A device for detecting sealing performance of an instrument

Abstract

The present invention discloses an instrument sealing detection device, which relates to the field of instrument detection technology and solves the problem that when installing several groups of instrument casings, the operation is complicated, the time is long, and the detection efficiency is low. The device comprises a machine base, an air pump is installed inside the machine base, a water tank is fixedly installed on the upper end of the machine base, and several groups of rectangular frames distributed in an array are fixedly installed on the inner side of the water tank, and the several groups of rectangular frames are arranged in a grid shape. The several groups of rectangular frames are fixedly connected, and the water tank and the rectangular frames are both made of acrylic material; the present invention uses a supporting structure and a locking component, and when installing the instrument casing, it is only necessary to insert the threaded joint of the instrument casing into the sleeve, so the disassembly and assembly of the instrument casing is simple and fast, which can effectively improve the detection efficiency; by installing the blocking structure, the two blocking plates are rotated and reset to the horizontal rectangular frame under the drive of the coil spring, so as to seal the water tank, thereby effectively avoiding the accumulation of dust in the water tank when the detection device is not used.

Description

Technical Field

[0001] The present invention relates to the technical field of instrument detection, in particular to an instrument sealing detection device. Background Art

[0002] An instrument is a type of instrument used to display or measure various physical quantities (such as pressure, temperature, speed, displacement, voltage, etc.) in production and scientific and technological work. The commonly used types are indicating, recording and signal types. According to their uses, they are divided into aviation instruments, meteorological instruments, thermal instruments and electrical instruments.

[0003] Existing Chinese patent CN215448344U discloses a waterproof instrument sealing test device. It uses an air pump and a fixed pipe to blow air into the instrument housing and observes whether there is a steam drum in each small water tank to check the instrument air tightness. The structure is simpler than that of an air tightness tester, with low manufacturing cost. It can also test multiple instruments simultaneously, increasing detection efficiency, strong practicality, and a wide range of applications.

[0004] However, during the use of the above device, when installing the instrument housing, the instrument housing needs to be installed on the air pipe through the external thread and the internal thread, and in order to ensure the sealing between the instrument housing and the air pipe, it needs to be tightened with force, and then the fixing tube needs to be installed on the mounting base through the buckle. As a result, when installing several sets of instrument housings, the operation is complicated and time-consuming, resulting in low detection efficiency. Summary of the Invention

[0005] The object of the present invention is to provide an instrument sealing detection device that is easy to install on the instrument housing, so as to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A device for detecting the sealing properties of an instrument and meter comprises a machine base, an air pump being installed inside the machine base, a water trough being fixedly installed on the upper end of the machine base, a plurality of groups of rectangular frames distributed in an array being fixedly installed on the inner side of the water trough, and the plurality of groups of rectangular frames being arranged in a grid shape, and the plurality of groups of rectangular frames being fixedly connected to each other, the water trough and the rectangular frames being made of acrylic material, two symmetrically distributed second electric push rods being fixedly installed on the outer side of the water trough at the upper end of the machine base, and four groups of top rods distributed in an array being fixedly installed on the upper end of the water trough; a support structure for installing and supporting an instrument is installed on the upper side of the water trough.

[0008] Preferably, the support structure includes a support plate installed on the upper side of the water tank and fixedly connected to the second electric push rod, the lower end of the support plate is located directly above the rectangular frame and a first electric push rod corresponding to the number of the rectangular frames is installed, the lower end of the first electric push rod is fixedly connected to a sleeve, and a plurality of groups of notch grooves equidistantly distributed around the circumference are provided at the lower end port of the sleeve, an arc-shaped rubber pad is fixedly installed on the inner wall of the notch groove of the first electric push rod, the arc-shaped rubber pad can increase the friction between the sleeve and the threaded joint of the instrument housing, and an inflatable structure is installed inside the first electric push rod.

[0009] Preferably, the inflatable structure includes a first conduit interconnected with the air pump inside the base, a second conduit is installed on the upper end of the support plate, and a third conduit equal in number to the rectangular frame is fixedly installed on the lower end of the second conduit, and the second conduit and the third conduit are interconnected, the third conduit passes through the sleeve and is fixedly connected to the sleeve, and a positioning seat is fixedly sleeved on the outer side of the third conduit, which facilitates fixing the third conduit inside the sleeve.

