Sealing structure and sealing detection method

Abstract

The invention relates to a sealing structure and a sealing detection method. The sealing structure comprises a shell, a first sealing element and a sliding part, the first sealing element is arranged in the shell, so that a joint sealing cavity is formed in the shell, the first sealing element has a first form and a second form, and the minimum radial size of the joint sealing cavity when the first sealing element is in the second form is smaller than that of the joint sealing cavity when the first sealing element is in the first form; the sliding part is provided with a flow channel communicated with the exterior of the sealing structure and the connector sealing cavity, the sliding part is arranged in the shell in a sliding mode so as to adjust the form of the first sealing element, and when the first sealing element is in the second form, the sliding part abuts against the axial end face of the first sealing element. According to the sealing structure, rapid sealing installation and detachment of the sealing structure on the connector can be achieved, and the testing or production efficiency is improved; and in the whole dismounting and mounting process, the situation that the joint of the plastic plug and the pagoda connector is deformed and loosened due to frequent use of the plastic plug is avoided.

Description

Technical Field

[0001] The present application relates to the field of sealing technology, and in particular to a sealing structure and a sealing detection method. Background Art

[0002] Connectors with a conical pagoda-shaped external appearance (referred to as "pagoda connectors") are widely used in medical and industrial fields due to their advantages such as easy disassembly and assembly and reliable performance. For example, they are used in two-way / three-way connectors, arteriovenous catheters, blood pumps, dialysis pumps and other surgical instruments.

[0003] In order to verify the overall sealing effect of products equipped with pagoda joints, the interior of the product can be filled with liquid or gas according to different working conditions of the product, and the interface of the pagoda joint can be sealed with a plastic plug. However, for different scenarios required for testing and production, such as verifying pressure resistance tests and product sealing inspections, the plastic plug needs to be frequently disassembled and assembled, which is very laborious and time-consuming. In some scenarios, the plastic plug needs to seal the interface of the pagoda joint for a long time, which causes the connection with the pagoda joint to deform and loosen, resulting in poor durability of the plastic plug. Summary of the invention

[0004] Based on this, it is necessary to provide a sealing structure and a sealing detection method to address the above technical problems.

[0005] A sealing structure comprises: a housing, a first sealing element and a sliding member;

[0006] The first sealing element is arranged in the housing so that a joint sealing cavity is formed inside the housing, the first sealing element has a first form and a second form, and the minimum radial dimension D1 of the joint sealing cavity when the first sealing element is in the second form is smaller than the minimum radial dimension D2 of the joint sealing cavity when the first sealing element is in the first form;

[0007] The sliding member has a flow channel communicating with the outside of the sealing structure and the joint sealing cavity. The sliding member can be slidably arranged in the shell to adjust the shape of the first sealing element, wherein when the first sealing element is in the second shape, the sliding member is pressed against the axial end face of the first sealing element.

[0008] In one of the embodiments, the sealing structure further comprises a handle movably disposed on the shell, and when the handle moves, it can drive the sliding member to slide in the shell to adjust the shape of the first sealing element.

[0009] In one embodiment, the handle is rotatably disposed on the housing, or the handle is axially slidably disposed on the housing.

[0010] In one embodiment, one end of the handle close to the sliding member is hinged to the housing through a rotating shaft, the handle has a first action surface and a second action surface, the distance between the first action surface and the rotating shaft is smaller than the distance between the second action surface and the rotating shaft, and the first action surface and the second action surface respectively abut against the sliding member as the handle rotates;

[0011] When the first action surface abuts against the sliding member, the first sealing element is switched to the first form; when the second action surface abuts against the sliding member, the first sealing element is switched to the second form.

[0012] In one of the embodiments, an escape opening is provided on the housing, and one end of the handle close to the sliding member is exposed at the escape opening.

[0013] In one embodiment, the first sealing element is made of elastic material and its original shape is the first shape, and the axial length of the first sealing element in the first shape is greater than the axial length in the second shape;

[0014] The sealing structure further comprises an elastic member arranged on the sliding member, and the elastic member is used for providing a force for the sliding member to slide in a direction away from the first sealing element, so as to avoid resetting of the first sealing element.

[0015] In one embodiment, the sliding member includes a nested driven slider and an active slider; the end surface of the driven slider away from the handle is connected to the first sealing element; the active slider can slide under the drive of the handle, and when it slides to abut against the driven slider, it can drive the driven slider to slide together until the first sealing element switches from the first state to the second state;

[0016] Wherein, the elastic member is arranged between the driven slider and the active slider.

