CN111366311A - Air pressure detection device of recovery pressure reducing valve - Google Patents

Abstract

An air pressure detection device for a recovery pressure reducing valve belongs to the technical field of sealing performance detection facilities for structural parts. It includes a testing table, which is set on the floor of the pressure reducing valve testing site; the pressure reducing valve medium inlet port dynamic seal clamping mechanism is located on the upper side of the left end of the testing table, and the pressure reducing valve medium outlet static seal clamping mechanism is located in The right end of the testing table faces the upper side; the sliding guide mechanism of the movable seal pressing plate is connected between the dynamic seal clamping mechanism of the medium inlet of the pressure reducing valve and the static seal clamping mechanism of the medium outlet of the pressure reducing valve; the pressure maintenance display mechanism is in the corresponding The position on the right side of the static seal clamping mechanism of the medium outlet of the pressure reducing valve is arranged on the test table and is connected with the pipeline of the static seal clamping mechanism of the medium outlet of the pressure reducing valve, and the pressure generating mechanism is arranged below the test table and is connected with Pressure holding mechanism line connections. It meets the requirements of external leakage and internal leakage detection; the structure is concise and the operation is convenient.

Description

Recovery pressure relief valve air pressure detection device

technical field

The invention belongs to the technical field of testing facilities for sealing performance of structural parts, and in particular relates to an air pressure detection device for a recovery pressure reducing valve.

Background technique

As known in the industry, the aforementioned pressure reducing valve is a valve that reduces the inlet pressure to a certain required outlet pressure through adjustment and automatically keeps the outlet pressure stable by relying on the energy of the medium itself. From the point of view of fluid mechanics, the pressure reducing valve is a throttling unit (ie, element) that can change the local resistance. By changing the throttling area, the flow rate and the kinetic energy of the fluid are changed, resulting in different pressure losses, so as to achieve a reduction in pressure. Purpose. That is to say, the pressure reducing valve adjusts the flow rate of the medium by controlling the opening degree of the opening and closing parts in the valve body, reduces the pressure of the medium, and at the same time adjusts the opening degree of the opening and closing parts with the help of the pressure behind the valve, so that the pressure behind the valve can be adjusted. stay within a certain range. The pressure reducing valve can be divided into: film type, spring film type, piston type, lever type and bellows type according to its structure, and so on.

As is known in the industry, all kinds of equipment with pressure reducing valves and pipelines for conveying various media need to be scrapped after a certain period of use. When the complete set of equipment or pipeline is scrapped, the pressure reducing valve is in good condition. The probability is relatively high, so if it is discarded without utilization, it will undoubtedly cause waste of resources, because the price of the pressure reducing valve is hundreds of yuan at low prices and tens of thousands of yuan at high prices. However, if the waste equipment or the pressure reducing valve on the pipeline are reused blindly, frequent failures will occur, resulting in the result that the gain outweighs the loss.

Furthermore, as is known in the industry, the detection of the pressure reducing valve mainly detects whether there is external leakage and/or internal leakage, and in the published Chinese patent documents, technical information on the tightness detection of the pressure reducing valve can be seen, typically such as The "relief valve detection device" recommended by CN103674450A has the advantage of a relatively simple structure, but does not give how to quickly hold and release the pressure relief valve under test in an automatic state, especially how to simultaneously check the pressure relief valve during the holding process. The technical enlightenment of implementing reliable sealing for the medium inlet and the medium outlet, and the technical solutions to be introduced below are generated under this background.

SUMMARY OF THE INVENTION

The task of the present invention is to provide a pressure reducing valve that is helpful to automatically and quickly hold and release the detected pressure reducing valve unloaded from the scrapped equipment and various pipelines, and can simultaneously guide the medium inlet and the medium in the holding state. The outlet is reliably sealed to meet the requirements of external leakage and internal leakage detection, which is conducive to the detection of the pressure reducing valve with loss of sealing and the selection of the pressure reducing valve with good sealing performance and the value of reuse, which can be avoided. The air pressure detection device of the recovery pressure reducing valve is blind and can reflect the saving of resources.

The task of the present invention is accomplished in this way, a recovery pressure relief valve air pressure detection device, comprising a detection table, the detection table is set on the floor of the pressure relief valve detection place in the use state; a pressure relief valve medium enters The port dynamic seal holding mechanism and a pressure reducing valve medium lead-out port static seal holding mechanism, the pressure reducing valve medium entering the port dynamic seal holding mechanism is arranged on the upper side of the left end of the testing platform, and the pressure reducing valve medium lead port static seal holding mechanism. The sealing clamping mechanism is arranged on the right side of the test table facing upward and corresponds to the dynamic sealing clamping mechanism of the pressure reducing valve medium inlet port; a movable sealing pressure plate sliding guide mechanism, the movable sealing pressure plate sliding guide mechanism is connected to the pressure reducing valve. The valve medium enters between the dynamic seal holding mechanism and the pressure reducing valve medium outlet static seal holding mechanism; a pressure maintaining display mechanism and a pressure generating mechanism, the pressure maintaining display mechanism is statically sealed corresponding to the pressure reducing valve medium leading port The position of the right side of the clamping mechanism is set on the test table and connected to the pipeline of the static seal clamping mechanism of the medium outlet of the pressure reducing valve, and the pressure generating mechanism is arranged below the test table and connected to the pipeline of the pressure maintaining mechanism.

