Anti-freezing leakage-proof pressure gauge connector

Abstract

The invention relates to the technical field of pressure gauge connectors, and discloses an anti-freezing leakage-proof pressure gauge connector which comprises an outer sleeve, a first cover body is arranged on one side of the outer sleeve, a pressure gauge can be installed on the first cover body, a second cover body is arranged on the other side of the outer sleeve, the outer sleeve is provided with a containing groove and a containing hole, and a separation structure is arranged in the containing groove. A second material passing groove and a second material passing hole are formed in the second cover body, and a blocking structure is arranged in the second material passing groove; the blocking structure comprises a limiting ring arranged in the containing hole, a one-way valve needle and a blocking spring, the one-way valve needle and the blocking spring are arranged in the second material passing groove, a through hole is formed in the limiting ring, a blocking valve element capable of blocking the through hole is arranged in the through hole in a penetrating mode, a channel groove is formed in the blocking valve element, a channel hole is formed in the side face of the blocking valve element, and the channel hole communicates with the channel groove. And one end of the blocking spring abuts against the one-way valve needle, the other end of the blocking spring abuts against the blocking valve element, the one-way valve needle can block the channel groove, and the effect of improving the leakage-proof performance of the connector is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of pressure gauge connectors, and in particular to an antifreeze and anti-leakage pressure gauge connector. Background Art

[0002] The pressure gauge connector is a connector used to connect the device or pipeline of the measured medium and the pressure gauge.

[0003] In the related art, there is a pressure gauge connector, one end of which is connected to a pressure instrument, and the other end of which is connected to a medium device to be measured / a medium pipeline to be measured.

[0004] When the pressure instrument is damaged, the medium in the medium device / medium pipeline to be measured can enter the environment through the damaged part of the pressure instrument. If the medium is harmful or flammable and explosive, it is easy to cause accidents such as poisoning, fire or explosion when the above medium enters the environment. Summary of the invention

[0005] In order to improve the leak-proof performance of a joint, the present application provides a freeze-proof and leak-proof pressure gauge joint.

[0006] The present application provides an antifreeze and anti-leakage pressure gauge connector, which adopts the following technical solution: A freeze-proof and leak-proof pressure gauge joint, comprising a jacket, a first cover body is provided on one side of the jacket, a pressure instrument can be installed on the first cover body, a second cover body is provided on the other side of the jacket, a receiving groove is provided on the end surface of the jacket facing the first cover body, a receiving hole connected to the receiving groove is provided on the end surface of the jacket facing the second cover body, a partition structure is provided in the receiving groove, a second material passing groove capable of being connected to the receiving hole is provided on the end surface of the second cover body facing the jacket, a second material passing hole connected to the second material passing groove is provided on the end surface of the second cover body away from the jacket, and a blocking structure is provided in the second material passing groove; The sealing structure includes a limiting ring arranged in the accommodating hole and a one-way valve needle and a sealing spring arranged in the second material passing groove, the limiting ring is provided with a through hole, a sealing valve core capable of sealing the through hole is penetrated in the through hole, a channel groove is provided on the end face of the sealing valve core facing the second material passing hole, a channel hole is provided on the side of the sealing valve core, the channel hole is connected with the channel groove, one end of the sealing spring abuts against the one-way valve needle, and the other end of the sealing spring abuts against the sealing valve core, the one-way valve needle can block the channel groove, a gap is left between the one-way valve needle and the inner circumferential surface of the second material passing groove, and a gap is left between the inner circumferential surface of the accommodating hole / the inner circumferential surface of the through hole and the sealing valve core; when the sealing valve core abuts against the limiting ring, the channel hole is located in the accommodating groove.

