gasket (2) on the bag (5) is driven to rotate, thereby sealing the bag (5) between the cover (1) and the joint body (3); The cover (1) is cylindrical and has a thread on its outer surface that matches the thread of the connector body (3). The end of the cover (1) away from the connector body (3) is threadedly connected to the pressure gauge via a connecting end (7), and the cross-section of the connecting end (7) on a horizontal plane is hexagonal. The end surface of the cover (1) facing the connector body (3) is also provided with a gasket groove (12), and the gasket groove (12) is used to limit the further movement of the bag (5); The bag (5) is also provided with a bag opening (6) for fitting with the gasket groove (12); one side of the liner (2) fits with the bag opening (6), and the other side fits with the connector body (3); the connector body (3) is threadably matched with the cover (1) via a connecting portion (8) provided thereon.

2. A joint for protecting a pressure gauge according to claim 1, characterized in that: A guide column (10) is also provided at the center of the circle of the cover (1), and a through hole (9) for pressure transmission is provided at the center of the circle of the guide column (10).

3. A joint for protecting a pressure gauge according to claim 2, characterized in that: A cavity (11) is also provided inside the cover (1), wherein the guide post (10) is located in the center of the cavity (11).

4. A joint for protecting a pressure gauge according to claim 3, characterized in that: A cavity (13) for accommodating the sac (5) is provided inside the connector body (3), and the cavity (13) is connected and communicated with the connecting portion (8).

5. A joint for protecting a pressure gauge according to any one of claim 1 or claim 3 or claim 4, characterized in that: An end of the joint body (3) away from the cover (1) is also provided with an external threaded column (4).

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