Downward pressing type sealing gland

Abstract

The utility model discloses a pressing type sealing gland which comprises a gland body, an arc edge is arranged on the gland body, a guide hole is formed in the arc edge and located in the gland body, a guide rail rod is arranged in the guide hole in a connected mode, a connecting piece is located in the middle of the upper end of the gland body, the connecting piece comprises a base, a supporting cylinder is arranged on the base in a connected mode, and the supporting cylinder is connected with the arc edge. A first thread is connected to the side wall of the bottom end of the supporting cylinder, a movable sleeve is arranged on the supporting cylinder in a sleeving mode, a second thread is arranged at the bottom of the inner side wall of the movable sleeve, a third thread is arranged above the second thread and located on the inner side wall of the movable sleeve, and a connecting sleeve is connected to the movable sleeve. A fourth thread is arranged at the upper end of the outer wall of the connecting sleeve, a ring seat is arranged at the upper end of the connecting sleeve, a fifth thread is arranged on the inner wall of the ring seat, and by means of the structural arrangement, the problems that a profiling cavity cover connected with a sealing gland is large in stress and prone to being damaged, and the profiling cavity cover is inconvenient to connect with a test push rod can be effectively solved.

Description

Technical Field

[0001] The utility model belongs to the technical field related to sealing workpiece tools, and in particular relates to a downward-pressing sealing gland. Background Art

[0002] The air tightness test of explosion-proof cameras is an indispensable project in the production process. The air tightness test instrument performs four steps of inflation, voltage stabilization, testing, and exhaust to detect the pressure changes inside the product, detect the leakage value, and automatically judge whether the product is OK or NG according to the pre-set parameters. In order to avoid other factors interfering with the test results, the product is usually placed in the contour chamber in the testing equipment, and the product is sealed in the contour chamber by a sealing cover, and then the test steps are carried out, that is, the variables are controlled to perform the air tightness test of the product.

[0003] The existing technology has the following problems: when the existing airtightness testing equipment performs airtightness testing on the product, in order to improve the sealing performance, a downward pressure sealing gland is used to seal the contoured cavity, which causes the contoured cavity cover connected to the sealing gland to be subjected to greater force and is easily damaged. In addition, when the downward pressure sealing gland is used, the gland is heavy and it is very inconvenient to connect it to the push rod of the test instrument. Utility Model Content

[0004] The utility model aims to provide a downward pressure sealing gland to solve the problems in the background art that the contoured cavity cover connected to the sealing gland is easily damaged by a large force and is inconvenient to connect with a test push rod.

[0005] To achieve the above object, the utility model provides the following technical solution: a downward pressure sealing gland, comprising a cover body, the cover body is provided with an arc edge, a guide hole is provided on the arc edge and located on the cover body, and a guide rail rod is connected and provided in the guide hole;

[0006] The connecting piece is located at the middle part of the upper end of the cover body, and the connecting piece includes a base, a supporting tube is connected to the base, a first thread is connected to the bottom side wall of the supporting tube, a movable sleeve is sleeved on the supporting tube, a second thread is arranged at the bottom of the inner wall of the movable sleeve, a third thread is arranged above the second thread and on the inner wall of the movable sleeve, a connecting sleeve is connected to the movable sleeve, a fourth thread is arranged on the upper end of the outer wall of the connecting sleeve, a ring seat is arranged at the upper end of the connecting sleeve, and a fifth thread is arranged on the inner wall of the ring seat.

[0007] Preferably, the guide hole passes through the arc edge, and the arc edge is respectively arranged at four vertex corners of the cover body.

[0008] Preferably, the bottom of the cover body is provided with concave edges, and there are four groups of concave edges. Sealing strips are provided on the four groups of concave edges. A groove is provided between the four groups of concave edges and at the bottom of the cover body, and a contoured cavity cover is provided in the groove.

[0009] Preferably, the bottom of the movable sleeve is connected to the support tube through the engagement of the first thread and the second thread.

[0010] Preferably, the upper end of the movable sleeve is connected to the connecting sleeve through the engagement of the third thread and the fourth thread.

[0011] Preferably, the second thread and the third thread are both distributed on the inner wall of the movable sleeve, and the spacing between the second thread and the third thread is equal to the distance from the bottom of the connecting sleeve to the fourth thread.

[0012] Preferably, the outer diameter of the connecting sleeve is equal to the inner diameter of the movable sleeve, and the outer diameter of the supporting sleeve is equal to the inner diameter of the movable sleeve.