[0007] By adopting the above technical solution, when the pressure instrument connected to the pressure gauge joint leaks, the pressure on the side of the pressure gauge joint close to the pressure instrument decreases. Due to the pressure difference, the medium in the medium device to be measured / the medium pipeline to be measured drives the plugging valve core to move, so that the plugging valve core abuts against the limit ring, so that the plugging valve core preliminarily blocks the through hole. The guide valve needle also moves toward the limit ring under the action of the pressure difference, and the guide valve blocks the channel groove so that the medium no longer enters the accommodating groove, thereby completely closing the leakage channel and achieving the effect of preventing the joint from leaking. In the process of the one-way valve blocking the plugging valve core, the plugging spring is compressed and deformed. After the leakage problem of the pressure instrument is solved, the plugging spring resets and drives the one-way valve core to move toward the second material through hole, so that the accommodating chamber is connected with the second feed groove through the channel hole and the channel groove, so that the pressure of the accommodating chamber is balanced with the pressure in the second feed groove, and the bellows is installed to reset and drive the plugging valve core to move toward the second material through hole, so that the plugging valve core no longer blocks the through hole, and the communication between the accommodating chamber and the second feed groove is restored to normal.

[0008] Optionally, the one-way valve needle comprises a mounting post, and a top pin having a tapered portion is arranged on the end surface of the mounting post facing the blocking spring.

[0009] By adopting the above technical solution, after the blocking valve core abuts against the limit ring, when the medium continues to enter the second material channel, the one-way valve needle is driven to move toward the blocking valve core, so that the ejector pin is inserted into the channel groove; the setting of the ejector pin has a guiding effect, so that the ejector pin can accurately block the channel groove.

[0010] Optionally, the blocking spring is sleeved outside the ejector pin.

[0011] By adopting the above technical solution, the push pin has a limiting effect on the blocking spring, and plays a limiting role when the blocking spring is compressed or reset.

[0012] Optionally, a first chamfer is provided on the limiting ring, and the first chamfer slope is arranged at the junction of the end surface of the limiting ring facing the second material passing hole and the inner circumferential surface of the limiting ring.

[0013] By adopting the above technical solution, the blocking valve core moves toward the end face away from the second material passage. When the blocking valve core collides with the first chamfered surface, the first chamfered surface guides the blocking valve core, so that the blocking valve core can accurately block the through hole.

[0014] Optionally, the sealing valve core includes an operating rod passed through the through hole, an operating shaft is provided on the end face of the operating rod away from the second material passing hole, a retaining ring groove is opened on the outside of the operating shaft, a retaining spring is provided in the retaining ring groove, a valve core spring is provided on the outer sleeve of the operating shaft, a valve core sleeve is provided on the outer sleeve of the valve core spring, a valve core ring is provided on the inner circumference of the valve core sleeve, the valve core ring is located on the side of the operating rod facing the operating shaft, the valve core spring is in a compressed state, one end of the valve core spring abuts against the valve core ring, and the other end of the valve core spring abuts against the retaining spring.

[0015] By adopting the above technical scheme, the operating shaft limits the valve core spring radially along the operating shaft; the assembly of the sealing valve core, valve core spring and valve core sleeve makes the retaining spring pressed into the retaining ring groove, and the valve core ring cooperates with the retaining spring to limit the axial line of the valve core spring, so that the valve core spring is not easily separated from the operating shaft, thereby realizing the downward freedom of the sealing valve core.

[0016] Optionally, the partition structure includes a fixing ring arranged on the inner circumferential surface of the accommodating groove and an installation ring and a partition bellows arranged in the accommodating groove. A partition cover is passed through the fixing ring, and the outer circumferential surface of the partition cover is in contact with the inner wall of the fixing ring. The installation ring is located and fixed on the side away from the bottom wall of the accommodating groove. One end of the partition bellows is connected to the installation ring, and the other end of the partition bellows is connected to the partition cover.

[0017] By adopting the above technical solution, the interior of the accommodating tank is divided into a plurality of chambers by the dividing cover and the dividing bellows.

[0018] Optionally, a positioning ring block is provided on the outer circumferential surface of the mounting ring, and a positioning ring groove capable of being inserted into the positioning ring block is formed on the inner wall of the accommodating groove.

[0019] By adopting the above technical solution, when the positioning ring block and the positioning ring groove collide with the inner wall of the bottom wall of the accommodating groove, the mounting ring is restricted from continuing to move toward the bottom wall of the accommodating groove, thereby playing a limiting role.

[0020] Optionally, a first sealing ring groove is formed on a side of the positioning ring block facing the first cover body, and a first sealing ring that can abut against the first cover body is arranged in the first sealing ring groove. When the first cover body is connected to the outer sleeve, the mounting ring and / or the positioning ring block abuts against the first cover body.