[0017] In one embodiment, the driven slider includes a small diameter section and a large diameter section coaxially connected, the outer diameter of the small diameter section is smaller than the outer diameter of the large diameter section, the small diameter section is arranged in the active slider, the large diameter section is used to connect with the first sealing element, and the elastic member is located in the active slider and abuts against the end face of the small diameter section away from the first sealing element.

[0018] In one embodiment, a second sealing element is provided between the outer wall of the small diameter section and the inner wall of the active slider, and / or a third sealing element is provided between the outer wall of the large diameter section and the inner wall of the housing.

[0019] In one embodiment, when the first sealing element is in the first state, the outer shape is cylindrical, and when the first sealing element is in the second state, the side curved surface is bent inward;

[0020] And / or, the first sealing element is in the shape of a bellows, wherein when the first sealing element is in the first form, the depth of the recessed portion of the first sealing element is recorded as H1, and when the first sealing element is in the second form, the depth of the recessed portion of the first sealing element is recorded as H2, H2>H1.

[0021] In one of the embodiments, the sliding member has a flow channel, an inlet of the flow channel is communicated with the outside of the sealing structure, and an outlet of the flow channel is communicated with the joint sealing cavity.

[0022] In one of the embodiments, the sealing structure further includes a fourth sealing element, which is disposed on an end of the sliding member close to the first sealing element, and the fourth sealing element is opposite to the joint sealing cavity.

[0023] In one of the embodiments, the sealing structure further includes a joint positioning member, which is disposed in the housing and connected to an end of the first sealing element away from the sliding member.

[0024] In one of the embodiments, the sealing structure is used to detect the sealing performance of an object connected to a pagoda connector, and the connector sealing cavity is used to receive one end of the pagoda connector.

[0025] A sealing detection method comprises the following steps:

[0026] adjusting a first sealing element of the sealing structure to a first shape;

[0027] Inserting one end of the connector of the target object into the connector sealing cavity of the sealing structure;

[0028] driving the sliding member of the sealing structure to slide until the first sealing element switches from the first state to the second state;

[0029] Fluid is injected into the joint through the flow channel of the sliding member, and a sealing effect test is performed on the target object.

[0030] The above-mentioned sealing structure and sealing detection method can be used to test the sealing effect of products equipped with pagoda connectors. In the sealing structure and sealing detection system, the sliding member can adjust the shape of the first sealing element by sliding in the shell, thereby changing the minimum radial dimension of the joint sealing cavity, so that the wall of the first sealing element is in close contact with or released from the port of the pagoda connector, thereby realizing the rapid sealing installation and removal of the joint by the sealing structure, and improving the testing or production efficiency. Moreover, during the entire disassembly and assembly process, deformation and loosening of the connection with the pagoda connector caused by frequent use of the plastic plug is avoided, thereby ensuring the long-term durability of the sealing structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A cross-sectional view of a sealing structure equipped with a pagoda joint provided in an embodiment of the present application when the first sealing element is in a first form.

[0032] Figure 2 for Figure 1 A partial cross-sectional view of a sealing structure is provided when the first sealing element is in a second state.

[0033] Figure 3 A front view of a pagoda joint provided in an embodiment of the present application.

[0034] Figure 4 A schematic diagram of the partial structure of another first sealing element provided in an embodiment of the present application when in a second form.

[0035] Figure 5 Another sealing structure equipped with a pagoda joint provided in the embodiment of the present application is Figure 2 A cross-sectional view of the first sealing element is shown in a first configuration.

[0036] Figure 6 for Figure 5 A partial cross-sectional view of a sealing structure is provided when the first sealing element is in a second state.

[0037] Figure 7 A cross-sectional view of an active slider provided in an embodiment of the present application.

[0038] Figure 8 A schematic diagram of the three-dimensional structure of a sealing structure equipped with a pagoda joint provided in an embodiment of the present application when the first sealing element is in a first form.

[0039] Fig. 9 for Figure 8 A cross-sectional view of a sealing structure is provided when a first sealing element is in a first configuration.

[0040] Fig.10 for Figure 8A cross-sectional view of a sealing structure is provided when the first sealing element is in a second configuration.

[0041] Fig.11 A schematic diagram of the three-dimensional structure of a sealing structure equipped with a pagoda joint provided in an embodiment of the present application when the first sealing element is in a first form.

[0042] Fig.12 A schematic diagram of the three-dimensional structure of another sealing structure equipped with a pagoda joint provided in an embodiment of the present application when the first sealing element is in a first form.

[0043] Fig.13 for Fig.12 A partial cross-sectional view of a sealing structure is provided when the first sealing element is in a second state.

