CN111366311B - Air pressure detection device of recovery pressure reducing valve - Google Patents
Air pressure detection device of recovery pressure reducing valve Download PDFInfo
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- CN111366311B CN111366311B CN202010207077.1A CN202010207077A CN111366311B CN 111366311 B CN111366311 B CN 111366311B CN 202010207077 A CN202010207077 A CN 202010207077A CN 111366311 B CN111366311 B CN 111366311B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2876—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for valves
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Abstract
A pressure detection device for a recovery pressure reducing valve belongs to the technical field of structural member sealing performance detection facilities. Comprises a detection platform which is arranged on a terrace of a pressure reducing valve detection place; the pressure reducing valve medium inlet dynamic seal clamping mechanism is arranged on the upward side of the left end of the detection platform, and the pressure reducing valve medium outlet static seal clamping mechanism is arranged on the upward side of the right end of the detection platform; the movable sealing pressure plate sliding guide mechanism is connected between the dynamic sealing clamping mechanism of the medium inlet of the pressure reducing valve and the static sealing clamping mechanism of the medium outlet of the pressure reducing valve; the pressure maintaining display mechanism is arranged on the detection table at a position corresponding to the right side of the static sealing clamping mechanism of the medium leading-out port of the pressure reducing valve and is connected with the static sealing clamping mechanism of the medium leading-out port of the pressure reducing valve through a pipeline, and the pressure generating mechanism is arranged below the detection table and is connected with the pressure maintaining display mechanism through a pipeline. The requirements for detecting external leakage and internal leakage are met; simple structure and convenient operation.
Description
Technical Field
The invention belongs to the technical field of structural member sealing performance detection facilities, and particularly relates to an air pressure detection device for a recovery pressure reducing valve.
Background
As is known in the art, the pressure reducing valve is a valve that automatically stabilizes the outlet pressure by adjusting the inlet pressure to a desired outlet pressure and relying on the energy of the medium itself. From the viewpoint of fluid mechanics, the pressure reducing valve is a throttling unit (i.e. element) that can change local resistance, and by changing the throttling area, the flow rate and the kinetic energy of the fluid are changed, resulting in different pressure losses, thereby achieving the purpose of pressure reduction. That is, the pressure reducing valve reduces the pressure of the medium by controlling the opening degree of the opening/closing member in the valve body to adjust the flow rate of the medium, and maintains the post-valve pressure within a certain range by adjusting the opening degree of the opening/closing member by the action of the post-valve pressure. The pressure reducing valve can be divided into the following structural forms: membrane, spring membrane, piston, lever, bellows, etc.
As is also known in the art, various devices with pressure reducing valves and pipelines for conveying various media need to be discarded after a certain age, that is, after the age of the device is reached, the pressure reducing valves are relatively high in probability of being intact when the complete set of devices or pipelines are discarded, so that if the devices or pipelines are discarded without being used, resource waste is undoubtedly caused, and the cost of the pressure reducing valves is hundreds of yuan, and thousands of yuan. However, if the pressure reducing valve on the waste equipment or pipeline is reused blindly, frequent failures occur, resulting in irreparable results.
Further, as known in the art, the detection of the pressure reducing valve mainly detects whether there is an external leak and/or an internal leak, and technical information for detecting the sealing performance of the pressure reducing valve can be found in published chinese patent documents, and a typical "pressure reducing valve detection device" recommended by CN103674450A has the advantage of relatively simple structure, but does not provide a technology how to rapidly clamp and release the pressure reducing valve to be tested in an automatic state, particularly how to reliably seal a medium inlet and a medium outlet of the pressure reducing valve simultaneously during clamping, and the technical solutions to be described below are made in this context.
Disclosure of Invention
The invention aims to provide a pressure detection device for a recovery pressure reducing valve, which is beneficial to automatically and quickly clamping and releasing the pressure reducing valve to be detected which is unloaded from scrapped equipment and various pipelines, can simultaneously and reliably seal a medium inlet and a medium outlet of the pressure reducing valve in a clamped state so as to meet the requirements of detecting external leakage and internal leakage, is beneficial to detecting the pressure reducing valve with lost sealing property and selecting the pressure reducing valve with intact sealing property and recycling value, can avoid blindness and embody the resource saving property.