[0010] Preferably, the connection between the positioning seat and the sleeve is a fixed connection, the lower end of the positioning seat is fixedly installed with an air nozzle, and the air nozzle and the third conduit are communicated with each other, the outer side of the air nozzle is fixedly sleeved with a rubber sleeve, the rubber sleeve can increase the friction between the air nozzle and the instrument housing threaded joint, a rotary joint is fixedly installed between the first conduit and the second conduit, and the first conduit is rotatably connected to the second conduit through the rotary joint, the lower end of the sleeve is movably connected with the instrument housing, the arc-shaped rubber pad is tightly fitted with the outer wall of the instrument housing threaded joint, and the rubber sleeve is tightly fitted with the inner wall of the instrument housing threaded joint.

[0011] Preferably, the support plate and the outer side of the sleeve are movably connected with a locking assembly, and the locking assembly includes two first gears symmetrically installed on the outer side of the sleeve, and a positioning shaft is fixedly embedded in the first gear toward the center of one end face of the sleeve, and a fixing seat is installed between the sleeve and the first gear, and the connection between the fixing seat and the sleeve is an integrally formed structure, and the positioning shaft is rotatably connected to the fixing seat through a bearing, and the bearing can reduce the friction between the positioning shaft and the fixing seat.

[0012] Preferably, a locking ring is movably sleeved on the outer side of the first electric push rod, and a first rack and a second rack meshing with each other are respectively installed on the outer side of the first gear, and the first rack and the second rack are distributed on both sides of the first gear, the connection between the first rack and the support plate is a fixed connection, and the connection between the second rack and the locking ring is a fixed connection, and a plurality of groups of balls equidistantly distributed around the circumference are movably embedded on the inner wall of the locking ring, and the connection between the balls and the sleeve is a rolling connection, and the locking ring can squeeze the lower port of the sleeve when driving the balls to move downward.

[0013] Preferably, a sealing assembly is installed inside the rectangular frame, and the sealing assembly includes two symmetrically distributed sealing plates, and two symmetrically distributed mounting shafts are fixedly installed on the outer side of the sealing plate, and the sealing plate is rotatably connected to the rectangular frame through the mounting shaft, and a coil spring is fixedly sleeved on the outer side of the mounting shaft, and the coil spring is located at one end of the outer side and fixedly connected to the rectangular frame, and the coil spring can drive the sealing plate horizontally in the rectangular frame, and the opposite ends of the sealing plates at both ends are movably embedded with connecting shafts, and rollers are fixedly installed at both ends of the connecting shaft, and the connecting shaft is rotatably connected to the sealing plate through the roller, and the connection method between the roller and the instrument housing, the first rack and the second rack is a rolling connection.

[0014] Preferably, a connecting assembly is provided between the second electric push rod and the support plate, the connecting assembly includes a hollow shaft fixedly connected to the support plate, and the rotary joint is installed inside the hollow shaft, the upper end of the second electric push rod is fixedly connected to the support seat, and the hollow shaft is rotatably connected to the support seat through a bearing, the bearing can reduce the friction between the hollow shaft and the support seat, the outer side of the hollow shaft is located between the support plate and the support seat and a second gear is fixedly sleeved, the outer side of the second gear is installed with a third rack meshing with it, and the connection between the third rack and the machine base is a fixed connection.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention installs the support structure and the locking assembly. When installing the instrument housing, it is only necessary to insert the threaded joint of the instrument housing into the sleeve. The disassembly and assembly of the instrument housing is simple and quick, which can effectively improve the detection efficiency. The arc-shaped rubber pad in the sleeve is tightly fitted with the outer wall of the threaded joint of the instrument housing, and the rubber sleeve outside the air nozzle is tightly fitted with the inner wall of the threaded joint of the instrument housing. When the first electric push rod drives the instrument housing into the water tank, the lock ring in the locking assembly moves downward to squeeze the lower end of the sleeve through the ball, which is conducive to locking the threaded joint of the instrument housing and the sleeve, thereby effectively preventing the instrument housing from being separated from the sleeve when the inflatable structure is inflated into the instrument housing.