[0044] The reference numerals in the accompanying drawings are described as follows:

[0045] 10. Sealing structure; 100. Shell; 100a. Joint sealing cavity; 100b. Avoidance opening; 210. First sealing element; 220. Second sealing element; 230. Third sealing element; 240. Fourth sealing element; 300. Sliding member; 300a. Flow channel; 310. Active slider; 320. Driven slider; 321. Small diameter section; 322. Large diameter section; 400. Handle; 410. Rotating shaft; 400a. First action surface; 400b. Second action surface; 500. Elastic member; 600. Joint positioning member; 20. Pagoda joint; 20a. Conical port. DETAILED DESCRIPTION

[0046] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0047] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply 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 a limitation on the present application.

[0048] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0049] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0050] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0051] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0052] See also Figure 1 and Figure 2, this embodiment provides a sealing structure 10. The sealing structure 10 includes: a housing 100, a first sealing element 210 and a sliding member 300; the first sealing element 210 is arranged in the housing 100 so that a joint sealing cavity 100a is formed inside the housing 100, the first sealing element 210 has a first form and a second form, and the minimum radial dimension D1 of the joint sealing cavity 100a when the first sealing element 210 is in the second form is smaller than the minimum radial dimension D2 of the joint sealing cavity 100a when the first sealing element 210 is in the first form; the sliding member 300 is slidably arranged in the housing 100 to adjust the form of the first sealing element 210, wherein when the first sealing element 210 is in the second form, the sliding member 300 is pressed against the axial end face of the first sealing element 210.

[0053] The sealing structure 10 of the present application can be used to test the sealing performance of an object connected to a pagoda connector 20 (for example, a two-way / three-way connector, an arteriovenous catheter, a blood pump, a dialysis pump, or other surgical instruments, or corresponding industrial products), and the connector sealing cavity 100a is used to receive one end of the pagoda connector 20.

[0054] like Figure 3 As shown, the pagoda connector 20 may include a tube body 20b and tapered ports 20a disposed at both axial ends of the tube body 20b. The tube body 20b of the pagoda connector 20 may be provided with fluid access ports according to the requirements. Before verifying the sealing effect of a product equipped with the pagoda connector 20, one tapered port 20a of the pagoda connector 20 may be installed on the product, and the other tapered port 20a may be installed in the connector sealing cavity 100a of the housing 100, at which time the first sealing element 210 is in the first form.

[0055] After the sealing structure 10 is assembled on the pagoda joint 20, the first sealing element 210 can be adjusted to the second form by sliding the sliding member 300 in the housing 100. When the first sealing element 210 is in the second form, the minimum radial dimension D1 of the joint sealing cavity 100a of the first sealing element 210 becomes smaller than the minimum radial dimension D2 of the joint sealing cavity 100a when the first sealing element 210 is in the first form, so that the cavity wall of the joint sealing cavity 100a is tightly attached to the tapered port 20a of the pagoda joint 20. At this time, the axial end face of the first sealing element 210 is also pressed against the sliding member 300, so that the first sealing element 210, the pagoda joint 20, and the sliding member 300 are sealed. Afterwards, fluid (such as liquid or gas) is injected into the pagoda joint 20 to test the sealing effect of the product equipped with the pagoda joint 20. During the test, due to the seal between the first sealing element 210 and the pagoda joint 20 and the sliding part 300, the fluid in the pagoda joint 20 will not leak.

[0056] After completing the sealing effect test of the product equipped with the pagoda joint 20, the sliding part 300 is slid outward in the shell 100, and the first sealing element 210 is restored and adjusted to the first form. At this time, the minimum radial dimension of the joint sealing cavity 100a of the first sealing element 210 becomes larger, and the cavity wall of the joint sealing cavity 100a is no longer tightly attached to or pressed against the tapered port 20a of the pagoda joint 20, so that the sealing structure 10 and the pagoda structure 20 become loose, and then the sealing structure 10 can be removed from the product equipped with the pagoda joint 20.

[0057] The sealing structure 10 provided in this embodiment can be used to test the sealing effect of products equipped with pagoda connectors 20. In the sealing structure 10, the sliding member 300 can adjust the shape of the first sealing element 210 by sliding in the housing 100, thereby changing the minimum radial dimension of the joint sealing cavity 100a, so that the wall of the first sealing element 210 is in close contact with or released from the port of the pagoda connector 20, thereby realizing the rapid sealing installation and removal of the joint by the sealing structure 10, and improving the testing or production efficiency. Moreover, during the entire disassembly and assembly process, deformation and loosening of the connection with the pagoda connector 20 caused by frequent use of the plastic plug is avoided, thereby ensuring the long-term durability of the sealing structure 10.

