Piston type hydraulic safety mechanism detection device

Abstract

An embodiment of the utility model discloses a piston type hydraulic safety mechanism detection device which comprises a pressurizing tank, the pressurizing tank comprises a mounting cavity, an airtight cavity and a piston cavity, the airtight cavity and the piston cavity are oppositely formed in the bottom side of the mounting cavity, the mounting cavity is communicated with the airtight cavity, the airtight cavity is communicated with the piston cavity and provided with a clamping step, and an opening step is arranged at an opening of the mounting cavity; a first sealing ring is arranged on the opening step; the valve type airtight hole is formed in a side opening of the airtight cavity, and a second sealing ring is arranged between the valve type airtight hole and the side opening and used for being externally connected with an air source; the pressure gauge is communicated with the airtight cavity; one end of the piston assembly is arranged in the piston cavity, the other end of the piston assembly is connected with a hand wheel, a gasket, a gasket and a bushing are arranged outside the piston assembly in a sleeving mode, and the gasket and the gasket are sequentially arranged at the clamping step; and the pressing ring is arranged in the pressurizing tank and is used for pressing the safety mechanism to be detected at the opening step. And the detection efficiency and the detection accuracy are improved.

Description

Technical Field

[0001] The invention relates to the field of workpiece detection, and in particular to a piston type hydraulic safety mechanism detection device. Background Art

[0002] The insurance mechanism is a very important component of product development safety design. Its reliability is related to the orderly accessibility and reliability of product tasks, especially in multi-level structures. Therefore, it is necessary to monitor the performance of product insurance mechanisms during their service period.

[0003] At present, the safety inspection of products is limited to batch inspection before leaving the factory, joint inspection of the system during use, and the return of the whole machine to the factory for repair or replacement after fault location. The above safety measures are time-consuming and labor-intensive, which will lead to problems such as increased procurement costs or delays in immediate tasks.

[0004] There is currently no effective solution to the above problems in the prior art. Summary of the invention

[0005] In order to solve the above problems, the present invention provides a piston-type hydraulic safety mechanism detection device, which can be connected to the safety mechanism in forward and reverse directions to perform air tightness test and action performance test at a predetermined depth through external air source and water injection, thereby solving the problem of difficulty and inconvenience in testing the safety mechanism in the prior art.

[0006] To achieve the above-mentioned purpose, the present invention provides a piston-type hydraulic safety mechanism detection device, including: a pressurized tank, the pressurized tank includes an installation cavity and an airtight cavity and a piston cavity relatively opened on the bottom side of the installation cavity, the installation cavity is connected to the airtight cavity, the airtight cavity and the piston cavity are connected and are provided with a clamping step, an opening step is provided at the opening of the installation cavity, and a first sealing ring is provided on the opening step; a valve-type airtight hole, the valve-type airtight hole is provided at the side opening of the airtight cavity, and a second sealing ring is provided between the side opening for connecting to an external air source; a pressure gauge, the pressure gauge is connected to the airtight cavity; a piston assembly, one end of the piston assembly is provided in the piston cavity, and the other end is connected to a handwheel, and a gasket, a gasket and a liner are provided on the outer sleeve, and the gasket and the gasket are provided at the clamping step in sequence; a pressure ring, the pressure ring is provided in the pressurized tank, and is used to press the safety mechanism to be detected at the opening step.

[0007] Further optionally, the device also includes a connecting plate, which is used to connect to the top of the safety mechanism to be tested on one side and press against the opening step on the other side during pressure testing, and a third sealing ring is provided between the safety mechanism to be tested and the connecting plate.