[0017] The present invention installs a blocking structure, which can drive the two blocking plates to rotate and open when the instrument housing moves down and enters the water tank, so that the instrument housing can smoothly enter the water tank. When the instrument housing moves out of the water tank, the two blocking plates are driven by the coil spring to rotate and reset horizontally in the rectangular frame, thereby sealing the water tank, thereby effectively preventing dust from accumulating in the water tank when the detection device is not in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a side cross-sectional diagram of the water tank and rectangular frame of the present invention;

[0020] Figure 3 This is a schematic diagram of the plug-in state of a single instrument housing and a sleeve of the present invention;

[0021] Figure 4 It is a side cross-sectional schematic diagram of the connection between a single instrument housing and a sleeve of the present invention;

[0022] Figure 5 For the present invention Figure 4 Schematic diagram of the disassembly of the lock ring and sleeve at B in the middle;

[0023] Figure 6 This is an overall schematic diagram of a single locking assembly of the present invention;

[0024] Figure 7 This is an overall schematic diagram of the water tank of the present invention;

[0025] Figure 8 This is a schematic diagram of the separation of the blocking component and the rectangular frame of the present invention;

[0026] Figure 9 For the present invention Figure 2 A side section diagram.

[0027] In the figure: 1. Machine base; 2. Water tank; 3. Rectangular frame; 4. Support structure; 401. Support plate; 402. First electric push rod; 403. Casing; 404. Notched groove; 405. Curved rubber pad; 5. Inflatable structure; 501. First conduit; 502. Second conduit; 503. Third conduit; 504. Positioning seat; 505. Air nozzle; 506. Rubber sleeve; 507. Rotary joint; 6. Instrument housing; 7. Locking assembly 701. First gear; 702. Positioning shaft; 703. Locking ring; 704. First rack; 705. Second rack; 706. Ball; 8. Sealing assembly; 801. Sealing plate; 802. Mounting shaft; 803. Coil spring; 804. Connecting shaft; 805. Roller; 9. Connecting assembly; 901. Hollow shaft; 902. Support seat; 903. Second gear; 10. Second electric push rod; 11. Third rack; 12. Push rod. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] Example 1

[0030] See also Figure 1 、 Figure 2 、 Figure 3 and Figure 4 The figure shows an instrument sealing detection device, which includes a base 1, an air pump is installed inside the base 1, a water tank 2 is fixedly installed on the upper end of the base 1, and a plurality of groups of rectangular frames 3 distributed in an array are fixedly installed on the inner side of the water tank 2, and the plurality of groups of rectangular frames 3 are arranged in a grid shape. The plurality of groups of rectangular frames 3 are fixedly connected, and the water tank 2 and the rectangular frames 3 are both made of acrylic material. Two symmetrically distributed second electric push rods 10 are fixedly installed on the outer side of the water tank 2 at the upper end of the base 1, and four groups of array-distributed top rods 12 are fixedly installed on the upper end of the water tank 2; a support structure 4 for installing and supporting the instrument is installed on the upper side of the water tank 2.

[0031] See also Figure 34, the support structure 4 includes a support plate 401 installed on the upper side of the water tank 2 and fixedly connected to the second electric push rod 10, the lower end of the support plate 401 is located directly above the rectangular frame 3 and is installed with a first electric push rod 402 corresponding to the number of the rectangular frame 3, the lower end of the first electric push rod 402 is fixedly connected with a sleeve 403, and the lower end port of the sleeve 403 is provided with a plurality of groups of notched grooves 404 equidistantly distributed around the circumference, an arc-shaped rubber pad 405 is fixedly installed on the inner wall of the notched groove 404 of the first electric push rod 402, and an inflatable structure 5 is installed inside the first electric push rod 402.

[0032] See also Figure 2 and Figure 4 The inflatable structure 5 includes a first conduit 501 that is interconnected with the air pump inside the base 1, a second conduit 502 is installed on the upper end of the support plate 401, and a third conduit 503 equal in number to the rectangular frame 3 is fixedly installed on the lower end of the second conduit 502, and the second conduit 502 and the third conduit 503 are interconnected, the third conduit 503 passes through the sleeve 403 and is fixedly connected to the sleeve 403, and a positioning seat 504 is fixedly sleeved on the outer side of the third conduit 503.