[0058] In this embodiment, the housing 100 is made of metal material, such as stainless steel. The metal housing 100 has certain strength and hardness, and can protect the internal components of the sealing structure 10. The outer shape of the housing 100 can be cylindrical or polyhedral.

[0059] It can be understood that the housing 100 has an inner cavity for the first sealing element 210 to be installed and for the sliding member 300 to slide.

[0060] In this embodiment, see Figure 1 The sliding member 300 has a flow channel 300a, which is connected to the outside of the sealing structure 10 and the joint sealing cavity 100a, that is, the inlet of the flow channel 300a is connected to the outside of the sealing structure 10, and the outlet of the flow channel 300a is connected to the joint sealing cavity 100a. Fluid (such as gas or liquid) can flow from one port of the pagoda joint 20 to the product installed at the other port of the pagoda head 20 through the flow channel 300a, so as to test and observe the sealing effect of the product.

[0061] In this embodiment, when the first sealing element 210 is in the first state, the outer appearance is Figure 1 The cylindrical shape shown; see Figure 2 When the first sealing element 210 is in the second state, the side curved surface bends inward to seal against the outer wall of the pagoda head. The first sealing element 210 has a simple structure, such as being made of elastic material, and can also be switched between the first state and the second state.

[0062] Of course, in some other embodiments, the first sealing element 210 may have an external appearance when in the first state and the second state. Figure 4 The bellows shown. Figure 4 When the shape of the first sealing element 210 changes, the depression depth H of the depression part of the first sealing element 210 and the distance L between two adjacent depression parts will also change accordingly. Specifically, when the first sealing element 210 is in the first shape, the depression depth of the depression part of the first sealing element 210 is recorded as H1, and the distance between two adjacent depression parts is recorded as L1; when the first sealing element 210 is in the second shape, the depression depth of the depression part of the first sealing element 210 is recorded as H2, and the distance between two adjacent depression parts is recorded as L2, H2>H1, L2<L1.

[0063] In some embodiments of the present application, see Figure 5 and Figure 6 The sealing structure 10 further includes a handle 400 movably disposed on the housing 100. When the handle 400 moves, the sliding member 300 can be driven to slide in the housing 100 to adjust the shape of the first sealing element 210, that is, the first sealing element 210 switches between the first shape and the second shape. The handle 400 can move between a first position and a second position, wherein when the handle 400 moves to the first position, the first sealing element 210 is in the first shape; when the handle 400 moves to the second position, the first sealing element 210 is in the second shape. When the handle 400 moves between the first position and the second position, the first sealing element 210 can switch between the first shape and the second shape. By manipulating the handle 400, the shape of the first sealing element 210 is indirectly adjusted, thereby improving the convenience of operation.

[0064] The handle 400 may be made of metal material (such as stainless steel) or wear-resistant plastic material.

[0065] The first sealing element 210 is made of elastic material and its original form is the first form. The axial length of the first sealing element 210 in the first form is greater than the axial length in the second form; see Figure 5 and Figure 6The sealing structure 10 further includes an elastic member 500 disposed on the sliding member 300, and the elastic member 500 is used to provide a force for sliding the sliding member 300 in a direction away from the first sealing element 210, so as to avoid the reset of the first sealing element 210. The first sealing element 210 made of elastic material is in the second state when subjected to an external force; when the external force is removed, the first sealing element 210 is reset and switched from the second state to the first state. This characteristic of the first sealing element 210 can be utilized. After the sealing effect test of the product equipped with the pagoda joint 20 is completed, the external force on the handle 400 is removed or the handle 400 is moved from the second position to the first position, the elastic member 500 is reset and drives the sliding member 300 to move in a direction away from the first sealing element 210, thereby providing a certain avoidance space for the reset of the first sealing element 210, and the first sealing element 210 is reset and switched from the second state to the first state.

[0066] After completing the sealing effect test of the product equipped with the pagoda connector 20, the elastic part 500 can be used in conjunction with the first sealing element 210 of the elastic material to reset the components in the shell 100 one by one, so as to facilitate the sealing effect test of the next batch of products equipped with the pagoda connector 20.

[0067] The elastic member 500 may be a compression spring. When the first sealing element 210 is in the second state, the elastic member 500 is in a compressed state.