The task of the invention is completed in such a way that the air pressure detection device of the recovery pressure reducing valve comprises a detection platform, wherein the detection platform is arranged on a terrace of a detection place of the pressure reducing valve in a use state; the pressure reducing valve medium inlet dynamic seal clamping mechanism is arranged on one upward side of the left end of the detection table, and the pressure reducing valve medium outlet static seal clamping mechanism is arranged on one upward side of the right end of the detection table and corresponds to the pressure reducing valve medium inlet dynamic seal clamping mechanism; the movable sealing pressure plate sliding guide mechanism is connected between the dynamic sealing clamping mechanism of the medium inlet of the pressure reducing valve and the static sealing clamping mechanism of the medium outlet of the pressure reducing valve; the pressure maintaining display mechanism is arranged on the detection platform at a position corresponding to the right side of the static sealing clamping mechanism of the medium leading-out port of the pressure reducing valve and is connected with the static sealing clamping mechanism of the medium leading-out port of the pressure reducing valve through a pipeline, and the pressure generating mechanism is arranged below the detection platform and is connected with the pressure maintaining display mechanism through a pipeline.
In a specific embodiment of the invention, the pressure reducing valve medium inlet dynamic seal clamping mechanism comprises an action cylinder fixing seat, an action cylinder, a movable seal pressing plate and a pressure reducing valve medium inlet dynamic seal gasket, the action cylinder fixing seat is fixed on one side of the detection platform with the left end facing upwards, the action cylinder is fixed with the left side of the action cylinder fixing seat in a horizontal state, an action cylinder column of the action cylinder extends to the right side of the action cylinder fixing seat, the middle part of the left side of the movable seal pressing plate is connected with the tail end of the action cylinder column, the upper part and the lower part of the movable seal pressing plate are in sliding fit with the movable seal pressing plate sliding guide mechanism, the upper part of the movable seal pressing plate is provided with a pressure reducing valve internal leakage detection open-close valve, a movable seal pressing plate air duct is arranged on the movable seal pressing plate, one end of the movable seal pressing plate air duct is communicated with the pressure reducing valve, the other end of the pressure reducing valve medium inlet dynamic sealing gasket is communicated with a sealing gasket hole arranged in the center of a pressure reducing valve medium inlet dynamic sealing gasket, the pressure reducing valve medium inlet dynamic sealing gasket is fixedly embedded with the right side of the movable sealing pressing plate, the right side surface of the pressure reducing valve medium inlet dynamic sealing gasket is in sealing fit with the left side surface of a pressure reducing valve medium inlet of a pressure reducing valve in a use state, and the sealing gasket hole is communicated with the pressure reducing valve medium inlet; the static sealing clamping mechanism of the medium leading-out port of the pressure reducing valve corresponds to the movable sealing pressure plate; the pressure generating mechanism is arranged at the lower part of the right end of the detection table under the state of accompanying the pressure maintaining and displaying mechanism.
In another specific embodiment of the invention, the static sealing and clamping mechanism for the medium outlet of the pressure reducing valve comprises a sealing disc fixing seat and a sealing disc, the sealing disc fixing seat is fixed with one side of the detection platform with the upward right end facing upwards and corresponds to the right side of the movable sealing pressure plate, a sealing disc fixing seat vent pipe seat is formed on the right side of the sealing disc fixing seat, the sealing disc is embedded and fixed with the left side of the sealing disc fixing seat, the left side surface of the sealing disc is in sealing fit with the right side surface of the medium outlet of the pressure reducing valve in a use state, a vent pipe seat through hole is formed in the center of the sealing disc fixing seat vent pipe seat, the vent pipe seat through hole corresponds to and is communicated with a sealing disc fixing seat through hole formed in the sealing disc fixing seat, and the sealing disc fixing seat through hole corresponds to and is communicated with a sealing disc through hole formed in the center of the sealing disc, the sealing disc through hole is communicated with the medium lead-out port of the pressure reducing valve; the movable sealing pressure plate sliding guide mechanism is connected between the acting cylinder fixing seat and the sealing disc fixing seat; under the state of detecting the pressure reducing valve, the pressure maintaining and displaying mechanism is communicated with a medium leading-out port of the pressure reducing valve through a pipeline sequentially through the vent pipe seat through hole, the sealing disc fixing seat through hole and the sealing disc through hole; an electric controller is arranged on the upper part of the front side of the right end of the detection table, and the acting cylinder and the pressure generating mechanism are electrically connected with the electric controller in a control mode.