[0033] See also Figure 4 The connection between the positioning seat 504 and the sleeve 403 is a fixed connection. The lower end of the positioning seat 504 is fixedly installed with an air nozzle 505, and the air nozzle 505 and the third conduit 503 are communicated with each other. The outer side of the air nozzle 505 is fixedly sleeved with a rubber sleeve 506. A rotary joint 507 is fixedly installed between the first conduit 501 and the second conduit 502, and the first conduit 501 is rotatably connected to the second conduit 502 through the rotary joint 507. The lower end of the sleeve 403 is movably connected with the instrument housing 6. The arc-shaped rubber pad 405 fits tightly against the outer wall of the threaded joint of the instrument housing 6, and the rubber sleeve 506 fits tightly against the inner wall of the threaded joint of the instrument housing 6.

[0034] See also Figure 6 The first electric push rod 402 and the outer side of the sleeve 403 are movably connected with a locking assembly 7. The locking assembly 7 includes two first gears 701 symmetrically installed on the outer side of the sleeve 403. The first gear 701 is fixedly embedded with a positioning shaft 702 at the center of the end face of one side of the sleeve 403. A fixing seat is installed between the sleeve 403 and the first gear 701, and the connection between the fixing seat and the sleeve 403 is an integrated molding structure. The positioning shaft 702 is rotatably connected to the fixing seat through a bearing.

[0035] See also Figure 6A locking ring 703 is movably sleeved on the outer side of the sleeve 403, and a first rack 704 and a second rack 705 that mesh with each other are respectively installed on the outer side of the first gear 701, and the first rack 704 and the second rack 705 are distributed on both sides of the first gear 701. The connection between the first rack 704 and the support plate 401 is a fixed connection, and the connection between the second rack 705 and the locking ring 703 is a fixed connection. Several groups of balls 706 distributed equidistantly around the circumference are movably embedded on the inner wall of the locking ring 703, and the connection between the balls 706 and the sleeve 403 is a rolling connection.

[0036] The working principle of the instrument housing is convenient for installation: first, the threaded joint of the instrument housing 6 is inserted into the lower end of the sleeve 403. At this time, the arc-shaped rubber pad 405 fits with the outer wall of the threaded joint of the instrument housing 6, and the rubber sleeve 506 fits tightly with the inner wall of the threaded joint of the instrument housing 6. The instrument housing 6 will not easily fall off from the lower end of the sleeve 403. Then the first electric push rod 402 drives the sleeve 403 and the instrument housing 6 into the rectangular frame 3 in the water tank 2. In the process of the sleeve 403 moving downward, the sleeve 403 drives the first gear 701 to move downward. Under the condition that the first gear 701 is meshed with the first rack 704 and the second rack 705, in the process of the first gear 701 moving downward, the first rack 704 can drive the second rack 705 to move downward. A gear 701 rotates, and the rotation of the first gear 701 can drive the second rack 705 and the lock ring 703 to move downward. When the lock ring 703 drives several groups of balls 706 to move to the outside of the notch groove 404 on the sleeve 403, several groups of balls 706 press against the outer wall of the sleeve 403, so that the lower end of the sleeve 403 can squeeze the threaded joint of the instrument housing 6 through the arc-shaped rubber pad 405, thereby preventing the instrument housing 6 from being forced to separate from the sleeve 403 when the inflatable structure 5 is inflated into the instrument housing 6. When the instrument housing 6 is immersed in water, the cylinder in the machine base 1 inflates the instrument housing 6 through the inflatable structure 5. When the sealing of the instrument housing 6 is poor, bubbles will appear in the water in the rectangular frame 3 of the instrument housing.

[0037] Example 2

[0038] See also Figure 7 and Figure 8, this embodiment further explains Example 1, a blocking component 8 is installed inside the rectangular frame 3, and the blocking component 8 includes two symmetrically distributed blocking plates 801, and two symmetrically distributed mounting shafts 802 are fixedly installed on the outer side of the blocking plate 801, and the blocking plate 801 is rotatably connected to the rectangular frame 3 through the mounting shaft 802, and a coil spring 803 is fixedly sleeved on the outer side of the mounting shaft 802, and the coil spring 803 is located at one end of the outer side and fixedly connected to the rectangular frame 3, and the opposite ends of the blocking plates 801 at both ends are movably embedded with a connecting shaft 804, and rollers 805 are fixedly installed at both ends of the connecting shaft 804, and the connecting shaft 804 is rotatably connected to the blocking plate 801 through the roller 805, and the connection between the roller 805 and the instrument housing 6, the first rack 704 and the second rack 705 is a rolling connection.