In a specific embodiment of the present invention, the pressure reducing valve medium entry port dynamic seal clamping mechanism includes a working cylinder fixing seat, an acting cylinder, a movable sealing pressure plate and a pressure reducing valve medium entry port dynamic sealing gasket, The action cylinder fixing seat is fixed on the upper side of the left end of the detection table, the action cylinder is fixed with the left side of the action cylinder fixing seat in a lying state, and the action cylinder column of the action cylinder extends to the right side of the action cylinder fixing seat. On the left side, the middle part of the left side of the movable sealing platen is connected with the end of the action cylinder, and the upper and lower parts of the movable sealing platen are slidingly matched with the sliding guide mechanism of the movable sealing platen, and a pressure reducing valve is arranged on the upper part of the movable sealing platen. The internal leakage detection opening and closing valve, and a movable sealing pressure plate ventilation channel is provided on the movable sealing pressure plate. The gasket hole at the central position of the port-acting gasket is communicated, and the pressure-reducing valve medium enters the port-acting gasket and is embedded with the right side of the movable sealing plate, and in the state of use, the pressure-reducing valve medium enters the port-acting gasket. The right side is sealed and matched with the left side of the pressure reducing valve medium inlet of the pressure reducing valve medium inlet, and the sealing gasket hole is communicated with the pressure reducing valve medium inlet; the pressure reducing valve medium leads The outlet static seal holding mechanism is corresponding to the movable seal pressing plate; the pressure generating mechanism is arranged at the lower part of the right end of the testing platform in the state accompanied by the pressure maintaining and displaying mechanism.

In another specific embodiment of the present invention, the static seal clamping mechanism of the medium outlet of the pressure reducing valve includes a sealing disc fixing seat and a sealing disc, and the sealing disc fixing seat and the right end of the testing platform are facing upward. One side is fixed and corresponds to the right side of the movable pressure plate, a sealing disk fixing seat ventilation tube seat is formed on the right side of the sealing disk fixing seat, the sealing disk is embedded with the left side of the sealing disk fixing seat, and is in use In the state, the left side of the sealing disc is in sealing fit with the right side of the pressure reducing valve medium outlet of the pressure reducing valve medium outlet, and a ventilation pipe is provided at the central position of the ventilation pipe seat of the sealing disc fixing seat. The through hole of the vent tube seat corresponds to and communicates with the through hole of the sealing disk fixing seat opened on the sealing disk fixing seat, and the through hole of the sealing disk fixing seat communicates with the sealing disk opened at the central position of the sealing disk. The holes correspond to and communicate with each other, and the through hole of the sealing disc is communicated with the medium outlet of the pressure reducing valve; the sliding guide mechanism of the movable sealing pressure plate is connected between the fixing seat of the action cylinder and the fixing seat of the sealing disc; In the detection state of the pressure reducing valve, the pressure maintaining display mechanism is communicated with the medium outlet of the pressure reducing valve through the pipeline through the through hole of the vent pipe seat, the through hole of the sealing disc fixing seat and the through hole of the sealing disc in sequence; An electric controller is arranged on the upper part of the front side of the right end of the detection table, and the action cylinder and the pressure generating mechanism are electrically connected to the electric controller.

In yet another specific embodiment of the present invention, an action cylinder column connecting pin seat is formed on the left side of the movable sealing pressure plate and at a position corresponding to the end of the action cylinder column of the action cylinder, and the action cylinder The end of the column is connected with a connecting seat at the end of the working cylinder, and the connecting seat at the end of the working cylinder is connected with the connecting pin seat of the working cylinder through the connecting seat pin.

In yet another specific embodiment of the present invention, the leak detection opening and closing valve in the pressure reducing valve is a shut-off valve; a pressure reducing valve is formed on the right side of the movable sealing platen, and the medium inlet port dynamic sealing gasket is embedded The pressure reducing valve medium entry port dynamic seal is embedded with the pressure reducing valve medium entry port dynamic seal insert seat, and the pressure reducing valve medium entry port dynamic seal is a rubber gasket.

In still another specific embodiment of the present invention, a sealing disk embedding seat is formed on the left side of the sealing disk fixing seat, the sealing disk is embedded with the sealing disk embedding seat, and the sealing disk is Rubber sealing disc.

In a more specific embodiment of the present invention, the sliding guide mechanism of the movable sealing platen includes a pair of upper guide rods and a pair of lower guide rods, the pair of upper guide rods are parallel to each other front and rear, and the pair of upper guide rods are parallel to each other. The left end is fixedly connected with the upper part of the action cylinder fixing seat, and the right end is fixedly connected with the upper end of the sealing disc fixing seat. The left end of the rod is fixedly connected with the lower part of the action cylinder fixing seat, and the right end is fixedly connected with the lower part of the sealing disc fixing seat; the upper part and the lower part of the movable sealing platen and corresponding to a pair of upper guide rods and A pair of movable seal pressing plate sliding sleeves are arranged at the positions of the pair of lower guide rods respectively. The pressing plate sliding sleeve is slidingly matched with a pair of lower guide rods.