[0008] Further optionally, the valve-type airtight hole includes: a base, a middle part of which is through-through, and the base is fixedly connected to the pressurized tank; a screw sleeve, one end of which passes through the through-cavity of the base, and the other end is clamped on a sealing step protruding from the inner wall of the base, and a fourth sealing ring is sleeved on the outer side of the screw sleeve, and the fourth sealing ring is pressed against the sealing step; a screw plug, which enters the screw sleeve from the outside of the base, and a fifth sealing ring is sleeved on the outer side of the screw plug, and the fifth sealing ring is pressed against the end of the screw sleeve; a back-tightening nut, which is connected to the part of the screw plug located on the outside of the base to fix the screw sleeve; a nut, which is connected to one end of the screw sleeve passing through the base, and a sealing gasket is provided inside the nut.

[0009] Further optionally, the base is fixedly connected to the pressurized tank via a screw group; the screw group includes screws and a sixth sealing ring.

[0010] Further optionally, the piston assembly includes: a screw rod, a nut and a piston rod are sequentially provided on the outer side of the screw rod near one end, and the screw passes through the piston rod and the nut in sequence to be connected to the screw rod; a first bearing, a bearing seat, a second bearing, a first nut and a second nut are sleeved on the outer side of the rod near the other end, and a pressure cover is also provided on the outer sides of the first bearing, the second bearing and the bearing seat.

[0011] Further optionally, the bottom of the pressurized tank is provided with a plurality of supporting feet.

[0012] Further optionally, the airtight chamber is provided with a high-pressure needle valve.

[0013] Further optionally, the pressurized tank is provided with two airtight chambers and two corresponding piston chambers.

[0014] Further optionally, a lifting ring is provided on the top of the pressurized tank.

[0015] Further optionally, the handwheel is a folding handwheel.

[0016] The above technical solution has the following beneficial effects: the device adopts a purely mechanical structure and piston mechanism movement principle, and a large depth pressure multi-cylinder compensation method. The structure is simple and classic, the functionality is good, the portability is convenient, and the guarantee mobility is strong. The efficiency of key component fault identification is improved, and the guarantee cost is reduced; the technical status is stable and reliable, and the detection effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a structural schematic diagram of the piston type hydraulic safety mechanism detection device provided by an embodiment of the present invention during airtightness detection;

[0019] Figure 2 It is a structural schematic diagram of the piston type hydraulic safety mechanism detection device provided by an embodiment of the present invention during pressurized detection;

[0020] Figure 3 is a schematic diagram of the structure of the valve-type airtight hole provided in an embodiment of the present invention;

[0021] Figure 4 is a structural schematic diagram of a piston assembly provided by an embodiment of the present invention;

[0022] Figure 5 It is a three-dimensional structural schematic diagram of a piston type hydraulic safety mechanism detection device provided in an embodiment of the present invention.

[0023] Figure numerals: 1-pressure ring; 2-pressure tank; 3-safety mechanism to be tested; 4-third sealing ring; 5-first sealing ring; 6-connecting plate; 7-pressure gauge; 8-valve-type airtight hole; 801-base; 802-screw plug; 803-screw sleeve; 804-fifth sealing ring; 805-fourth sealing ring; 806-tightening nut; 807-sealing pad; 808-screw assembly; 809-nut; 9-piston assembly Parts; 901-first nut; 902-second nut; 903-pressure cover; 904-second bearing; 905-bearing seat; 906-first bearing; 907-screw; 908-nut; 909-screw; 910-piston rod; 10-washer; 11-gasket; 12-bushing; 13-handwheel; 14-high-pressure needle valve; 15-second sealing ring; 16-support foot; 17-liquid; 18-lifting ring. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0025] In order to solve the problem that the safety mechanism in the prior art is difficult to detect, the embodiment of the present invention provides a piston type hydraulic safety mechanism detection device, such as Figure 1 , Figure 2 As shown, the device includes: a pressurized tank 2, the pressurized tank 2 includes a mounting cavity and an airtight cavity and a piston cavity oppositely opened at the bottom side of the mounting cavity, the mounting cavity is connected to the airtight cavity, the airtight cavity and the piston cavity are connected and are provided with a clamping step, an opening step is provided at the opening of the mounting cavity, and a first sealing ring 5 is provided on the opening step; a valve-type airtight hole 8, the valve-type airtight hole 8 is provided at the side opening of the airtight cavity, and a second sealing ring 15 is provided between the side opening for external air source; a pressure gauge 7, the pressure gauge 7 is connected to the airtight cavity; a piston assembly 9, one end of the piston assembly 9 is provided in the piston cavity, and the other end is connected to a hand wheel 13, and a gasket 11, a gasket 10 and a liner 12 are provided on the outer sleeve, and the gasket 11 and the gasket 10 are provided at the clamping step in sequence; a pressure ring 1, the pressure ring 1 is provided in the pressurized tank 2, and is used to press the safety mechanism 3 to be detected at the opening step.