[0039] In this embodiment: when the first electric push rod 402 pushes the instrument housing 6 to immerse in water, the instrument housing 6 squeezes the two sealing plates 801 to rotate open, and when the instrument housing 6 continues to move downward, the rollers 805 at the opposite ends of the two sealing plates 801 roll on the surfaces of the instrument housing 6, the first rack 704 and the second rack 705. When the first electric push rod 402 drives the instrument housing 6 to move out of the rectangular frame 3, the rollers 805 roll in the opposite direction on the surfaces of the instrument housing 6, the first rack 704 and the second rack 705. When the instrument housing 6 is completely moved out of the rectangular frame 3, the two sealing plates 801 will rotate and reset under the drive of the coil spring 803, so that the two sealing plates 801 are horizontal in the rectangular frame 3, sealing the rectangular frame 3, and avoiding dust in the rectangular frame 3 that is inconvenient to clean when the detection device is not in use.

[0040] Example 3

[0041] Please refer to the figure Figure 2 and Figure 9 , this embodiment further explains other embodiments, a connecting component 9 is provided between the second electric push rod 10 and the support plate 401, the connecting component 9 includes a hollow shaft 901 fixedly connected to the support plate 401, and the rotary joint 507 is installed inside the hollow shaft 901, the upper end of the second electric push rod 10 is fixedly connected to the support seat 902, and the hollow shaft 901 is rotatably connected to the support seat 902 through a bearing, the outer side of the hollow shaft 901 is located between the support plate 401 and the support seat 902, and a second gear 903 is fixedly sleeved thereon, and a third rack 11 meshingly connected thereto is installed on the outer side of the second gear 903, and the connection between the third rack 11 and the machine base 1 is a fixed connection.

[0042] In this embodiment: when the instrument housing 6 is moved out of the water tank 2, the second electric push rod 10 drives the support plate 401 to move upward through the connecting assembly 9. When the second electric push rod 10 drives the second gear 903 in the connecting assembly 9 to move to the convex teeth on the third rack 11, under the condition that the second gear 903 and the third rack 11 are engaged with each other, the third rack 11 can drive the second gear 903 to rotate during the upward movement of the second gear 903. After the third rack 11 drives the second gear 903 and the support plate 401 to rotate 360°, the support plate 401 stops moving upward. At this time, the bottom surface of the support plate 401 faces upward, so that the inspection personnel can disassemble and assemble the instrument housing 6 on the upper side of the support plate 401, and the operation is more convenient.