[0021] By adopting the above technical solution, the first cover body is installed on the outer sleeve, and the positioning ring block contacts the first cover body, so that the first cover body and the inner wall of the positioning ring groove cooperate to limit the positioning ring block, so that the positioning ring block is not easy to move in the accommodating groove; in addition, the first sealing ring can improve the sealing between the first cover body and the outer sleeve to prevent leakage of the medium in the partition bellows.

[0022] Optionally, a storage chamber is formed between the partition bellows, the positioning ring block, the first cover body, and the partition cover, and the storage chamber is filled with antifreeze liquid.

[0023] By adopting the above technical scheme, in a low-temperature environment, the antifreeze in the storage chamber is used to prevent the pressure instrument from freezing and protect the pressure instrument; the volume of the measured medium in the accommodating chamber increases when it freezes at low temperature, and moves upward, driving the bellows valve core assembly to move upward, releasing excess space into the storage chamber, thereby providing sufficient space to prevent freezing and cracking. When the temperature rises, the liquid medium is discharged through the guide hole, and the bellows valve core assembly is reset.

[0024] Optionally, an operating groove is formed on the end surface of the partition cover facing the bottom wall of the accommodating groove, and a bellows valve core assembly is arranged on the sealing valve core, and the bellows valve core assembly includes an installation bellows and an installation disk arranged in the operating groove, and an end surface of the installation disk away from the bottom wall of the operating groove is formed with a groove for inserting a valve core sleeve, one side of the installation bellows is connected to the bottom wall of the operating groove, and the other end of the installation bellows is connected to the installation disk, and an operating hole connected to the interior of the installation bellows is formed on the end surface of the partition cover away from the bottom wall of the accommodating groove, and a guide rod is provided on the end surface of the installation disk away from the valve core sleeve, and an operating disk is arranged in the operating hole, and a punching hole and a guide hole for the guide rod to pass through are formed on the operating disk.

[0025] By adopting the above technical scheme, the installation of the bellows and the installation disk plays a separating role, making it difficult for the accommodating chamber and the storage chamber to be connected; the setting of the operating disk and the guide rod plays a guiding role in the movement of the installation disk along the axial direction of the guide rod; the medium will enter the accommodating space, and when the impurities in the medium adhere to the installation bellows, as the pressure in the medium equipment to be tested / the medium pipeline to be tested changes, the compression and reset action on the bellows is realized, which can loosen the impurities adhered to the installation bellows and improve the service life of the installation bellows. When the pressure in the pipeline / equipment connected to the second cover body increases instantly, the medium first pushes the blocking valve core to move, so that the blocking valve core abuts against the limit ring, so that the blocking valve core preliminarily blocks the through hole and cuts off the pressure transmission; the pressure shock generated by the medium that has entered the accommodating chamber acts on the mounting bellows, causing elastic deformation and displacement of the mounting bellows, and the pressure shock on the mounting bellows is released through the elastic deformation and displacement of the mounting bellows. If the abnormal pressure increases further, the one-way valve needle moves toward the blocking valve core under the action of the medium pressure, so that the ejector pin and the channel groove seal The blockage completely facilitates the passage between the accommodating chamber and the second feed trough, and at the same time the blocking spring is compressed and deformed. When the pressure in the pipeline / equipment returns to normal, the blocking spring resets and drives the one-way valve core to move toward the second through hole, so that the accommodating chamber and the second feed trough are connected through the channel hole and the channel groove, so that the pressure in the accommodating chamber is balanced with the pressure in the second feed trough. The bellows is installed to reset and drive the blocking valve core to move toward the second through hole, so that the blocking valve core no longer blocks the through hole, and the connection between the accommodating chamber and the second feed trough is restored to normal, which solves the hidden danger of damage to the pressure instrument due to excessive pressure shock.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. When the pressure instrument connected to the pressure gauge joint leaks, the pressure on the side of the pressure gauge joint close to the pressure instrument decreases. Due to the pressure difference, the medium in the medium device to be measured / the medium pipeline to be measured drives the plugging valve core to move, so that the plugging valve core abuts against the limit ring, so that the plugging valve core preliminarily blocks the through hole. The guide valve needle also moves toward the limit ring under the action of the pressure difference, and the guide valve blocks the channel groove so that the medium no longer enters the accommodating groove, thereby completely closing the leakage channel and achieving the effect of preventing the joint from leaking. In the process of the one-way valve blocking the plugging valve core, the plugging spring is compressed and deformed. After the leakage problem of the pressure instrument is solved, the plugging spring resets and drives the one-way valve core to move toward the second through hole, so that the accommodating chamber is connected with the second feed groove through the channel hole and the channel groove, so that the pressure in the accommodating chamber is balanced with the pressure in the second feed groove, and the bellows is installed to reset and drive the plugging valve core to move toward the second through hole, so that the plugging valve core no longer blocks the through hole, so that the connection between the accommodating chamber and the second feed groove is restored to normal. 2. Set antifreeze to give the joint an antifreeze effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 It is a schematic diagram of the structure of an embodiment of the present application; Figure 2 It is a schematic diagram of the structure after removing the pressure instrument; Figure 3 is along Figure 2 Sectional view along line AA; Figure 4 It is a schematic diagram of the structure of the coat; Figure 5 It is a schematic diagram highlighting the partition structure; Figure 6 yes Figure 3 Schematic diagram of the enlarged portion B.