[0026] like Figure 1 As shown, the device includes a pressurized tank 2, the top of which is open and connected to a vertically arranged installation cavity, and the two sides of the pressurized tank 2 near the bottom are also opened respectively, one side opening is connected to the airtight cavity, and the other side opening is connected to the piston cavity. Among them, an opening step is provided on the top of the installation cavity, and the installation cavity is connected to the airtight cavity through a hole. The airtight cavity and the piston cavity are arranged opposite to each other, and a clamping step also protrudes at the connection between the airtight cavity and the piston cavity.

[0027] A first sealing ring 5 is arranged at the opening step. Figure 1 As shown, the safety mechanism 3 to be tested is positively assembled into the installation cavity, the top fold of the safety mechanism is pressed tightly on the first sealing ring 5, the main body is located in the installation cavity, and the pressure ring 1 is pressed tightly on the fold of the safety mechanism 3 to be tested to fix the safety mechanism to be tested. Figure 2 As shown, when the action performance is tested under pressure, the safety mechanism 3 to be tested is reversed, the top folded edge is pressed against the opening step by the pressure ring 1, and the main body protrudes from the top opening of the pressurized tank 2. At this time, a proper amount of liquid 17 (water in this embodiment) is injected into the pressurized tank 2, and the piston assembly 9 is used to transmit the pressure characteristics, thereby realizing the established action performance test of the safety mechanism 3 to be tested.

[0028] Each airtight cavity is provided with a valve-type airtight hole 8 at the side opening thereof, and is connected to a pressure gauge 7. The valve-type airtight hole 8 can be connected to an external air source. During airtightness detection, the valve-type airtight hole 8 is connected to an external air source, and the pressure gauge 7 is observed until the air pressure reaches the target value, thereby detecting the airtightness of the safety mechanism 3 to be detected. A second sealing ring 15 is also provided between the valve-type airtight hole 8 and the side opening of the airtight cavity, thereby ensuring the airtightness during the inflation process.

[0029] The piston assembly 9 is partially arranged in the piston cavity, one end of which goes deep into the piston cavity and enters the connecting hole formed by the clamping step, and the other end is located outside the piston cavity and connected to the handwheel 13. The gasket 11, the washer 10 and the liner 12 are sequentially installed in the piston cavity, the gasket 11 is against the clamping step, and the washer 10 is against the outside of the gasket 11, and then the piston assembly 9 is put in, and the handwheel 13 can control the rotation of the piston.

[0030] As an optional embodiment, it also includes a connecting plate 6, which is used to connect to the top of the safety mechanism to be tested 3 on one side and press against the opening step on the other side during pressure testing. A third sealing ring 4 is provided between the safety mechanism to be tested 3 and the connecting plate 6.

[0031] like Figure 1 As shown, when checking air tightness, the safety mechanism 3 to be tested is installed upright, and its top folded edge is directly pressed by the pressing ring 1 at the opening step.

[0032] like Figure 2 As shown, during the action performance test, the safety mechanism 3 to be tested is reversed, and one side of its top folded edge is connected to a connecting plate 6, which is pressed tightly against the opening step. The pressure ring 1 is sleeved on the outside of the safety mechanism 3 to be tested, and the top folded edge of the safety mechanism 3 to be tested and the connecting plate 6 are pressed tightly against the opening step.