[0068] In order to not affect the cooperation between the sliding member 300 and the first sealing element 210, and to ensure that the elastic member 500 can effectively provide the sliding member 300 with a force to slide away from the first sealing element 210, the structure of the sliding member 300 is designed accordingly as follows, so that the sliding member 300 can better cooperate with the first sealing element 210 and the elastic member 500. Specifically, see Figure 5 and Figure 6 The sliding member 300 may include a nested driven slider 320 and an active slider 310; the end face of the driven slider 320 away from the handle 400 is connected to the first sealing element 210; the active slider 310 can slide under the drive of the handle 400, and when it slides to abut against the driven slider 320, it can also drive the driven slider 320 to slide together until the first sealing element 210 switches from the first form to the second form; wherein the elastic member 500 is arranged between the driven slider 320 and the active slider 310.

[0069] When the handle 400 starts to move from the first position, the handle 400 pushes the active slider 310 to slide toward the first sealing element 210, and the elastic member 500 also deforms synchronously at this time; when the active slider 310 slides to abut against the driven slider 320, the elastic member 500 stops deforming, and then the driven slider 320 slides toward the first sealing element 210 driven by the active slider 310, and the first sealing element 210 also deforms under the action of the driven slider 320; when the handle 400 moves to the second position, the first sealing element 210 also switches from the first form to the second form, and then the sealing effect test of the product equipped with the pagoda joint 20 is carried out. It should be noted that before the active slider 310 slides to abut against the driven slider 320, the deformation of the elastic member 500 does not reach the maximum value.

[0070] After the test is completed, the external force on the handle 400 is removed or the handle 400 is moved from the second position to the first position. The active slider 310 slides in the direction away from the first sealing element 210 under the action of the elastic member 500, which can provide a certain space for the first sealing element 210 to be reset. After that, the first sealing element 210 is reset to the first form, and during the reset process of the first sealing element 210, the driven slider 320 is also driven to slide in the direction close to the handle 400.

[0071] Further, regarding how the active slider 310 and the driven slider 320 are nested, this embodiment also provides an example. Specifically, see Figure 5 and Figure 6 , the driven slider 320 may include a small diameter section 321 and a large diameter section 322 connected coaxially, the outer diameter of the small diameter section 321 is smaller than the outer diameter of the large diameter section 322, the small diameter section 321 is sleeved in the active slider 310, the large diameter section 322 is connected to the first sealing element 210, and the elastic member 500 is located in the active slider 310 and abuts against the end surface of the small diameter section 321 away from the first sealing element 210. It can be seen that the active slider 310 in this embodiment is sleeved on the outside of the driven slider 320. Compared with the method in which the driven slider 320 is sleeved on the outside of the active slider 310, there is no need to set a component inside the driven slider 320 specifically used for cooperating and abutting against the active slider 310, which can reduce the processing difficulty of the driven slider 320.

[0072] Among them, the outer diameter of the large diameter section 322 of the driven slider 320 can match the inner diameter of the shell 100, and the shell 100 can guide the sliding of the driven slider 320, so that the driven slider 320 can slide along the inner wall of the shell 100; similarly, the outer diameter of the active slider 310 can also match the inner diameter of the shell 100, and the shell 100 can guide the sliding of the active slider 310, so that the active slider 310 can slide along the inner wall of the shell 100.

[0073] See also Figure 5 and Figure 7 For the sliding member 300 of the above structure, a flow channel 300a is provided at one end of the active slider 310 away from the first sealing element 210, and the outlet of the flow channel 300a is communicated with the interior of the active slider 310. In order to ensure that the fluid can flow from one port of the pagoda connector 20 into the product installed at another port of the pagoda head 20, the driven slider 320 is also a hollow structure, so that the flow channel 300a on the active slider 310 is communicated with the port of the pagoda connector 20. The flow channel 300a may include a vertical portion and a horizontal portion that are communicated.

[0074] In order to further ensure the sealing performance of the sealing structure 10, see Figure 5 In this embodiment, a second sealing element 220 is arranged between the outer wall of the small diameter section 321 and the inner wall of the active slider 310, and / or a third sealing element 230 is arranged between the outer wall of the large diameter section 322 and the inner wall of the housing 100. The second sealing element 220 and the third sealing element 230 are sealing rings, which can be made of rubber. At least one groove is arranged axially on the large diameter section 322 of the driven slider 320, and the second sealing element 220 is installed in the corresponding groove; at least one groove is also arranged axially on the small diameter section 321 of the driven slider 320, and the third sealing element 230 is installed in the corresponding groove. In this way, the installation of the second sealing element 220 and the third sealing element 230 is facilitated.