[0029] Figure numerals: 1, outer sleeve; 11, accommodating groove; 12, accommodating hole; 13, perforation; 14, positioning ring groove; 2, first cover body; 21, first material passing groove; 22, first material passing hole; 3, second cover body; 31, second material passing groove; 32, second material passing hole; 33, accommodating ring groove; 34, sealing ring block; 4, partition structure; 41, fixing ring; 411, circular hole; 412, partition sealing ring groove; 413, partition sealing ring; 42, partition cover; 421, operating groove; 422, operating hole; 43, mounting ring; 431, first sealing ring groove; 432, first sealing ring; 433, positioning ring block; 434, second sealing ring groove; 435, second Sealing ring; 44, separating bellows; 5, sealing structure; 51, limiting ring; 511, through hole; 52, one-way valve needle; 521, mounting column; 5211, mounting groove; 522, ejector pin; 53, sealing spring; 54, sealing valve core; 541, operating rod; 5411, channel groove; 5412, channel hole; 542, operating ring; 543, operating shaft; 55, valve core spring; 56, valve core sleeve; 561, valve core ring; 57, retaining ring; 58, bellows valve core assembly; 581, mounting bellows; 582, mounting plate; 5821, groove; 583, guide rod; 584, operating plate; 5841, guide hole; 5842, punching hole. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-6 This application is described in further detail.

[0031] This embodiment discloses a freeze-proof and leak-proof pressure gauge connector. Figure 1 and Figure 2 , an antifreeze and anti-leakage pressure gauge joint, comprising an outer jacket 1, a first cover body 2 and a second cover body 3. The outer jacket 1 is arranged between the first cover body 2 and the second cover body 3. The first cover body 2 and the second cover body 3 are both threadedly connected to the outer jacket 1.

[0032] Reference Figure 2 and Figure 3 The end surface of the outer sleeve 1 facing the first cover body 2 is provided with a receiving groove 11. The end surface of the outer sleeve 1 away from the first cover body 2 is provided with a receiving hole 12, and the receiving hole 12 is connected with the receiving groove 11. The inner circumferential surface of the receiving groove 11 is provided with a positioning ring groove 14, and the positioning ring groove 14 penetrates the outer sleeve 1 toward the end surface away from the bottom wall of the receiving groove 11.

[0033] Reference Figure 2 and Figure 3 The outer circumferential surface of the outer sleeve 1 is provided with four through holes 13 , which are distributed in an array around the axis of the outer sleeve 1 . The through holes 13 are communicated with the receiving groove 11 .

[0034] Reference Figure 1 and Figure 3 The first cover body 2 is provided with a first material passage 21 on the end surface away from the outer sleeve 1. The bottom wall of the first material passage 21 is provided with a first material passage hole 22, which can be connected to the first containing groove 11. A pressure instrument can be installed on the first cover body 2.