[0033] Furthermore, a third sealing ring 4 is provided between the connecting plate 6 and the safety mechanism to be detected 3 .

[0034] As an optional implementation, Figure 3 Schematic diagram of the structure of the valve-type airtight hole provided by the embodiment of the present invention. Figure 3 As shown, the valve-type airtight hole 8 comprises: a base 801, the middle part of the base 801 is through, and the base 801 is fixedly connected to the pressurized tank 2; a screw sleeve 803, one end of the screw sleeve 803 passes through the through cavity of the base 801, and the other end is clamped on the sealing step protruding from the inner wall of the base 801, and the outer side of the screw sleeve 803 is sleeved with a fourth sealing ring 805, and the fourth sealing ring 805 is pressed against the sealing step; a screw plug 802, the screw plug 802 is extended from the base The outer side of the seat 801 enters into the screw sleeve 803, and the outer side of the screw plug 802 is provided with a fifth sealing ring 804, and the fifth sealing ring 804 is pressed against the end of the screw sleeve 803; the back-tightening nut 806 is connected to the part of the screw plug 802 located on the outer side of the base 801 to fix the screw sleeve 803; the nut 809 is connected to the end of the screw sleeve 803 that passes through the base 801, and a sealing gasket 807 is provided inside the nut 809.

[0035] like Figure 3As shown, the valve-type airtight hole 8 includes a base 801 , a screw plug 802 , a screw sleeve 803 , a fourth sealing ring 805 , a fifth sealing ring 804 , a back-tightening nut 806 , a sealing gasket 807 , a screw assembly 808 and a nut 809 .

[0036] The screw sleeve 803 passes through the fifth sealing ring 804 and the base body and is tightened with a back-tightening nut 806. The screw plug 802 passes through the fourth sealing ring 805 and is tightened on the end of the screw sleeve 803. The sealing gasket 807 is arranged in the nut 809, which is tightened on the end of the screw sleeve 803. The middle part of the nut 809 is provided with an opening. The sealing gasket 807 is preferably made of rubber.

[0037] As an optional implementation, the base 801 is fixedly connected to the pressurized tank 2 via a screw group 808; the screw group 808 includes screws and a sixth sealing ring.

[0038] like Figure 3 As shown, the base 801 is fixedly connected to the pressurized tank 2 via a screw group 808 . There are multiple screw groups 808 . Each screw group 808 includes a screw and a sixth sealing ring. The screw 907 passes through the sixth sealing ring and is connected to the base 801 .

[0039] As an optional implementation, Figure 4 is a schematic diagram of the structure of the piston assembly 9 provided in an embodiment of the present invention, such as Figure 4 As shown, the piston assembly 9 includes: a screw rod 909, a nut 908 and a piston rod 910 are sequentially provided on the outer side of the screw rod 909 near one end, and a screw 907 passes through the piston rod 910 and the nut 908 in sequence to be connected to the screw rod 909; a first bearing 906, a bearing seat 905, a second bearing 904, a first nut 901 and a second nut 902 are sleeved on the outer side of the rod near the other end, and a pressure cover 903 is also provided on the outer sides of the first bearing 906, the second bearing 904 and the bearing seat 905.

[0040] like Figure 4 As shown, the piston assembly 9 includes a first nut 901 , a second nut 902 , a gland 903 , a first bearing 906 , a bearing seat 905 , a second bearing 904 , a screw 907 , a nut 908 , a screw rod 909 and a piston rod 910 .

[0041] Among them, the nut 908 and the piston rod 910 are installed on the screw 909 through the screw 907, and the first bearing 906, the bearing seat 905, the second bearing 904, the pressure cover 903, the second nut 902 and the first nut 901 are inserted in sequence on the left side of the screw 909.