[0075] The embodiment does not impose any specific restrictions on the second sealing element 220 and the number of the second sealing elements 220, as long as the sealing performance of the sealing structure 10 is ensured. Figure 5 As shown, one second sealing element 220 is provided between the large diameter section 322 of the driven slider 320 and the housing 100 , and two second sealing elements 220 are provided between the small diameter section 321 and the active slider 310 .

[0076] As to how the handle 400 drives the sliding member 300, two methods are given as follows:

[0077] Method (1)

[0078] See also Figures 8 to 10 The handle 400 can be rotatably disposed on the housing 100. Figures 8 to 10The end of the handle 400 close to the sliding member 300 is hinged to the housing 100 through the rotating shaft 410, wherein the handle 400 has a first action surface 400a and a second action surface 400b, the distance between the first action surface 400a and the rotating shaft 410 is smaller than the distance between the second action surface 400b and the rotating shaft 410, and the first action surface 400a and the second action surface 400b respectively contact the sliding member 300 as the handle 400 rotates; when the first action surface 400a contacts the sliding member 300, the first sealing element 210 is switched to the first form; when the second action surface 400b contacts the sliding member 300, the first sealing element 210 is switched to the second form. The handle 400 is not only simple in structure, but also can effectively drive the sliding member 300 to slide toward the first sealing element 210.

[0079] Before testing the sealing effect of the product equipped with the pagoda connector 20, the handle 400 can be Fig. 9 The first position shown is rotated clockwise to Fig.10 The handle 400 can be moved from the first position to the second position as shown, thereby switching the first sealing element 210 from the first position to the second position. Fig.10 The second position shown is rotated counterclockwise to Fig. 9 The first position shown can provide a certain space for the resetting of the elastic member 500, and the active slider 310 of the sliding member 300 slides in the direction away from the first sealing element 210 under the drive of the elastic member 500; then, the first sealing element 210 is reset and switched from the second form to the first form.

[0080] See also Fig. 9 and Fig.10 , the connection between the first action surface 400a and the second action surface 400b of the handle 400 is smoothly transitioned. In this way, it can be ensured that the handle 400 plays a certain protective role on the sliding member 300 and itself when rotating. Among them, the first action surface 400a and the second action surface 400b are both planes. The number of the second action surfaces 400b can be two, and the two second action surfaces 400b are symmetrically distributed on both sides of the axis of the handle 400, so that it is convenient to switch the shape of the first sealing element 210 freely through the manipulation of the handle 400.

[0081] See also Fig. 9 and Fig.10 The outer shape of the handle 400 may be generally dog-bone shaped, and the radial dimension of the end portion close to the sliding member 300 is larger than the radial dimension of the remaining portion. In order to allow the handle 400 to rotate around the rotating shaft 410 without hindrance, see Figure 8, the housing 100 is provided with an avoidance opening 100b, and one end of the handle 400 close to the sliding member 300 is exposed at the avoidance opening 100b. The number of the avoidance openings 100b may be two, and the two avoidance openings 100b are symmetrically distributed on both sides of the axis of the housing, so that the handle 400 can be avoided in all directions. It should be noted that when the first sealing element 210 is in the second form, the inlet of the flow channel 300a on the active slider 310 of the sliding member 300 is also exposed at the avoidance opening 100b, so that it is convenient to pass gas or liquid into the flow channel 300a.

[0082] Method (2)

[0083] The handle 400 can be axially slidably arranged on the housing 100. Before the sealing effect test of the product equipped with the pagoda connector 20 is performed, the handle 400 can be axially slid from the first position to the second position, so as to switch the first sealing element 210 from the first form to the second form. After the sealing effect test of the product equipped with the pagoda connector 20 is completed, the external force on the handle 400 can be directly removed, and then the elastic member 500 is reset, and the elastic member 500 drives the main sliding block of the sliding member 300 to slide in the direction away from the first elastic element, thereby making the handle 400 axially slide from the second position to the first position driven by the active slider 310. Of course, in some other embodiments, the handle 400 can also be axially slid from the second position to the first position first, which can provide a certain space for the resetting of the elastic member 500, and the active sliding block of the sliding member 300 slides in the direction away from the first sealing element 210 under the drive of the elastic member 500.

[0084] The inner wall of the housing 100 may be provided with a strip groove in the axial direction, and the handle 400 may be provided with a protrusion located in the strip groove. The cooperation between the strip groove and the protrusion can not only guide the axial sliding of the handle 400, but also limit the handle 400 in the axial direction when the handle 400 is in the first position, so as to prevent the handle 400 from falling off the housing 100. There are two strip grooves and two protrusions, which are symmetrically distributed on both sides of the axis of the handle 400, and each protrusion is located in the corresponding strip groove.