In a further embodiment of the invention, an active cylinder rod coupling pin seat is formed on the left side of the movable sealing platen and at a position corresponding to the end of the active cylinder rod of the active cylinder, and an active cylinder rod end coupling seat is connected to the end of the active cylinder rod, and the active cylinder rod end coupling seat is connected to the active cylinder rod coupling pin seat through a coupling seat pin.
In yet another specific embodiment of the present invention, the leakage detection open/close valve in the pressure reducing valve is a stop valve; the right side of the movable sealing pressure plate is provided with a movable sealing gasket embedding seat for a medium inlet of the pressure reducing valve, the movable sealing gasket for the medium inlet of the pressure reducing valve is embedded and fixed with the movable sealing gasket embedding seat for the medium inlet of the pressure reducing valve, and the movable sealing gasket for the medium inlet of the pressure reducing valve is a rubber gasket.
In still another specific embodiment of the present invention, a seal-plate seating seat is formed on the left side of the seal-plate fixing seat, the seal plate is seated on the seal-plate seating seat, and the seal plate is a rubber seal plate.
In a more specific embodiment of the present invention, the movable seal platen sliding guide mechanism includes a pair of upper guide rods and a pair of lower guide rods, the pair of upper guide rods being parallel to each other in a front-rear direction and having left ends fixedly connected to the upper portion of the operating cylinder holder and right ends fixedly connected to the upper end of the seal plate holder, the pair of lower guide rods being parallel to each other in a front-rear direction and corresponding to a lower portion of the pair of upper guide rods, the left ends fixedly connected to the lower portion of the operating cylinder holder and the right ends fixedly connected to the lower portion of the seal plate holder; and the upper part and the lower part of the movable sealing pressure plate are respectively provided with a pair of movable sealing pressure plate sliding sleeves at positions corresponding to the pair of upper guide rods and the pair of lower guide rods, the pair of movable sealing pressure plate sliding sleeves positioned at the upper part of the movable sealing pressure plate are in sliding fit with the pair of upper guide rods, and the pair of movable sealing pressure plate sliding sleeves positioned at the lower part of the movable sealing pressure plate are in sliding fit with the pair of lower guide rods.
In a further specific embodiment of the present invention, the pressure holding display mechanism includes a pressure holding cylinder base, a pressure holding cylinder, a pressure indicator, a first vent pipe i and a second vent pipe ii, the pressure holding cylinder base is fixed to the test table at a position corresponding to the right side of the seal disk fixing base, and a pressure holding cylinder connection chamber is formed at the upper end of the pressure holding cylinder base, a first vent pipe fitting hole i is formed at the right side of the pressure holding cylinder base, and a second vent pipe fitting hole ii is formed at the left side of the pressure holding cylinder base, the first vent pipe fitting hole i communicates with a first vent hole i of the cylinder base formed on the pressure holding cylinder base, the second vent pipe fitting hole ii communicates with a second vent hole ii of the cylinder base formed on the pressure holding cylinder base, the lower end of the pressure holding cylinder is fixed to the pressure holding cylinder base at a position corresponding to the pressure holding cylinder connection chamber, the upper end of the pressure maintaining cylinder extends upwards in the direction away from the pressure maintaining cylinder seat and is fixedly provided with a cylinder cover, a pressure maintaining cylinder cavity of the pressure maintaining cylinder is communicated with a first vent hole I of the cylinder seat and a second vent hole II of the cylinder seat, a pressure indicator is fixed on the cylinder cover and is communicated with the pressure maintaining cylinder cavity, one end of a first vent pipe I is matched and connected with the pressure maintaining cylinder seat at a position corresponding to a first vent pipe matching hole I and is communicated with the first vent hole I of the cylinder seat, the other end of the first vent pipe I is connected with the pressure generating mechanism, an air inlet valve is arranged on a pipeline of the first vent pipe I, one end of a second vent pipe II is matched and connected with the pressure maintaining cylinder seat at a position corresponding to a second vent pipe matching hole II and is communicated with the second vent hole II of the cylinder seat, and the other end of the second vent pipe II sequentially penetrates through a vent pipe seat through hole, a sealing disc fixing seat through hole and a sealing disc through hole and penetrates into a medium outlet of the pressure reducing valve under the use state.