In a further specific embodiment of the present invention, the pressure maintaining display mechanism includes a pressure maintaining cylinder seat, a pressure maintaining cylinder, a pressure indicator, a first vent pipe I and a second vent pipe II, The pressure maintaining cylinder seat is fixed to the test table at a position corresponding to the right side of the sealing disc fixing seat, and a pressure maintaining cylinder connecting cavity is formed at the upper end of the pressure maintaining cylinder seat, on the right side of the pressure maintaining cylinder seat A first vent pipe fitting hole I is provided, and a second vent pipe fitting hole II is provided on the left side of the pressure maintaining cylinder base, the first vent pipe fitting hole I and the cylinder seat opened on the pressure maintaining cylinder base The first vent hole I communicates with the second vent pipe fitting hole II and the second vent hole II of the cylinder seat opened on the pressure maintaining cylinder base. The holding cylinder seat is fixed, and the upper end of the pressure maintaining cylinder extends upwards in the direction away from the pressure maintaining cylinder base and a cylinder cover is fixed. The two vent holes II communicate with each other, the pressure indicator is fixed on the cylinder cover and communicates with the pressure maintaining cylinder cavity, and one end of the first vent pipe I is matched with the pressure maintaining cylinder seat at a position corresponding to the first vent pipe fitting hole I It is connected and communicated with the first vent hole I of the cylinder seat, the other end is connected with the pressure generating mechanism, and an intake valve is provided on the pipeline of the first vent pipe I, and one end of the second vent pipe II At the position corresponding to the second vent tube fitting hole II, it is matched with the pressure maintaining cylinder seat and communicated with the second vent hole II of the cylinder seat, and the other end passes through the vent tube seat through hole and the sealing disc fixing seat in turn. The hole and the sealing disc pass through the hole and protrude into the pressure reducing valve medium outlet of the pressure reducing valve in the use state.

In yet another specific embodiment of the present invention, an inner thread of the connecting cavity wall of the pressure maintaining cylinder is provided on the cavity wall of the connecting cavity of the pressure maintaining cylinder, and an outer wall of the lower end of the pressure maintaining cylinder is provided with an inner thread of the connecting cavity wall of the pressure maintaining cylinder There are threads on the outer wall of the pressure maintaining cylinder, and the threads on the outer wall of the pressure maintaining cylinder are matched with the threads on the inner thread of the connecting cavity wall of the pressure maintaining cylinder; the pressure indicator is a pressure gauge; the pressure generating mechanism is an air compressor.

In a further specific embodiment of the present invention, a piston is provided in the pressure maintaining cylinder cavity of the pressure maintaining cylinder.

The technical effect of the technical solution provided by the present invention is that: because the pressure reducing valve medium can enter the port dynamic seal clamping mechanism and the pressure reducing valve medium outlet static seal clamping mechanism can cooperate with the pressure reducing valve medium outlet. The pressure reducing valve is automatically and quickly clamped and released, and in the clamped state, the medium inlet of the pressure reducing valve and the medium outlet of the pressure reducing valve can be reliably sealed at the same time, so it can meet the requirements of external leakage and internal leakage detection; Under the action of the pressure holding mechanism and the support of the pressure generating mechanism, it can help the inspectors to detect the pressure reducing valve with loss of sealing and select the pressure reducing valve with good sealing performance and value for reuse, which can avoid blindness. Because of its concise structure and convenient operation, it can be produced conveniently and reflect the low cost, and can also meet the operation requirements of ordinary inspectors.

Description of drawings

FIG. 1 is a schematic diagram of a first embodiment of the present invention.

FIG. 2 is a schematic diagram of a second embodiment of the present invention.

Detailed ways

In order to be able to understand the technical essence and beneficial effects of the present invention more clearly, the applicant will describe in detail below by way of examples, but the description of the examples is not intended to limit the solution of the present invention. Equivalent transformations that are only formal but not substantial should be regarded as the scope of the technical solutions of the present invention.

In the following description, all concepts related to the directionality or orientation of up, down, left, right, front and back are for the position of the drawings, and therefore should not be construed as providing the present invention. The special limitation of the technical solution.

Example 1:

Please refer to FIG. 1, which shows a test table 1, which is set on the floor of the pressure reducing valve testing place through the test table supporting feet or in a similar manner in the use state; a pressure reducing valve medium is shown. The inlet port dynamic seal clamping mechanism 2 and a pressure reducing valve medium lead-out port static seal clamping mechanism 3 are provided. The static seal clamping mechanism 3 of the medium outlet is arranged on the upward side of the right end of the testing table 1 and corresponds to the dynamic sealing clamping mechanism 2 of the medium inlet port of the pressure reducing valve; a movable sealing platen sliding guide mechanism 4 is shown, which is movable The sealing pressure plate sliding guide mechanism 4 is connected between the aforementioned pressure reducing valve medium inlet dynamic seal clamping mechanism 2 and the aforementioned pressure reducing valve medium outlet static seal clamping mechanism 3; a pressure maintaining display mechanism 5 and a pressure generating mechanism are shown. 6. The pressure maintaining display mechanism 5 is arranged on the aforementioned testing table 1 at a position corresponding to the right side of the pressure reducing valve medium outlet static seal clamping mechanism 3 and is connected to the pressure reducing valve medium outlet static seal clamping mechanism 3 in a pipeline, The pressure generating mechanism 6 is provided below the test table 1 and is connected to the pressure maintaining mechanism 5 in a pipeline.