[0085] See also Fig.11The sealing structure 10 further includes a fourth sealing element 240, which is disposed on the end of the sliding member 300 close to the first sealing element 210, and the fourth sealing element 240 is opposite to the joint sealing cavity 100a. When the port of the pagoda joint 20 extends into the joint sealing cavity 100a of the first sealing element 210, it can abut against the fourth sealing element 240. As the sliding member 300 slides toward the first sealing element 210, the port of the pagoda joint 20 exerts a greater and greater pressure on the fourth sealing element 240, so that the fourth sealing element 240 can achieve sealing of the port of the pagoda joint 20, thereby improving the sealing effect of the sealing structure 10 on the pagoda joint 20 as a whole.

[0086] Among them, the fourth sealing element 240 can be a gasket made of soft rubber material, which can protect the end face of the port of the pagoda connector 20 and prevent the port of the pagoda connector 20 from being damaged when it is squeezed by external force. The fourth sealing element 240 can be fixed to the large diameter section 322 of the driven slider 320 by bonding or other methods. It should be noted that the middle through hole of the gasket is used for the gas or liquid in the flow channel 300a to pass through.

[0087] The end of the sliding member 300 close to the first sealing element 210 is provided with a step surface, and the fourth sealing element 240 is arranged on the step surface. The step surface facilitates the installation of the fourth sealing element 240 and does not affect the deformation of the first sealing element 210 and the cooperation between the first sealing element 210 and the sliding member 300.

[0088] See also Fig.12 and Fig.13 The sealing structure 10 further includes a joint positioning member 600, which is disposed in the housing 100 and connected to the end of the first sealing element 210 away from the sliding member 300. The port of the pagoda joint 20 can be fixed in the joint sealing cavity 100a of the first sealing element 210 by interference fit with the joint positioning member 600, that is, the joint positioning member 600 limits the pagoda joint 20 in the axial and radial directions.

[0089] The joint positioning member 600 may be made of a plastic material with a certain hardness (such as Teflon), which can prevent the joint positioning member 600 from causing friction damage to the pagoda joint 20 during the assembly and disassembly process of the pagoda joint 20 .

[0090] The joint positioning member 600 may be a structure composed of a large diameter section and a small diameter section. The joint positioning member 600 of this structure may be formed with a step surface, and the step surface and the outer walls of the large diameter section and the small diameter section are all connected to the inner wall of the housing 100. In this way, the connection area between the joint positioning member 600 and the housing 100 can be increased, and the connection firmness of the joint positioning member 600 on the housing 100 can be ensured.

[0091] On the other hand, an embodiment of the present application further provides a sealing detection system, which includes any of the sealing structures 10 described above.

[0092] The sealing detection system provided in this embodiment can test the sealing effect of products equipped with pagoda connectors 20. In the sealing detection system, the sliding member 300 of the sealing structure 10 can adjust the shape of the first sealing element 210 by sliding in the housing 100, thereby changing the minimum radial dimension of the joint sealing cavity 100a, so that the wall of the first sealing element 210 is in close contact with or released from the port of the pagoda connector 20, thereby realizing the rapid sealing installation and removal of the joint by the sealing structure 10, and improving the testing or production efficiency. Moreover, during the entire disassembly and assembly process, deformation and loosening of the connection with the pagoda connector 20 caused by frequent use of the plastic plug is avoided, thereby ensuring the long-term durability of the sealing structure 10.

[0093] In this embodiment, the sealing detection system further includes a fluid tank, which is used to provide fluid to the flow channel 300a of the sealing structure 10, so as to test and observe the sealing effect of the product equipped with the pagoda joint 20.

[0094] On the other hand, an embodiment of the present application further provides a sealing detection method, which is implemented by the sealing structure 10 described in any one of the above items, and includes the following steps:

[0095] Adjusting the first sealing element 210 of the sealing structure 10 to a first state;

[0096] Insert one end of the joint 20 of the target object into the joint sealing cavity 100a of the sealing structure 10;

[0097] Driving the sliding member 300 of the sealing structure 10 to slide until the first sealing element 210 switches from the first state to the second state;

[0098] Fluid is injected into the connector 20 through the flow channel 300 a of the sliding member 300 , and a sealing effect test is performed on the target object.

[0099] The sealing detection method is implemented by the sealing structure 10, which can realize the rapid sealing installation and removal of the pagoda joint, and improve the testing or production efficiency. In addition, during the whole disassembly process, the deformation and loosening of the connection between the plastic plug and the pagoda joint 20 caused by frequent use of the plastic plug is avoided, and the sealing structure 10 is ensured to be durable.