In a still more specific embodiment of the present invention, a pressure holding cylinder connecting cavity wall internal thread is provided on the cavity wall of the pressure holding cylinder connecting cavity, and a pressure holding cylinder outer wall thread is provided on the outer wall of the lower end of the pressure holding cylinder, the pressure holding cylinder outer wall thread is in threaded fit with the pressure holding cylinder connecting cavity wall internal thread; the pressure indicator is a pressure gauge; the pressure generating mechanism is an air compressor.
In yet another specific embodiment of the present invention, a piston is disposed within a pressure-holding cylinder chamber of the pressure-holding cylinder.
The technical scheme provided by the invention has the technical effects that: the medium inlet dynamic seal clamping mechanism of the pressure reducing valve can automatically and quickly clamp and release the pressure reducing valve to be detected, which is unloaded from scrapped equipment and a pipeline, under the coordination of the medium outlet static seal clamping mechanism of the pressure reducing valve, and can simultaneously implement reliable sealing on the medium inlet of the pressure reducing valve and the medium outlet of the pressure reducing valve in a clamping state, so that the requirements for detecting external leakage and internal leakage can be met; because the pressure reducing valve with the sealing loss can be detected by detection personnel under the action of the pressure maintaining and displaying mechanism and the support of the pressure generating mechanism, and the pressure reducing valve with the intact sealing and the recycling value can be selected, the blindness can be avoided, and the significance of saving resources can be reflected; the structure is simple and convenient to operate, so that the device can be conveniently manufactured, low in price and capable of meeting the operation requirements of common detection personnel.
Drawings
Fig. 1 is a schematic view of a first embodiment of the present invention.
Fig. 2 is a schematic view of a second embodiment of the present invention.
Detailed Description
In order to clearly understand the technical spirit and the advantages of the present invention, the applicant below describes in detail by way of example, but the description of the example is not intended to limit the technical scope of the present invention, and any equivalent changes made according to the present inventive concept, which are merely in form and not in material, should be considered as the technical scope of the present invention.
In the following description, any concept related to the directions or orientations of up, down, left, right, front and rear is given with respect to the position of the drawings, and thus should not be construed as particularly limiting the technical solution provided by the present invention.
Example 1:
referring to fig. 1, there is shown a test stand 1, which test stand 1 is disposed on a floor of a test site of a pressure reducing valve by a test stand support leg or the like in a use state; a pressure reducing valve medium inlet dynamic seal clamping mechanism 2 and a pressure reducing valve medium outlet static seal clamping mechanism 3 are shown, the pressure reducing valve medium inlet dynamic seal clamping mechanism 2 is arranged on the upward side of the left end of the detection platform 1, and the pressure reducing valve medium outlet static seal clamping mechanism 3 is arranged on the upward side of the right end of the detection platform 1 and corresponds to the pressure reducing valve medium inlet dynamic seal clamping mechanism 2; a movable sealing pressure plate sliding guide mechanism 4 is shown, and the movable sealing pressure plate sliding guide mechanism 4 is connected between the dynamic sealing clamping mechanism 2 of the medium inlet of the pressure reducing valve and the static sealing clamping mechanism 3 of the medium outlet of the pressure reducing valve; a pressure maintaining display mechanism 5 and a pressure generating mechanism 6 are shown, the pressure maintaining display mechanism 5 is arranged on the detection platform 1 at a position corresponding to the right side of the static sealing clamping mechanism 3 of the medium outlet of the pressure reducing valve and is connected with the static sealing clamping mechanism 3 of the medium outlet of the pressure reducing valve through a pipeline, and the pressure generating mechanism 6 is arranged below the detection platform 1 and is connected with the pressure maintaining display mechanism 5 through a pipeline.