Continuing with Fig. 1, the aforementioned pressure reducing valve medium entry port dynamic seal clamping mechanism 2 includes an action cylinder fixed seat 21, an action cylinder 22, a movable seal pressing plate 23 and a pressure relief valve medium entry port dynamic seal 24, the action cylinder The fixing seat 21 is fixed on the upper side of the left end of the aforementioned detection table 1 by the action cylinder fixing seat screw 211, and the action cylinder 22 is in a lying state, more specifically, in a horizontal cantilever state and is fixed to the left side of the action cylinder fixing seat 21 ( Through fasteners such as bolts), and the action cylinder 221 of the action cylinder 22 extends to the right side of the action cylinder fixing seat 21, the left middle part of the movable sealing platen 23 is connected with the end of the action cylinder column 221, and the movable sealing platen The upper part and the lower part of 23 are slidingly matched with the aforementioned movable sealing platen sliding guide mechanism 4, the upper part of the movable sealing platen 23 is equipped with a pressure reducing valve internal leakage detection opening and closing valve 231, and a movable sealing plate is provided on the movable sealing platen 23. The pressure plate ventilation channel 232, one end of the movable sealing pressure plate ventilation channel 232 is communicated with the leakage detection opening and closing valve 231 in the pressure reducing valve, and the other end is connected with the sealing gasket hole 241 opened at the central position of the pressure reducing valve medium entering the port dynamic sealing gasket 24 In the state of use, the pressure reducing valve medium enters the right side of the port dynamic sealing gasket 24 and the right side of the pressure reducing valve 7. The left side of the pressure reducing valve medium inlet port 71 is sealed and matched, and the aforementioned gasket hole 241 is communicated with the pressure reducing valve medium inlet port 71; the aforementioned pressure reducing valve medium outlet port static seal clamping mechanism 3 and The aforementioned movable sealing pressing plate 23 corresponds to the aforementioned; the aforementioned pressure generating mechanism 6 is provided at the lower part of the right end of the aforementioned testing table 1 in a state accompanied by the aforementioned pressure maintaining and displaying mechanism 5 .

Continuing with Fig. 1, the aforementioned pressure reducing valve medium outlet static seal clamping mechanism 3 includes a sealing disc fixing seat 31 and a sealing disc 32. The sealing disc fixing seat 31 is connected to the right end of the aforementioned testing table 1 through the sealing disc fixing seat screw 314. The upper side is fixed and corresponds to the right side of the aforementioned movable pressure plate 23 . A sealing disc fixing seat ventilation tube seat 311 is formed on the right side of the sealing disc fixing seat 31 . The sealing disc 32 and the left side of the sealing disc fixing seat 31 are formed. The left side of the sealing disc 32 is tightly fitted with the right side of the pressure-reducing valve medium outlet of the pressure-reducing valve medium outlet 72 of the pressure-reducing valve 7 in the state of use, and is connected to the aforementioned sealing disc fixing seat. A vent tube seat through hole 3111 is defined in the center of the trachea seat 311, and the vent tube seat through hole 3111 corresponds to and communicates with the sealing disk fixing seat through hole 312 opened on the sealing disk fixing seat 31, and the sealing disk fixing seat The through hole 312 corresponds to and communicates with the through hole 321 of the seal plate opened in the center of the seal plate 32 , and the through hole 321 of the seal plate communicates with the medium outlet 72 of the pressure reducing valve.

As shown in FIG. 1 , the aforementioned movable sealing platen sliding guide mechanism 4 is connected between the aforementioned action cylinder fixing seat 21 and the sealing disc fixing seat 31 ; in the detection state of the aforementioned pressure reducing valve 7 , the aforementioned pressure maintaining display mechanism 5 is composed of: The pipeline is communicated with the medium outlet 72 of the pressure reducing valve through the through hole 3111 of the vent tube seat, the through hole 312 of the sealing plate fixing seat and the through hole 321 of the sealing plate in sequence; an electrical control device is arranged on the upper part of the front side of the right end of the aforesaid detection table 1 The device 11 , the aforementioned action cylinder 22 and the aforementioned pressure generating mechanism 6 are electrically connected to the electrical controller 11 .

Continuing with FIG. 1 , on the left side of the aforementioned movable sealing platen 23 and at a position corresponding to the end of the action cylinder 221 of the aforementioned action cylinder 22 , there is an action cylinder connecting pin seat 233 , which is connected at the end of the action cylinder 221 . There is a connecting seat 2211 at the end of the working cylinder, and the connecting seat 2211 at the end of the working cylinder is connected with the connecting pin seat 233 of the working cylinder through the connecting seat pin 22111 .

In this embodiment, the aforementioned action cylinder 22 is an air cylinder, but if an oil cylinder is used instead of the air cylinder, it should be regarded as an equivalent technical means and still belongs to the technical connotation category disclosed in the present invention.

In this embodiment, the aforementioned on-off valve 231 for detecting leakage in the pressure reducing valve is a shut-off valve; on the right side of the aforementioned movable sealing platen 23, a pressure-reducing valve medium inlet port-moving sealing gasket embedding seat 234 is formed. The valve medium inlet port dynamic gasket 24 is embedded with the pressure reducing valve medium inlet port dynamic gasket embedding seat 234 and the pressure relief valve medium inlet port dynamic gasket 24 is a rubber gasket.

A sealing disc embedding seat 313 is formed on the left side of the sealing disc fixing seat 31 , the sealing disc 32 is embedded with the sealing disc embedding seat 313 , and the sealing disc 32 is a rubber sealing disc.