[0042] As an optional implementation, a plurality of supporting legs 16 are provided at the bottom of the pressurized tank 2 .

[0043] like Figure 2As shown, a plurality of legs 16 are evenly arranged on the bottom of the pressurized tank 2 for supporting the entire pressurized tank 2 .

[0044] As an optional implementation, a high-pressure needle valve 14 is provided in the airtight chamber.

[0045] The airtight cavity is connected to a high-pressure needle valve 14 , which can adjust the air pressure inside the pressurized tank 2 .

[0046] As an optional implementation, Figure 5 is a schematic diagram of the three-dimensional structure of the piston type hydraulic safety mechanism detection device provided by an embodiment of the present invention, such as Figure 5 As shown, the pressurized tank 2 is provided with two airtight chambers and two corresponding piston chambers.

[0047] like Figure 5 As shown, two airtight chambers are arranged side by side on one side of the pressurized tank 2 near the bottom, and two piston chambers are arranged side by side on the opposite side. In the pressurized test, the liquid pressure transmission characteristic of the piston is utilized, and the multi-cylinder compensation method under large depth requirements is used to realize the test of the established action performance of the mechanism.

[0048] As an optional implementation, a lifting ring 18 is provided on the top of the pressurized tank 2 .

[0049] like Figure 5 As shown, a plurality of lifting rings 18 are provided on the top of the pressurized tank 2 to facilitate the lifting of the entire device.

[0050] As an optional implementation, the hand wheel 13 is a folding hand wheel 13 .

[0051] The hand wheel 13 is foldable, which is convenient for storage when not in use and avoids bumps during transportation.

[0052] The detection method for airtight test is as follows: When used for airtight test, check each installation part and sealing ring according to Figure 1 (Schematic diagram of the airtight structure of the insurance mechanism) requires that the insurance mechanism 3 be assembled. Open the air inlet (unscrew the screw plug 802 and the sealing gasket 804 at the position of the valve-type airtight hole 8), connect the external gas source, and the gas enters from the screw sleeve hole, gradually filling the entire sealed inner cavity of the pressurized tank 2. When the preset pressure value is reached, the air intake is stopped, and the gas pressure in the inner cavity acts on the rubber gasket 807 in the reverse direction, and the air inlet hole of the screw sleeve 803 is sealed (see Figure 1 ), the gas in the inner cavity of the pressurized tank 2 is kept under pressure for the required time, and the detection liquid is applied to the exposed part of the insurance mechanism 3, and the changes in the detection liquid are observed to determine the airtightness of the insurance mechanism 3.

[0053] The detection method for action detection is as follows: When used for action testing, check each installation part and sealing ring according to Figure 2, assemble all parts (except 1, 3, 4, 5, 6), inject a certain amount of water into the pressure tank 2, set the insurance mechanism 3 as required, install the first sealing ring 5, adapter plate 6, third sealing ring 4, insurance mechanism 3 in sequence, and fasten them in place with the pressure ring 1; shake the hand wheel 13 to pressurize the insurance mechanism 3, observe the pressure gauge 7, and when the pressure reaches the preset pressure value, stop shaking the hand wheel 13, the insurance mechanism 3 will act, test the output end signal, and there should be a corresponding signal output. When collecting reliability samples, the insurance mechanism 3 can be reset and the above steps can be repeated; when performing small batch acceptance tests, complete a set of operations, remove the insurance mechanism 3, repeat the above steps, set the pressure value according to the tested insurance mechanism 3, and a batch of inspections can complete different numbers of tests. After the detection task is completed, the high-pressure needle valve 14 should be opened to clean the liquid in the cavity for standby use.

[0054] The above technical solution has the following beneficial effects: the device adopts a purely mechanical structure and piston mechanism movement principle, and a large depth pressure multi-cylinder compensation method. The structure is simple and classic, the functionality is good, the portability is convenient, and the guarantee mobility is strong. The efficiency of key component fault identification is improved, and the guarantee cost is reduced; the technical status is stable and reliable, and the detection effect is good; and the problem of random guarantee difficulty of insurance institutions is solved.