Continuing to refer to fig. 1, the aforementioned pressure reducing valve medium inlet dynamic seal clamping mechanism 2 includes an acting cylinder fixing seat 21, an acting cylinder 22, a movable seal pressing plate 23 and a pressure reducing valve medium inlet dynamic seal gasket 24, the acting cylinder fixing seat 21 is fixed on the upward side of the left end of the aforementioned detection table 1 by an acting cylinder fixing seat screw 211, the acting cylinder 22 is fixed with the left side of the acting cylinder fixing seat 21 in a horizontal state, more specifically, in a horizontal cantilever state (by a fastening member such as a bolt), and an acting cylinder column 221 of the acting cylinder 22 extends to the right side of the acting cylinder fixing seat 21, the left middle part of the movable seal pressing plate 23 is connected with the end of the acting cylinder column 221, and the upper part and the lower part of the movable seal pressing plate 23 are in sliding fit with the aforementioned movable seal pressing plate sliding guide mechanism 4, and a pressure reducing valve internal leakage detection opening and closing valve 231, a movable sealing pressure plate air passage 232 is arranged on the movable sealing pressure plate 23, one end of the movable sealing pressure plate air passage 232 is communicated with the leakage detection opening and closing valve 231 in the pressure reducing valve, the other end of the movable sealing pressure plate air passage 232 is communicated with a sealing gasket hole 241 arranged in the center of the dynamic sealing gasket 24 of the medium inlet of the pressure reducing valve, the dynamic sealing gasket 24 of the medium inlet of the pressure reducing valve is fixedly embedded with the right side of the movable sealing pressure plate 23, the right side surface of the dynamic sealing gasket 24 of the medium inlet of the pressure reducing valve is in sealing fit with the left side surface of the medium inlet of the pressure reducing valve 71 of the pressure reducing valve 7 in a use state, and meanwhile, the sealing gasket hole 241 is communicated with the medium inlet of the pressure reducing valve 71; the static sealing clamping mechanism 3 of the medium leading-out opening of the pressure reducing valve corresponds to the movable sealing pressure plate 23; the pressure generating means 6 is provided at the lower right end of the test table 1 in a state associated with the pressure holding display means 5.
Continuing to refer to fig. 1, the static sealing and clamping mechanism 3 of the pressure reducing valve medium outlet comprises a sealing disc fixing seat 31 and a sealing disc 32, the sealing disc fixing seat 31 is fixed with the upward side of the right end of the detection platform 1 through a sealing disc fixing seat screw 314 and corresponds to the right side of the movable sealing pressure plate 23, a sealing disc fixing seat vent pipe seat 311 is formed on the right side of the sealing disc fixing seat 31, the sealing disc 32 is embedded with the left side of the sealing disc fixing seat 31, in a use state, the left side surface of the sealing disc 32 is in sealing fit with the right side surface of the pressure reducing valve medium outlet 72 of the pressure reducing valve 7, a vent pipe seat through hole 3111 is formed in the center of the sealing disc fixing seat vent pipe seat 311, the vent pipe seat through hole 3111 corresponds to and communicates with the sealing disc fixing seat through hole 312 formed, and the seal-disk holder through-hole 312 corresponds to and communicates with a seal-disk through-hole 321 provided at the central position of the seal disk 32, and the seal-disk through-hole 321 communicates with the aforementioned pressure-reducing-valve-medium outlet 72.
As shown in fig. 1, the movable seal platen sliding guide mechanism 4 is connected between the working cylinder fixing seat 21 and the seal disk fixing seat 31; in the state of detecting the pressure reducing valve 7, the pressure maintaining and displaying mechanism 5 is communicated with the pressure reducing valve medium outlet 72 through the vent pipe seat through hole 3111, the sealing disc fixing seat through hole 312 and the sealing disc through hole 321 in sequence by a pipeline; an electric controller 11 is provided at the upper portion of the right end front side of the test table 1, and the working cylinder 22 and the pressure generating mechanism 6 are electrically connected to the electric controller 11.
Continuing to refer to fig. 1, an acting cylinder post connecting pin shaft seat 233 is formed on the left side of the movable sealing pressure plate 23 at a position corresponding to the end of the acting cylinder post 221 of the acting cylinder 22, an acting cylinder post end connecting seat 2211 is connected to the end of the acting cylinder post 221, and the acting cylinder post end connecting seat 2211 is connected to the acting cylinder post connecting pin shaft seat 233 through a connecting seat pin shaft 22111.