Continuing with FIG. 1 , the aforementioned movable sealing platen sliding guide mechanism 4 includes a pair of upper guide rods 41 and a pair of lower guide rods 42 . The upper part of the cylinder fixing seat 22 is fixedly connected and is defined by the left limiting nut 411 of the upper guide rod; The left ends of the pair of lower guide rods 42 are fixedly connected with the lower part of the aforementioned action cylinder fixing seat 22 and are defined by the left limit nut 421 of the lower guide rod, and the right end of the pair of lower guide rods is sealed with the aforementioned The lower part of the disk fixing seat 31 is fixedly connected and is defined by the right limiting nut 422 of the lower guide rod; a pair of upper guide rods 41 and a pair of lower guide rods 42 are provided on the upper part and the lower part of the aforementioned movable sealing platen 23 and respectively corresponding to a pair of upper guide rods 41 and a pair of lower guide rods 42 . For the movable sealing pressure plate sliding sleeves 235, the pair of movable sealing pressure plate sliding sleeves 235 located at the upper part of the movable sealing pressure plate 23 are slidably matched with the pair of upper guide rods 41, and the pair of movable sealing pressure plate sliding sleeves 235 located at the lower part of the movable sealing pressure plate 23 are in sliding cooperation with the pair of upper guide rods 41. A pair of lower guide rods 42 are slidably fitted.

Continuing with FIG. 1, the aforementioned pressure maintaining display mechanism 5 includes a pressure maintaining cylinder seat 51, a pressure maintaining cylinder 52, a pressure indicator 53, a first vent pipe I54 and a second vent pipe II 55. The pressure maintaining cylinder seat 51 is fixed to the aforementioned testing table 1 by screws at a position corresponding to the right side of the aforementioned sealing disc fixing seat 31 , and a pressure maintaining cylinder connecting cavity 511 is formed at the upper end of the pressure maintaining cylinder base 51 . A first vent pipe fitting hole I512 is provided on the right side, and a second vent pipe fitting hole II 513 is provided on the left side of the pressure maintaining cylinder base 51. The first vent pipe fitting hole I512 is connected to the pressure maintaining cylinder base 51. The first vent hole I514 of the upper cylinder seat is communicated with, the second vent pipe fitting hole II513 is communicated with the second vent hole II515 of the cylinder seat opened on the pressure maintaining cylinder base 51, and the lower end of the pressure maintaining cylinder 52 is corresponding to the pressure maintaining cylinder. The position of the connection cavity 511 is fixed with the pressure maintaining cylinder seat 51, while the upper end of the pressure maintaining cylinder 52 extends upwards in the direction away from the pressure maintaining cylinder base 51 and is fixed with a cylinder cover 521 in a screw-fixed manner. The cylinder cavity 522 communicates with the first ventilation hole I514 of the cylinder seat and the second ventilation hole II515 of the cylinder base. The pressure indicator 53 is fixed on the cylinder cover 521 and communicated with the pressure maintaining cylinder cavity 522. One end of the first ventilation pipe I54 is at The position corresponding to the first vent pipe fitting hole I512 is matched with the pressure maintaining cylinder base 51 and communicated with the aforementioned first vent hole I514 of the cylinder base, and the other end is connected with the aforementioned pressure generating mechanism 6, and in this first communication An intake valve 541 is provided on the pipeline of the air pipe I54, and one end of the second air pipe II 55 is matched with the pressure maintaining cylinder seat 51 at the position corresponding to the second air pipe fitting hole II 513 and is matched with the aforementioned second air hole of the cylinder seat. II515 communicate with each other, and the other end passes through the vent tube seat through hole 3111, the sealing disc fixing seat through hole 312 and the sealing disc through hole 321 in sequence, and penetrates into the pressure reducing valve medium outlet 72 of the pressure reducing valve 7 in the use state.

Since the other end of the second vent pipe II55 is connected to the pressure generating mechanism 6, the applicant's statement that the pressure generating mechanism 6 and the pressure maintaining and displaying mechanism 5 are connected by pipelines mentioned above is confirmed.

In this embodiment, an inner thread (not marked with a reference number) is provided on the cavity wall of the aforementioned pressure maintaining cylinder connecting cavity 511 , and an outer wall of the lower end of the aforementioned pressure maintaining cylinder 52 is provided with The outer wall thread of the pressure maintaining cylinder (not marked with reference numerals), the outer wall thread of the pressure maintaining cylinder is matched with the inner thread thread of the connecting cavity wall of the pressure maintaining cylinder; the aforementioned pressure indicator 53 is a pressure gauge, which is convenient and intuitive for the inspector. Check whether the pressure indication value changes; the aforementioned pressure generating mechanism 6 is an air compressor and is electrically connected to the aforementioned electrical controller 11, and the aforementioned action cylinder 22 is also electrically connected to the electrical controller 11. The valve on the pipeline connected to the cylinder 33 is electrically connected to the electrical controller 11 .