[0035] Reference Figure 2 and Figure 3 The second cover 3 is provided with a second material passage groove 31 on the end surface facing the outer sleeve 1, and the second material passage groove 31 can be connected with the accommodating hole 12. The bottom wall of the second material passage groove 31 is provided with a second material passage hole 32. The second cover 3 is provided with an accommodating ring groove 33 on the end surface facing the outer sleeve 1, and a sealing ring block 34 is arranged in the accommodating ring groove 33. When the second cover 3 is connected to the outer sleeve 1 by threads, the sealing ring block 34 is in contact with the outer sleeve 1. The second cover 3 can be installed on the medium pipeline to be measured or the medium equipment to be measured.

[0036] Reference Figure 3 and Figure 4 The outer sleeve 1 is provided with a partition structure 4, which is used to partition the accommodating groove 11 into a plurality of chambers. The partition structure 4 includes a fixing ring 41, a partition cover 42, a mounting ring 43 and a partition bellows 44.

[0037] Reference Figure 3 and Figure 4The outer circumference of the fixing ring 41 is fixedly connected to the inner circumference of the accommodating groove 11, and one end of the fixing ring 41 is fixedly connected to the bottom wall of the accommodating groove 11. A circular hole 411 is formed on the end surface of the fixing ring 41, and a separation sealing ring groove 412 is formed on the inner wall of the circular hole 411, and a separation sealing ring 413 is arranged in the separation sealing ring groove 412.

[0038] Reference Figure 3 and Figure 5 The partition cover 42 is inserted into the circular hole 411, and the outer circumferential surface of the partition cover 42 is in contact with the inner wall of the circular hole 411. When the partition cover 42 is installed in the circular hole 411, the partition sealing ring 413 is in contact with the outer circumferential surface of the partition cover 42. The partition cover 42, the inner circumferential surface of the circular hole 411 and the bottom wall of the containing groove 11 enclose a containing chamber.

[0039] Reference Figure 3 and Figure 5 An operating groove 421 is formed at one end of the partition cover 42 facing the bottom wall of the accommodating groove 11 , and an operating hole 422 is formed at the bottom wall of the operating groove 421 .

[0040] Reference Figure 3 and Figure 5 The mounting ring 43 is disposed in the receiving groove 11 , and the mounting ring 43 is located on a side of the fixing ring 41 away from the bottom wall of the receiving groove 11 .

[0041] Reference Figure 3 The end surface of the mounting ring 43 away from the bottom wall of the accommodating groove 11 is provided with a first sealing ring groove 431, and a first sealing ring 432 is arranged in the first sealing ring groove 431. When the first cover body 2 is connected to the outer sleeve 1, the first sealing ring 432 abuts against the first cover body 2.

[0042] Reference Figure 3 and Figure 5 The outer circumferential surface of the mounting ring 43 is fixedly connected with a positioning ring block 433, and the positioning ring block 433 is inserted into the positioning ring groove 14. When the first cover body 2 and the outer sleeve 1 are in a connected state, the mounting ring 43 and / or the positioning ring block 433 abut against the first cover body 2.

[0043] Reference Figure 3 and Figure 5 The outer circumferential surface of the mounting ring 43 is provided with a second sealing ring groove 434, which is located on the side of the positioning ring block 433 close to the bottom wall of the receiving groove 11. A second sealing ring 435 is arranged in the second sealing ring groove 434, and the second sealing ring 435 abuts against the inner wall of the receiving groove 11.

[0044] Reference Figure 3 and Figure 5One end of the partition bellows 44 is fixedly connected to the positioning ring block 433, and the other end of the partition bellows 44 is fixedly connected to the partition cover 42. The partition bellows 44, the partition cover 42, the mounting ring 43 and the first cover body 2 enclose a storage chamber. Antifreeze is stored in the storage chamber.

[0045] Reference Figure 3 and Figure 6 A blocking structure 5 is provided in the second material passage 31, and the blocking structure 5 can block the accommodating hole 12. The blocking structure 5 includes a limit ring 51, a one-way valve needle 52, a blocking spring 53, a blocking valve core 54, a valve core spring 55, a valve core sleeve 56, a retaining spring 57 and a bellows valve core assembly 58.