[0055] The specific implementation methods of the above invention further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above content is only the specific implementation methods of the present invention and is not intended to limit the protection scope of the present invention. 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 piston type hydraulic safety mechanism detection device, characterized in that: include: A pressurized tank, the pressurized tank comprising a mounting cavity and an airtight cavity and a piston cavity oppositely opened at the bottom side of the mounting cavity, the mounting cavity is communicated with the airtight cavity, the airtight cavity and the piston cavity are communicated with each other and are provided with a clamping step, an opening step is provided at the opening of the mounting cavity, and a first sealing ring is provided on the opening step; A valve-type airtight hole, wherein the valve-type airtight hole is provided at a side opening of the airtight cavity, and a second sealing ring is provided between the valve-type airtight hole and the side opening for connecting to an external air source; A pressure gauge, the pressure gauge being in communication with the airtight cavity; A piston assembly, one end of which is arranged in the piston cavity, the other end of which is connected to a hand wheel, and an outer sleeve is provided with a gasket, a washer and a liner, and the gasket and the washer are arranged at the clamping step in sequence; A pressure ring is arranged in the pressurized tank and is used to press the safety mechanism to be detected against the opening step.

2. The piston type hydraulic safety mechanism detection device according to claim 1, characterized in that: It also includes a connecting plate, which is used to connect with the top of the safety mechanism to be tested on one side during pressure testing and press against the opening step on the other side. A third sealing ring is provided between the safety mechanism to be tested and the connecting plate.

3. The piston type hydraulic safety mechanism detection device according to claim 1, characterized in that: The valve-type airtight hole comprises: A base, the middle part of which is through-connected, and the base is fixedly connected to the pressurized tank; A screw sleeve, one end of which passes through the through cavity of the base, and the other end is clamped on a sealing step protruding from the inner wall of the base, and a fourth sealing ring is sleeved on the outer side of the screw sleeve, and the fourth sealing ring is pressed against the sealing step; A screw plug, the screw plug enters the screw sleeve from the outside of the base, a fifth sealing ring is sleeved on the outside of the screw plug, and the fifth sealing ring is pressed tightly on the end of the screw sleeve; A back-tightening nut, the back-tightening nut is connected to the portion of the screw plug located outside the base to fix the screw sleeve; A nut is connected to one end of the screw sleeve passing through the base, and a sealing gasket is arranged inside the nut.

4. The piston type hydraulic safety mechanism detection device according to claim 3 is characterized in that: The base is fixedly connected to the pressurized tank via a screw group; The screw assembly includes screws and a sixth sealing ring.

5. The piston type hydraulic safety mechanism detection device according to claim 1, characterized in that: The piston assembly comprises: A screw rod, wherein a nut and a piston rod are arranged on the outer side of the screw rod near one end, and a screw passes through the piston rod and the nut in sequence to be connected to the screw rod; The outer side of the rod close to the other end is sleeved with a first bearing, a bearing seat, a second bearing, a first nut and a second nut, and a pressure cover is also arranged on the outer sides of the first bearing, the second bearing and the bearing seat.

6. The piston type hydraulic safety mechanism detection device according to claim 1, characterized in that: The bottom of the pressurized tank is provided with a plurality of supporting feet.

7. The piston type hydraulic safety mechanism detection device according to claim 1, characterized in that: The airtight chamber is provided with a high-pressure needle valve.

8. The piston type hydraulic safety mechanism detection device according to claim 1, characterized in that: The pressurized tank is provided with two airtight chambers and two corresponding piston chambers.

9. The piston type hydraulic safety mechanism detection device according to claim 1, characterized in that: A lifting ring is arranged on the top of the pressurized tank.

10. The piston type hydraulic safety mechanism detection device according to claim 1, characterized in that: The hand wheel is a folding hand wheel.

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