When the pressure reducing valve 7 shown in FIG. 1 is to be disassembled from the scrapped and used equipment and/or various types of pipelines and is to be screened and tested for whether the sealing is intact or not, the inspector will map the pressure reducing valve 7 to Between the movable sealing pressure plate 23 and the sealing disc fixing seat 31, specifically, the pressure reducing valve medium inlet 71 of the pressure reducing valve 7 corresponds to the sliding guide mechanism 4 of the moving sealing pressure plate, and the pressure reducing valve medium is guided. The right side of the outlet 72 is in contact with the left side of the aforementioned sealing disc 32 . Then, the inspector operates the corresponding button 111 on the electrical controller 11 to make the action cylinder 22 work, and the action cylinder column 221 extends to the outside of the cylinder, that is, to the right. Since the end of the action cylinder column 221 is connected to the movable sealing platen 23, In addition, because the movable sealing pressure plate 23 is slidingly matched with the pair of upper guide rods 41 and the pair of lower guide rods 42, the movable sealing pressure plate 23 and the pressure reducing valve medium entering the port dynamic sealing gasket 24 are displaced to the right by the action cylinder 221, reducing the pressure. The right side of the pressure valve medium inlet port dynamic seal 24 faces the left side of the pressure relief valve medium inlet port 71 of the pressure relief valve 7 and seals, and at the same time, the left side of the sealing disc 32 faces the pressure relief valve medium guide. The right side of the outlet 72 is sealed, and the pressure reducing valve 7 is in a reliable clamping state.

When the pressure reducing valve 7 is in the above-mentioned reliable clamping state, both the pressure reducing valve medium inlet port 71 and the pressure reducing valve medium outlet port 72 are in a sealed state, that is, the pressure reducing valve medium enters the port-dynamic sealing gasket 24 and the sealing disc respectively. 32 in the sealed state. The external leakage and internal leakage detection of the pressure reducing valve 7. The external leakage detection is performed first, specifically: the inspector opens the intake valve 541, and the pressure air provided by the pressure generating mechanism 6, that is, the compressed air or the compressed air generating mechanism (in this embodiment, the "air compressor") passes through the pressure generating mechanism 6 in turn. The first vent pipe 54, the intake valve 541 and the first vent hole I514 of the cylinder seat enter the pressure maintaining cylinder cavity 522, and the pressure of the pressurized air entering the pressure maintaining cylinder cavity 522 is revealed by the pointer of the pressure indicator 53 and then passes through the cylinder seat in turn. The second vent hole II515 and the second vent pipe II55 enter the medium outlet 72 of the pressure reducing valve. If there is leakage at the first outer sealing part I73 and/or the second outer sealing part II74 of the pressure reducing valve 7, then in a reasonable The pressure in the pressure-maintaining cylinder chamber 522 will decrease during the pressure time, such as 25-35 seconds. In this case, it can be determined that the pressure reducing valve 7 cannot be reused due to external leakage. If there is no external leakage after detection, then further detect whether there is internal leakage, specifically: the inspector opens the internal leakage detection opening and closing valve 231 of the pressure reducing valve. The pressure air in the medium outlet 72 of the pressure reducing valve will sequentially pass through the sealing part 75 in the pressure reducing valve, the medium inlet port 71 of the pressure reducing valve, the gasket hole 241 and the movable sealing platen air passage 232, and then pass through the leak detection in the pressure reducing valve. The closing valve 231 escapes to the outside, and the pressure in the pressure maintaining cylinder 522 drops and is indicated by the pressure indicator 53, then it is determined that the pressure reducing valve 7 has no external leakage, but cannot be reused due to internal leakage. It can be seen from the foregoing that the pressure reducing valve 7 can be recycled and reused only when there is neither external leakage nor internal leakage. After the detection is completed, the action cylinder 22 is operated in the reverse direction, the pressure reducing valve 7 is released after the detection is completed, and the above-mentioned detection is repeated for the next pressure reducing valve 7 to be detected.

In this embodiment, the term medium involved in the medium inlet port 71 of the pressure reducing valve and the medium outlet port 72 of the pressure reducing valve mainly refers to air or steam, but is not limited to air or steam. In addition, it can be seen from the schematic diagram of FIG. 1 that the pressure reducing valve 7 exemplified in this embodiment is a spring film type pressure reducing valve, but it is not absolutely limited to this type of pressure reducing valve. In addition, in addition to being used by the waste material recovery department, the present invention can also be applied to the monitoring and testing of the product quality by the pressure reducing valve manufacturer.

Example 2:

Referring to FIG. 1, a piston 5221 is provided in the pressure maintaining cylinder cavity 522 of the aforementioned pressure maintaining cylinder 52. In this case, the pressure maintaining cylinder cavity 522 is divided into an upper cavity located on the upper part of the piston 5221 and an upper cavity located at the upper part of the piston 5221 by the piston 5221. lower chamber. When the pressure reducing valve 7 is detected in the manner of Example 1, the piston 5221 will move upward due to the entry of pressurized air into the lower chamber located at the lower part of the piston 5221, so that the pressures in the upper and lower chambers are kept in balance, the detection is completed, and the pressure is released in the lower chamber down, the pressure in the upper chamber will cause the piston 5221 to go down, so that the pressures in the upper and lower chambers remain in a balanced state. The rest are the same as the description of Example 1.

To sum up, the technical solution provided by the present invention makes up for the shortcomings in the prior art, successfully completes the invention task, and faithfully realizes the technical effect stated in the above technical effect column by the applicant.