[0046] Reference Figure 3 and Figure 6 The one-way valve needle 52 is arranged in the accommodating groove 11, and a gap is left between the one-way valve needle 52 and the inner circumferential surface of the second material passage groove 31. The one-way valve needle 52 includes a mounting column 521 and an ejector pin 522. The outer diameter of the mounting column 521 is smaller than the inner diameter of the second material passage groove 31. The end surface of the mounting column 521 facing the second material passage hole 32 is provided with a mounting groove 5211, and the mounting groove 5211 is communicated with the outer circumferential surface of the mounting column 521. When the mounting column 521 abuts against the bottom wall of the second material passage groove 31, the second material passage hole 32 is communicated with the mounting groove 5211. The ejector pin 522 is fixedly connected to the end surface of the mounting column 521 away from the bottom wall of the accommodating groove 11. The ejector pin 522 has a tapered portion.

[0047] Reference Figure 6 The outer circumferential surface of the limiting ring 51 is fixedly connected to the inner circumferential surface of the accommodating hole 12. A through hole 511 is provided on the end surface of the limiting ring 51. A first chamfer is provided on the limiting ring 51, and the first chamfer slope is provided at the junction of the end surface of the limiting ring 51 facing the second material passing hole 32 and the inner circumferential surface of the limiting ring 51.

[0048] Reference Figure 3 and Figure 6 The plugging valve core 54 includes an operating rod 541, an operating ring 542 and an operating shaft 543. The operating rod 541 is inserted into the through hole 511, and the outer diameter of the operating rod 541 is smaller than the inner diameter of the through hole 511, and a gap is left between the operating rod 541 and the inner circumferential surface of the through hole 511. A channel groove 5411 is provided on the end surface of the operating rod 541 facing the second material passage hole 32. A channel hole 5412 is provided on the outer circumferential surface of the operating rod 541, and the channel hole 5412 is connected to the channel groove 5411. The channel groove 5411 can be inserted into the tapered portion.

[0049] Reference Figure 6The operating ring 542 is fixedly connected to the outer circumference of the operating rod 541, and the operating ring 542 is located on the side of the limiting ring 51 facing the second material passage hole 32. The outer diameter of the operating ring 542 is larger than the inner diameter of the through hole 511, and the outer diameter of the operating ring 542 is smaller than the inner diameter of the accommodating hole 12. There is a gap between the operating ring 542 and the inner circumference of the accommodating hole 12. Reference Figure 6 The operating ring 542 is provided with a second chamfer, and the second chamfer slope is provided at the junction of the end face of the operating ring 542 facing the limiting ring 51 and the outer circumferential surface of the operating ring 542. When the blocking valve core 54 moves away from the second material passage hole 32, when the operating ring 542 abuts against the limiting ring 51, the first chamfer slope is fitted with the second chamfer slope, and the operating hole 422 is located in the receiving groove 11. With the help of the operating groove 421 and the operating hole 422, the medium in the receiving groove 11 can flow with the medium in the second material passage groove 31.

[0050] Reference Figure 6 The operating shaft 543 is fixedly connected to the side of the operating rod 541 away from the second material passage hole 32. A snap ring groove is formed on the outer circumferential surface of the operating shaft 543. The snap ring 57 is snapped into the snap ring groove.

[0051] Reference Figure 6 The valve core sleeve 56 is sleeved outside the operating shaft 543, and the inner circumferential surface of the valve core sleeve 56 is fixedly connected with a valve core ring 561. The valve core ring 561 is located on the side of the operating rod 541 facing the operating shaft 543.

[0052] Reference Figure 6 The valve core spring 55 is sleeved outside the operating shaft 543. The valve core spring 55 is in a compressed state, one end of the valve core spring 55 abuts against the valve core ring 561, and the other end of the valve core spring 55 abuts against the clamping spring 57.

[0053] Reference Figure 6 The blocking spring 53 is sleeved outside the ejector pin 522. One end of the blocking spring 53 can abut against the mounting post 521, and the other end of the blocking spring 53 can abut against the operating ring 542 / operating rod 541.