[0100] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0101] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A sealing structure, characterized in that: include: A housing, a first sealing element and a sliding member; The first sealing element is arranged in the housing so that a joint sealing cavity is formed inside the housing, the first sealing element has a first form and a second form, and the minimum radial dimension D1 of the joint sealing cavity when the first sealing element is in the second form is smaller than the minimum radial dimension D2 of the joint sealing cavity when the first sealing element is in the first form; The sliding member has a flow channel communicating with the outside of the sealing structure and the joint sealing cavity. The sliding member can be slidably arranged in the shell to adjust the shape of the first sealing element, wherein when the first sealing element is in the second shape, the sliding member presses against the axial end face of the first sealing element.

2. The sealing structure according to claim 1, characterized in that: The sealing structure further comprises a handle movably disposed on the housing, and when the handle moves, the sliding member can be driven to slide in the housing to adjust the shape of the first sealing element.

3. The sealing structure according to claim 2, characterized in that: The handle is rotatably disposed on the housing, or the handle is axially slidably disposed on the housing.

4. The sealing structure according to claim 3, characterized in that: One end of the handle close to the sliding member is hinged to the housing through a rotating shaft, the handle has a first action surface and a second action surface, the distance between the first action surface and the rotating shaft is smaller than the distance between the second action surface and the rotating shaft, and the first action surface and the second action surface respectively abut against the sliding member as the handle rotates; When the first action surface abuts against the sliding member, the first sealing element is switched to the first form; when the second action surface abuts against the sliding member, the first sealing element is switched to the second form.

5. The sealing structure according to claim 4, characterized in that: The housing is provided with an escape opening, and one end of the handle close to the sliding member is exposed at the escape opening.

6. The sealing structure according to any one of claims 2 to 5, wherein the first sealing element is made of elastic material and its original form is the first form, and the axial length of the first sealing element in the first form is greater than the axial length in the second form; The sealing structure further comprises an elastic member arranged on the sliding member, and the elastic member is used for providing a force for the sliding member to slide in a direction away from the first sealing element, so as to avoid resetting of the first sealing element.

7. The sealing structure according to claim 6, characterized in that: The sliding member comprises a driven slider and an active slider which are nested with each other; the end surface of the driven slider away from the handle is connected to the first sealing element; the active slider can slide under the drive of the handle, and when it slides to abut against the driven slider, it can drive the driven slider to slide together until the first sealing element switches from the first state to the second state; Wherein, the elastic member is arranged between the driven slider and the active slider.

8. The sealing structure according to claim 7, characterized in that: The driven slider includes a small diameter section and a large diameter section which are coaxially connected. The outer diameter of the small diameter section is smaller than the outer diameter of the large diameter section. The small diameter section is arranged in the active slider. The large diameter section is used to connect with the first sealing element. The elastic member is located in the active slider and abuts against the end surface of the small diameter section away from the first sealing element.

9. The sealing structure according to claim 8, characterized in that: A second sealing element is provided between the outer wall of the small diameter section and the inner wall of the active sliding block, and / or a third sealing element is provided between the outer wall of the large diameter section and the inner wall of the housing.

10. The sealing structure according to claim 1, characterized in that: When the first sealing element is in the first state, the outer shape is cylindrical, and when the first sealing element is in the second state, the side surface is bent inward; And / or, the first sealing element is in the shape of a bellows, wherein when the first sealing element is in the first form, the depth of the recessed portion of the first sealing element is recorded as H1, and when the first sealing element is in the second form, the depth of the recessed portion of the first sealing element is recorded as H2, H2>H1.

11. The sealing structure according to claim 1, characterized in that: The sealing structure further comprises a fourth sealing element, which is disposed on an end of the sliding member close to the first sealing element, and is opposite to the joint sealing cavity.

12. The sealing structure according to claim 1, characterized in that: The sealing structure further comprises a joint positioning member, wherein the joint positioning member is disposed in the housing and connected to an end of the first sealing element away from the sliding member.

13. The sealing structure according to claim 1, characterized in that: The sealing structure is used to detect the sealing performance of an object connected to a pagoda joint, and the joint sealing cavity is used to receive one end of the pagoda joint.

14. A sealing detection method, characterized in that: The steps include: adjusting a first sealing element of the sealing structure to a first configuration; Inserting one end of the connector of the target object into the connector sealing cavity of the sealing structure; driving the sliding member of the sealing structure to slide until the first sealing element switches from the first state to the second state; Fluid is injected into the joint through the flow channel of the sliding member, and a sealing effect test is performed on the target object.

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