Claims (10)

1. A recovery pressure reducing valve air pressure detection device is characterized in that it comprises a detection platform (1), and this detection platform (1) is arranged on the floor of the pressure reducing valve detection place under the condition of use; a pressure reducing valve medium The inlet dynamic seal clamping mechanism (2) and a static seal clamping mechanism (3) at the medium outlet of the pressure reducing valve, the pressure reducing valve medium entering the port dynamic sealing clamping mechanism (2) is arranged on the left end of the detection table (1) toward the left end. the upward side, and the pressure reducing valve medium outlet static seal clamping mechanism (3) is arranged on the upward side of the right end of the testing table (1) and corresponds to the pressure reducing valve medium inlet port dynamic sealing clamping mechanism (2) A sliding guide mechanism (4) for a movable sealing platen, the sliding guiding mechanism (4) for the movable sealing platen is connected to the dynamic sealing clamping mechanism (2) of the medium inlet of the pressure reducing valve and the static sealing of the medium outlet of the pressure reducing valve Between the clamping mechanisms (3); a pressure maintaining display mechanism (5) and a pressure generating mechanism (6), the pressure maintaining display mechanism (5) is located on the right side of the static seal clamping mechanism (3) corresponding to the medium outlet of the pressure reducing valve. The side position is arranged on the detection table (1) and is connected with the pipeline of the static seal clamping mechanism (3) of the medium outlet of the pressure reducing valve, and the pressure generating mechanism (6) is arranged under the detection table (1) and is connected with the pressure Keep the mechanism (5) pipeline connected. 2. The air pressure detection device for a recovery pressure reducing valve according to claim 1, characterized in that the pressure reducing valve medium inlet port dynamic seal clamping mechanism (2) comprises an action cylinder fixing seat (21), an action cylinder (22) ), a movable sealing pressure plate (23) and a pressure reducing valve medium entering the port movable sealing gasket (24), the action cylinder fixing seat (21) is fixed on the left end of the test table (1) facing upwards, the action cylinder (22) It is fixed to the left side of the action cylinder fixing seat (21) in a lying state, and the action cylinder column (221) of the action cylinder (22) extends to the right side of the action cylinder fixing seat (21), and the movable sealing pressing plate The left middle part of (23) is connected with the end of the action cylinder (221), and the upper and lower parts of the movable sealing pressure plate (23) are slidingly matched with the sliding guide mechanism (4) of the movable sealing pressure plate. 23) is equipped with a pressure reducing valve internal leakage detection opening and closing valve (231), and a movable sealing pressure plate ventilation channel (232) is provided on the movable sealing pressure plate (23), and the movable sealing pressure plate ventilation channel (232) is One end is communicated with the opening and closing valve (231) for leak detection in the pressure reducing valve, and the other end is communicated with the gasket hole (241) opened at the center of the pressure reducing valve medium entering the port-dynamic seal (24), while the pressure reducing valve medium The inlet port seal (24) is embedded with the right side of the movable sealing plate (23), and the pressure reducing valve medium enters the right side of the port seal (24) and the pressure reducing valve (7) in the state of use. The left side of the pressure reducing valve medium inlet port (71) of the pressure reducing valve medium inlet port is sealed and matched, and the sealing gasket hole (241) is communicated with the pressure reducing valve medium inlet port (71); the pressure reducing valve The medium outlet static seal holding mechanism (3) corresponds to the movable seal pressing plate (23); the pressure generating mechanism (6) is arranged in the state accompanying the pressure maintaining display mechanism (5) The lower part of the right end of the inspection table (1). 3. The air pressure detection device for a recovery pressure reducing valve according to claim 2, characterized in that the pressure reducing valve medium outlet static seal clamping mechanism (3) comprises a sealing disc holder (31) and a sealing disc (31). 32), the sealing disc fixing seat (31) is fixed to the upward side of the right end of the testing table (1) and corresponds to the right side of the movable pressing plate (23), in the sealing disc fixing seat (31) The right side constitutes a sealing disc fixing seat ventilation tube seat (311), the sealing disc (32) is embedded with the left side of the sealing disc fixing seat (31), and the left side of the sealing disc (32) is in use. In sealing cooperation with the right side of the pressure reducing valve medium lead-out port (72) of the pressure reducing valve medium lead-out port (72) of the pressure reducing valve (7), a vent pipe is provided at the central position of the vent pipe seat (311) of the sealing disc fixing seat A seat through hole (3111), the ventilation tube seat through hole (3111) corresponds to and communicates with a sealing disk fixing seat through hole (312) opened on the sealing disk fixing seat (31), and the sealing disk fixing seat through hole (311) (312) corresponds to and communicates with a sealing disc through hole (321) opened at the central position of the sealing disc (32), and the sealing disc through hole (321) communicates with the pressure reducing valve medium outlet (72); The movable sealing pressure plate sliding guide mechanism (4) is connected between the action cylinder fixing seat (21) and the sealing disc fixing seat (31); in the detection state of the pressure reducing valve (7), the The pressure maintaining display mechanism (5) is connected to the pressure reducing valve medium lead-out port ( 72) communicate with each other; an electrical controller (11) is arranged on the upper part of the front side of the right end of the detection table (1), and the action cylinder (22) and the pressure generating mechanism (6) are connected with the electrical controller (11). 11) Electrical control connections. 