[0054] Reference Figure 6 The bellows valve core assembly 58 includes a mounting bellows 581 and a mounting plate 582. The mounting plate 582 and the mounting bellows 581 are both arranged in the operating groove 421, and the end surface of the mounting plate 582 away from the bottom wall of the operating groove 421 is provided with a groove 5821, and the valve core sleeve 56 is inserted into the groove 5821.

[0055] Reference Figure 5 and Figure 6The end surface of the mounting plate 582 away from the valve core sleeve 56 is fixedly connected with a guide rod 583. An operating plate 584 is fixedly connected in the operating hole 422, and a guide hole 5841 and a punching hole 5842 are opened on the operating plate 584. The guide hole 5841 and the punching hole 5842 both connect the interior of the mounting bellows 581 with the interior of the partition bellows 44. The guide hole 5841 can allow the guide rod 583 to pass through.

[0056] Reference Figure 5 and Figure 6 One end of the mounting bellows 581 is connected to the mounting plate 582 , and the other end of the mounting bellows 581 is fixedly connected to the bottom wall of the operating slot 421 . The interior of the mounting bellows 581 is communicated with the operating hole 422 .

[0057] The implementation principle of the antifreeze and anti-leakage pressure gauge connector of the embodiment of the present application is: when any component at the pressure instrument end leaks, the pressure in the storage chamber is lower than the pressure in the accommodating chamber. Due to the pressure difference, the blocking valve core 54 moves upward and blocks the through hole 511, and the storage chamber is connected to the accommodating hole 12 through the channel groove 5411 and the channel hole 5412. As the pressure in the storage chamber further decreases, the one-way valve needle 52 moves toward the blocking valve core 54 under the force of the pressure difference, so that the ejector pin 522 blocks the channel groove 5411, completely closing the leakage channel.

[0058] Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The words "first", "second", "third" and similar words used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "One" or "one" and similar words do not indicate a quantitative limit, but indicate that there is at least one. "Include" or "comprise" and similar words mean that the elements or objects appearing before "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0059] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the design concept of the present application should be included in the protection scope of the present application.

Claims

1. A freeze-proof and leak-proof pressure gauge connector, comprising a jacket (1), characterized in that: A first cover body (2) is provided on one side of the outer sleeve (1), and a pressure instrument can be installed on the first cover body (2); a second cover body (3) is provided on the other side of the outer sleeve (1); a receiving groove (11) is provided on the end surface of the outer sleeve (1) facing the first cover body (2); a receiving hole (12) communicating with the receiving groove (11) is provided on the end surface of the outer sleeve (1) facing the second cover body (3); a partition structure (4) is provided in the receiving groove (11); a second material passing groove (31) capable of communicating with the receiving hole (12) is provided on the end surface of the second cover body (3) facing the outer sleeve (1); a second material passing hole (32) communicating with the second material passing groove (31) is provided on the end surface of the second cover body (3) away from the outer sleeve (1); a blocking structure (5) is provided in the second material passing groove (31); The blocking structure (5) comprises a limit ring (51) arranged in the accommodating hole (12) and a one-way valve needle (52) and a blocking spring (53) arranged in the second material passage groove (31); the limit ring (51) is provided with a through hole (511); a blocking valve core (54) capable of blocking the through hole (511) is inserted into the through hole (511); a channel groove (5411) is provided on the end surface of the blocking valve core (54) facing the second material passage hole (32); a channel hole (5412) is provided on the side surface of the blocking valve core (54); the channel hole (5412) and the channel groove (511) are connected to each other. 411), one end of the blocking spring (53) abuts against the one-way valve needle (52), and the other end of the blocking spring (53) abuts against the blocking valve core (54). The one-way valve needle (52) can block the channel groove (5411), and a gap is left between the one-way valve needle (52) and the inner circumferential surface of the second material passage groove (31), and a gap is left between the inner circumferential surface of the accommodating hole (12) / the inner circumferential surface of the through hole (511) and the blocking valve core (54); when the blocking valve core (54) abuts against the limit ring (51), the channel hole (5412) is located in the accommodating groove (11).

2. The antifreeze and leak-proof pressure gauge joint according to claim 1, characterized in that: The one-way valve needle (52) comprises a mounting column (521), and a top needle (522) having a tapered portion is arranged on the end surface of the mounting column (521) facing the blocking spring (53).