[0013] Preferably, the base is fixedly connected to the middle portion of the upper end of the cover body.

[0014] Compared with the prior art, the utility model provides a downward pressure sealing gland, which has the following beneficial effects:

[0015] 1. In the present invention, the connection between the push rod of the test instrument and the cover body is flexibly realized through the connecting piece device, which facilitates the rapid disassembly and installation of the cover body and improves the work efficiency.

[0016] 2. In the utility model, a concave edge is provided at the bottom of the cover body outside the contoured cavity cover. When the push rod of the testing instrument applies downward pressure to the cover body, the sealing strip located on the concave edge shares the downward pressure with the contoured cavity cover without destroying the sealing performance, thereby reducing the pressure on the contoured cavity cover, protecting the contoured cavity cover, prolonging its service life, and reducing its use cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall connection structure of the utility model.

[0018] Figure 2 It is a schematic diagram of the connection structure between the connector and the cover body of the utility model.

[0019] Figure 3 It is a schematic diagram of the bottom connection structure of the cover body of the present invention.

[0020] Figure 4 It is a schematic diagram of the overall connection structure of the connector of the utility model.

[0021] Figure 5It is a schematic diagram of the specific structural connection of the connector of the utility model.

[0022] In the figure: 1, cover body; 2, concave edge; 3, arc edge; 4, guide hole; 5, guide rod; 6, connecting piece; 7, sealing strip; 8, groove; 9, contoured cavity cover; 61, base; 62, first thread; 63, support tube; 64, movable sleeve; 65, second thread; 66, third thread; 67, connecting sleeve; 68, fourth thread; 69, ring seat; 70, fifth thread. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] The utility model provides Figure 1-5 A downward pressure sealing gland shown in the figure comprises a cover body 1, an arc edge 3 is arranged on the cover body 1, a guide hole 4 is arranged on the arc edge 3 and located on the cover body 1, and a guide rail rod 5 is connected and arranged in the guide hole 4;

[0025] The connecting member 6 is located in the middle of the upper end of the cover body 1, and the connecting member 6 includes a base 61, a supporting tube 63 is connected to the base 61, a first thread 62 is connected to the bottom side wall of the supporting tube 63, a movable sleeve 64 is sleeved on the supporting tube 63, a second thread 65 is provided at the bottom of the inner wall of the movable sleeve 64, a third thread 66 is provided above the second thread 65 and on the inner wall of the movable sleeve 64, a connecting sleeve 67 is connected to the movable sleeve 64, a fourth thread 68 is provided on the upper end of the outer wall of the connecting sleeve 67, a ring seat 69 is provided at the upper end of the connecting sleeve 67, and a fifth thread 70 is provided on the inner wall of the ring seat 69.

[0026] In this embodiment, the cover body 1 is connected to the guide rod 5 through the guide holes 4 on the arc edge 3 at the four vertex positions, the guide rod 5 is fixedly connected to the test instrument for the side leakage of the explosion-proof camera, and then connected to the push rod on the test instrument for the side leakage of the explosion-proof camera through the connecting piece 6 in the middle of the upper end of the cover body 1. During the detection process, the sample to be detected is placed in the profiling cavity of the detection station, and the cover body 1 is pushed downward along the guide rod 5 by the push rod on the test instrument until the profiling cavity cover 9 located in the middle of the bottom end of the cover body 1 is completely fitted with the profiling cavity of the test instrument. At this time, the cover body 1 and the test instrument are connected at the concave edge 2, and the sealing on the concave edge 2 The seal 7 is fitted to the peripheral structure of the contoured cavity in the test instrument and gradually fits together under the push of the push rod, forming a stable and strong structure on the periphery of the contoured cavity cover 9, and sharing the pressure from the push rod pushing the cover body 1 downward together with the contoured cavity cover 9. When the connecting piece 6 is connected to the push rod of the test instrument, the connection state of the third thread and the fourth thread 68 at the top of the inner wall of the movable sleeve 64 and the connection state of the second thread 65 and the first thread 62 located at the middle and lower part of the inner wall of the movable sleeve 64 are changed by rotating the movable sleeve 64, so as to flexibly realize the installation of the push rod in the test instrument and the fifth thread 70 in the ring seat 69.

[0027] In an optional embodiment, the guide hole 4 passes through the arc edge 3, and the arc edge 3 is respectively arranged at the four top corners of the cover body 1. The bottom of the cover body 1 is provided with a concave edge 2, and the concave edge 2 is provided with four groups. The four groups of concave edges 2 are all provided with sealing strips 7. A groove 8 is provided between the four groups of concave edges 2 and at the bottom of the cover body 1, and a contoured cavity cover 9 is provided in the groove 8.