4. The air pressure detection device for a recovery pressure reducing valve according to claim 2, characterized in that it is on the left side of the movable sealing platen (23) and on the action cylinder (221) corresponding to the action cylinder (22) The position of the end of the action cylinder column is formed with an action cylinder column connecting pin seat (233), the end of the action cylinder column (221) is connected with an action cylinder column end connection seat (2211), and the action cylinder column end connection seat (2211) is connected by The seat pin shaft (22111) is connected with the action cylinder column connecting pin shaft seat (233). 5. The air pressure detection device for a recovery pressure reducing valve according to claim 2, characterized in that the leak detection opening and closing valve (231) in the pressure reducing valve is a stop valve; A pressure-reducing valve medium enters the port-moving gasket embedding seat (234) on the side, and the pressure-reducing valve medium enters the port-moving gasket (24) and the pressure-reducing valve medium enters the port-moving gasket embedding seat (234). Embedded and the pressure reducing valve medium enters the port dynamic sealing gasket (24) is a rubber gasket. 6. The air pressure detection device for a recovery pressure reducing valve according to claim 3, characterized in that a sealing disc embedding seat (313) is formed on the left side of the sealing disc fixing seat (31), and the sealing disc (32) ) and the sealing disc embedding seat (313), and the sealing disc (32) is a rubber sealing disc. 7 . The air pressure detection device for a recovery pressure reducing valve according to claim 3 , wherein the movable sealing platen sliding guide mechanism ( 4 ) comprises a pair of upper guide rods ( 41 ) and a pair of lower guide rods ( 42 ). 8 . , a pair of upper guide rods (41) are parallel to each other front and rear and the left end of the pair of upper guide rods (41) is fixedly connected with the upper part of the action cylinder fixing seat (22), and the right end is fixedly connected with the sealing disc fixing seat (31) The upper ends of the lower guide rods (42) are fixedly connected to each other, and the pair of lower guide rods (42) are parallel to each other and correspond to the bottom of the pair of upper guide rods (41). The lower part of the movable sealing plate (23) is fixedly connected, and the right end is fixedly connected with the lower part of the sealing disc fixing seat (31). A pair of movable sealing pressing plate sliding sleeves (235) are respectively provided at the positions of the lower guide rods (42), and a pair of movable sealing pressing plate sliding sleeves (235) and a pair of upper guide rods (41) are located on the upper part of the movable sealing pressing plate (23). A pair of movable sealing pressing plate sliding sleeves (235) located at the lower part of the movable sealing pressing plate (23) are slidingly fitted with a pair of lower guide rods (42). 8. The recovery pressure reducing valve air pressure detection device according to claim 3, characterized in that the pressure maintaining display mechanism (5) comprises a pressure maintaining cylinder seat (51), a pressure maintaining cylinder (52), a pressure maintaining Indicator (53), a first vent pipe I (54) and a second vent pipe II (55), the pressure maintaining cylinder seat (51) is at a position corresponding to the right side of the sealing disc fixing seat (31) It is fixed with the test table (1), and a pressure maintaining cylinder connecting cavity (511) is formed at the upper end of the pressure maintaining cylinder seat (51), and a first ventilation pipe is provided on the right side of the pressure maintaining cylinder base (51). The matching hole I (512), and a second vent pipe matching hole II (513) is opened on the left side of the pressure maintaining cylinder base (51), and the first vent pipe matching hole I (512) and the opening in the pressure maintaining The first vent hole I (514) of the cylinder seat on the cylinder seat (51) communicates with the second vent pipe fitting hole II (513) and the second vent hole II ( 515) communicated, the lower end of the pressure maintaining cylinder (52) is fixed with the pressure maintaining cylinder seat (51) at a position corresponding to the pressure maintaining cylinder connecting cavity (511), and the upper end of the pressure maintaining cylinder (52) faces away from the pressure maintaining cylinder The direction of the seat (51) extends upward and a cylinder cover (521) is fixed. The pressure maintaining cylinder cavity (522) of the pressure maintaining cylinder (52) communicates with the first ventilation hole I (514) of the cylinder base and the second ventilation hole of the cylinder base. The air hole II (515) communicates with the pressure indicator (53), which is fixed on the cylinder cover (521) and communicates with the pressure maintaining cylinder cavity (522). The position of the trachea fitting hole I (512) is matched with the pressure maintaining cylinder seat (51) and communicated with the first vent hole I (514) of the cylinder seat, and the other end is connected with the pressure generating mechanism (6) , and an intake valve (541) is provided on the pipeline of the first vent pipe I (54), and one end of the second vent pipe II (55) is at a position corresponding to the second vent pipe fitting hole II (513) It is mated with the pressure maintaining cylinder seat (51) and communicated with the second ventilation hole II (515) of the cylinder seat, and the other end passes through the ventilation tube seat through hole (3111) and the sealing disc fixing seat through hole (312) in sequence. and the through hole (321) of the sealing disc and probe into the pressure reducing valve medium outlet (72) of the pressure reducing valve (7) in the use state. 9. The air pressure detection device for a recovery pressure reducing valve according to claim 8, characterized in that an inner thread of the connecting cavity wall of the pressure maintaining cylinder is provided on the cavity wall of the pressure maintaining cylinder connecting cavity (511), and in the The outer wall of the lower end of the pressure maintaining cylinder (52) is provided with the outer wall thread of the pressure maintaining cylinder, and the outer wall thread of the pressure maintaining cylinder is matched with the inner thread thread of the connecting cavity wall of the pressure maintaining cylinder; the pressure indicator (53) is a pressure gauge ; The pressure generating mechanism (6) is an air compressor. 10 . The air pressure detection device for a recovery pressure reducing valve according to claim 8 , wherein a piston ( 5221 ) is provided in the pressure maintaining cylinder cavity ( 522 ) of the pressure maintaining cylinder ( 52 ). 11 .

Images