3. The antifreeze and leak-proof pressure gauge joint according to claim 2, characterized in that: The blocking spring (53) is sleeved outside the ejector pin (522).

4. The antifreeze and leak-proof pressure gauge joint according to claim 1, characterized in that: The limiting ring (51) is provided with a first chamfer, and the first chamfer slope is arranged at the junction of the end surface of the limiting ring (51) facing the second material passage hole (32) and the inner circumferential surface of the limiting ring (51).

5. The antifreeze and leak-proof pressure gauge joint according to claim 1, characterized in that: The blocking valve core (54) comprises an operating rod (541) inserted into the through hole (511); an operating shaft (543) is arranged on the end face of the operating rod (541) away from the second material passage hole (32); a retaining ring groove is provided on the outside of the operating shaft (543); a retaining spring (57) is arranged in the retaining ring groove; a valve core spring (55) is arranged on the outer sleeve of the operating shaft (543); a valve core sleeve (56) is arranged on the outer sleeve (1) of the valve core spring (55); a valve core ring (561) is arranged on the inner circumferential surface of the valve core sleeve (56); the valve core ring (561) is located on the side of the operating rod (541) facing the operating shaft (543); the valve core spring (55) is in a compressed state; one end of the valve core spring (55) abuts against the valve core ring (561); and the other end of the valve core spring (55) abuts against the retaining spring (57).

6. The antifreeze and leak-proof pressure gauge joint according to claim 5, characterized in that: The partition structure (4) comprises a fixing ring (41) arranged on the inner circumferential surface of the accommodating groove (11), a mounting ring (43) and a partition bellows (44) arranged in the accommodating groove (11); a partition cover (42) is passed through the fixing ring (41); the outer circumferential surface of the partition cover (42) is in contact with the inner wall of the fixing ring (41); the mounting ring (43) is located on a side fixed away from the bottom wall of the accommodating groove (11); one end of the partition bellows (44) is connected to the mounting ring (43); and the other end of the partition bellows (44) is connected to the partition cover (42).

7. The antifreeze and leak-proof pressure gauge joint according to claim 6, characterized in that: The outer circumferential surface of the mounting ring (43) is provided with a positioning ring block (433), and the inner wall of the accommodating groove (11) is provided with a positioning ring groove (14) capable of inserting the positioning ring block (433).

8. The antifreeze and leak-proof pressure gauge joint according to claim 7, characterized in that: The positioning ring block (433) is provided with a first sealing ring groove (431) on one side facing the first cover body (2), and a first sealing ring (432) capable of abutting against the first cover body (2) is provided in the first sealing ring groove (431); when the first cover body (2) is connected to the outer sleeve (1), the mounting ring (43) and / or the positioning ring block (433) abut against the first cover body (2).

9. The antifreeze and leak-proof pressure gauge joint according to claim 8, characterized in that: The interior of the partition bellows (44), the positioning ring block (433), the first cover body (2), and the partition cover (42) form a storage chamber, and the storage chamber is filled with antifreeze liquid.

10. The antifreeze and leak-proof pressure gauge joint according to claim 6, characterized in that: The partition cover (42) is provided with an operating groove (421) on the end surface facing the bottom wall of the accommodating groove (11); the blocking valve core (54) is provided with a bellows valve core assembly (58); the bellows valve core assembly (58) comprises an installation bellows (581) and an installation plate (582) arranged in the operating groove (421); the installation plate (582) is provided with a groove (5821) capable of inserting the valve core sleeve (56) on the end surface away from the bottom wall of the operating groove (421); one side of the installation bellows (581) is connected to the bottom wall of the operating groove (421). The mounting bellows (581) is connected to the wall, the other end of the mounting bellows (581) is connected to the mounting plate (582), the end surface of the partition cover (42) away from the bottom wall of the accommodating groove (11) is provided with an operating hole (422) connected to the interior of the mounting bellows (581), the end surface of the mounting plate (582) away from the valve core sleeve (56) is provided with a guide rod (583), an operating plate (584) is provided in the operating hole (422), and a punching hole (5842) and a guide hole (5841) for the guide rod (583) to pass through are provided on the operating plate (584).

Images