[0043] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0044] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An instrument and meter sealing detection device, comprising a base (1), an air pump is installed inside the base (1), a water tank (2) is fixedly installed on the upper end of the base (1), a plurality of groups of rectangular frames (3) distributed in an array are fixedly installed on the inner side of the water tank (2), and the plurality of groups of rectangular frames (3) are arranged in a grid shape, and the plurality of groups of rectangular frames (3) are fixedly connected to each other, the water tank (2) and the rectangular frames (3) are both made of acrylic material, and two symmetrically distributed second electric push rods (10) are fixedly installed on the outer side of the water tank (2) at the upper end of the base (1), characterized in that: Four groups of top rods (12) distributed in an array are fixedly mounted on the upper end of the water tank (2); A support structure (4) for mounting and supporting an instrument, the support structure (4) being mounted on the upper side of the water tank (2); The support structure (4) comprises a support plate (401) mounted on the upper side of the water tank (2) and fixedly connected to the second electric push rod (10); the lower end of the support plate (401) is located directly above the rectangular frame (3) and is provided with a first electric push rod (402) corresponding in number to the rectangular frame (3); the lower end of the first electric push rod (402) is fixedly connected to a sleeve (403); a plurality of groups of notched grooves (404) equidistantly distributed around a circumference are provided at the lower end of the sleeve (403); an arc-shaped rubber pad (405) is fixedly installed on the inner wall of the notched groove (404) of the first electric push rod (402); and an inflatable structure (5) is installed inside the first electric push rod (402); The inflatable structure (5) comprises a first conduit (501) interconnected with the air pump inside the machine base (1); a second conduit (502) is installed on the upper end of the support plate (401); a third conduit (503) equal in number to the rectangular frame (3) is fixedly installed on the lower end of the second conduit (502); and a positioning seat (504) is fixedly sleeved on the outer side of the third conduit (503); An air nozzle (505) is fixedly mounted on the lower end of the positioning seat (504), and the air nozzle (505) and the third conduit (503) are communicated with each other. A rubber sleeve (506) is fixedly sleeved on the outer side of the air nozzle (505), and an instrument housing (6) is movably plugged into the lower end of the sleeve (403). The arc-shaped rubber pad (405) is tightly fitted with the outer wall of the threaded joint of the instrument housing (6), and the rubber sleeve (506) is tightly fitted with the inner wall of the threaded joint of the instrument housing (6); The support plate (401) and the outer side of the sleeve (403) are movably sleeved with a locking assembly (7), and the locking assembly (7) comprises two first gears (701) symmetrically mounted on the outer side of the sleeve (403); The outer side of the first electric push rod (402) is movably sleeved with a locking ring (703), and the outer side of the first gear (701) is respectively installed with a first rack (704) and a second rack (705) that mesh with each other, and the first rack (704) and the second rack (705) are distributed on both sides of the first gear (701), the connection between the first rack (704) and the support plate (401) is a fixed connection, and the connection between the second rack (705) and the locking ring (703) is a fixed connection, and a plurality of groups of balls (706) distributed equidistantly around the circumference are movably embedded on the inner wall of the locking ring (703), and the connection between the balls (706) and the sleeve (403) is a rolling connection.

2. The instrument sealing detection device according to claim 1, characterized in that: The second conduit (502) and the third conduit (503) are in communication with each other, and the third conduit (503) passes through the sleeve (403) and is connected to the sleeve (403) in a fixed manner.

3. The instrument sealing detection device according to claim 2, characterized in that: The connection between the positioning seat (504) and the sleeve (403) is a fixed connection, a rotary joint (507) is fixedly installed between the first conduit (501) and the second conduit (502), and the first conduit (501) is rotatably connected to the second conduit (502) via the rotary joint (507).

4. The instrument sealing detection device according to claim 1, characterized in that: A positioning shaft (702) is fixedly embedded in the center of the end face of one side of the first gear (701) facing the sleeve (403), a fixing seat is installed between the sleeve (403) and the first gear (701), and the connection between the fixing seat and the sleeve (403) is an integrally formed structure, and the positioning shaft (702) is rotatably connected to the fixing seat via a bearing.

5. The instrument sealing detection device according to claim 1, characterized in that: A blocking assembly (8) is installed inside the rectangular frame (3), and the blocking assembly (8) includes two symmetrically distributed blocking plates (801). Two symmetrically distributed mounting shafts (802) are fixedly installed on the outer sides of the blocking plates (801), and the blocking plates (801) are rotatably connected to the rectangular frame (3) through the mounting shafts (802). A coil spring (803) is fixedly sleeved on the outer side of the mounting shaft (802), and the coil spring (803) is located at one end of the outer side and is fixedly connected to the rectangular frame (3). Connecting shafts (804) are movably embedded at opposite ends of the blocking plates (801) at both ends. Rollers (805) are fixedly installed at both ends of the connecting shaft (804), and the connecting shaft (804) is rotatably connected to the blocking plates (801) through the rollers (805). The connection between the rollers (805) and the instrument housing (6), the first rack (704) and the second rack (705) is a rolling connection.

6. The instrument sealing detection device according to claim 3, characterized in that: A connecting assembly (9) is provided between the second electric push rod (10) and the support plate (401), the connecting assembly (9) comprising a hollow shaft (901) fixedly connected to the support plate (401), and the rotary joint (507) is installed inside the hollow shaft (901), the upper end of the second electric push rod (10) is fixedly connected to the support seat (902), and the hollow shaft (901) is rotatably connected to the support seat (902) via a bearing, the outer side of the hollow shaft (901) is located between the support plate (401) and the support seat (902) and is fixedly sleeved with a second gear (903), the outer side of the second gear (903) is installed with a third rack (11) meshing with it, and the connection between the third rack (11) and the machine base (1) is a fixed connection.

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