[0028] In this embodiment, the concave edge 2 at the bottom of the cover body 1 and the sealing strip 7 on the concave edge 2 can share the downward pressure from the push rod of the test instrument with the contoured cavity cover 9 without destroying the sealing performance, thereby reducing the pressure on the contoured cavity cover and protecting the contoured cavity cover.

[0029] In an optional embodiment, the bottom of the movable sleeve 64 is connected to the support tube 63 through the engagement of the first thread 62 and the second thread 65 , and the upper end of the movable sleeve 64 is connected to the connecting sleeve 67 through the engagement of the third thread 66 and the fourth thread 68 .

[0030] In this embodiment, the two sets of threads in the inner wall of the movable sleeve 64 are respectively connected with the thread structures on the support tube 63 and the connecting sleeve 64, so that the ring seat 69 has the advantages of quick disassembly and quick installation, thereby realizing the connection between the test instrument push rod and the cover body, and facilitating the quick disassembly and installation of the cover body.

[0031] In an optional embodiment, the second thread 65 and the third thread 66 are both distributed on the inner wall of the movable sleeve 64 , and the spacing between the second thread 65 and the third thread 66 is equal to the distance from the bottom of the connecting sleeve 67 to the fourth thread 68 .

[0032] In an optional embodiment, the outer diameter of the connecting sleeve 67 is equal to the inner diameter of the movable sleeve 64 , and the outer diameter of the supporting sleeve 63 is equal to the inner diameter of the movable sleeve 64 .

[0033] In an optional embodiment, the base 61 is fixedly connected to the middle portion of the upper end of the cover body 1 .

[0034] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A downward pressure sealing gland, comprising a cover body (1), wherein the cover body (1) is provided with an arc edge (3), a guide hole (4) is provided on the arc edge (3) and located on the cover body (1), and a guide rail rod (5) is connected and provided in the guide hole (4); Features: The connecting member (6) is located at the middle of the upper end of the cover body (1), and the connecting member (6) comprises a base (61), a supporting tube (63) is connected to the base (61), a first thread (62) is connected to the bottom side wall of the supporting tube (63), a movable sleeve (64) is sleeved on the supporting tube (63), a second thread (65) is provided at the bottom of the inner wall of the movable sleeve (64), a third thread (66) is provided above the second thread (65) and on the inner wall of the movable sleeve (64), a connecting sleeve (67) is connected to the movable sleeve (64), a fourth thread (68) is provided at the upper end of the outer wall of the connecting sleeve (67), a ring seat (69) is provided at the upper end of the connecting sleeve (67), and a fifth thread (70) is provided on the inner wall of the ring seat (69).

2. The downward-pressed sealing gland according to claim 1, characterized in that: The guide hole (4) passes through the arc edge (3), and the arc edge (3) is respectively arranged at four vertex positions of the cover body (1).

3. The downward-pressed sealing gland according to claim 1, characterized in that: The bottom of the cover body (1) is provided with a concave edge (2), and the concave edges (2) are provided in four groups. A sealing strip (7) is provided on each of the four groups of concave edges (2). A groove (8) is provided between the four groups of concave edges (2) and located at the bottom of the cover body (1), and a contoured cavity cover (9) is provided in the groove (8).

4. The downward-pressed sealing gland according to claim 1, characterized in that: The bottom of the movable sleeve (64) is connected to the support tube (63) through the engagement of the first thread (62) and the second thread (65).

5. The downward-pressed sealing gland according to claim 1, characterized in that: The upper end of the movable sleeve (64) is connected to the connecting sleeve (67) through the engagement of the third thread (66) and the fourth thread (68).

6. The downward-pressed sealing gland according to claim 1, characterized in that: The second thread (65) and the third thread (66) are both distributed on the inner wall of the movable sleeve (64), and the spacing between the second thread (65) and the third thread (66) is equal to the distance from the bottom of the connecting sleeve (67) to the fourth thread (68).

7. The downward-pressed sealing gland according to claim 1, characterized in that: The outer diameter of the connecting sleeve (67) is equal to the inner diameter of the movable sleeve (64), and the outer diameter of the supporting sleeve (63) is equal to the inner diameter of the movable sleeve (64).

8. The downward-pressed sealing gland according to claim 1, characterized in that: The base (61) is fixedly connected to the middle portion of the upper end of the cover body (1).

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