In the present embodiment, the acting cylinder 22 is a cylinder, but if a cylinder is used instead of the cylinder, it should be regarded as an equivalent technical means and still fall within the technical scope of the present disclosure.
In the present embodiment, the above-described in-pressure-reducing-valve leak detection open/close valve 231 is a shut-off valve; a pressure reducing valve medium inlet dynamic seal gasket embedding seat 234 is formed on the right side of the movable sealing pressure plate 23, the pressure reducing valve medium inlet dynamic seal gasket 24 is embedded and fixed with the pressure reducing valve medium inlet dynamic seal gasket embedding seat 234, and the pressure reducing valve medium inlet dynamic seal gasket 24 is a rubber gasket.
A seal plate seating seat 313 is formed on the left side of the seal plate holding seat 31, the seal plate 32 is fitted into the seal plate seating seat 313, and the seal plate 32 is a rubber seal plate.
Continuing to refer to fig. 1, the aforementioned movable seal platen sliding guide mechanism 4 includes a pair of upper guide rods 41 and a pair of lower guide rods 42, the pair of upper guide rods 41 being parallel to each other in the front-rear direction and the left ends of the pair of upper guide rods 41 being fixedly connected to the upper portion of the aforementioned operating cylinder holder 21 and being defined by an upper guide rod left defining nut 411, the right ends being fixedly connected to the upper end of the aforementioned seal platen holder 31 and being defined by an upper guide rod right defining nut 412, the pair of lower guide rods 42 being parallel to each other in the front-rear direction and corresponding to the lower side of the pair of upper guide rods 41, the left ends of the pair of lower guide rods 42 being fixedly connected to the lower portion of the aforementioned operating cylinder holder 21 and being defined by a lower guide rod left defining nut 421, and the right ends being fixedly connected to the lower portion of the aforementioned seal platen holder 31 and being defined by a lower guide rod right defining nut 422; a pair of movable seal presser sliding sleeves 235 are provided on the upper and lower portions of the movable seal presser 23 and respectively corresponding to the pair of upper guide rods 41 and the pair of lower guide rods 42, the pair of movable seal presser sliding sleeves 235 located on the upper portion of the movable seal presser 23 are slidably fitted to the pair of upper guide rods 41, and the pair of movable seal presser sliding sleeves 235 located on the lower portion of the movable seal presser 23 are slidably fitted to the pair of lower guide rods 42.
Continuing to refer to fig. 1, the aforementioned pressure holding display mechanism 5 comprises a pressure holding cylinder holder 51, a pressure holding cylinder 52, a pressure indicator 53, a first vent pipe i 54 and a second vent pipe ii 55, the pressure holding cylinder holder 51 is fixed to the inspection table 1 by screws at a position corresponding to the right side of the aforementioned seal disk fixing seat 31, and a pressure holding cylinder connection chamber 511 is formed at the upper end of the pressure holding cylinder holder 51, a first vent pipe coupling hole i 512 is formed at the right side of the pressure holding cylinder holder 51, a second vent pipe coupling hole ii 513 is formed at the left side of the pressure holding cylinder holder 51, the first vent pipe coupling hole i 512 communicates with a cylinder holder first vent hole i 514 formed in the pressure holding cylinder holder 51, the second vent pipe coupling hole ii 513 communicates with a cylinder holder second vent hole ii 515 formed in the pressure holding cylinder holder 51, the lower end of the pressure holding cylinder 52 communicates with the pressure holding cylinder holder 51 at a position corresponding to the pressure holding cylinder connection chamber 511 And the upper end of the pressure-retaining cylinder 52 extends upward in a direction away from the pressure-retaining cylinder base 51 and is screwed with a cylinder cover 521, the pressure-retaining cylinder chamber 522 of the pressure-retaining cylinder 52 communicates with the aforementioned cylinder base first vent hole i 514 and the cylinder base second vent hole ii 515, the pressure indicator 53 is fixed on the aforementioned cylinder cover 521 and communicates with the pressure-retaining cylinder chamber 522, one end of the first vent pipe i 54 is fitted to the pressure-retaining cylinder base 51 at a position corresponding to the first vent pipe fitting hole i 512 and communicates with the aforementioned cylinder base first vent hole i 514, the other end is connected to the aforementioned pressure generating mechanism 6, and an air intake valve 541 is provided on the pipe of the first vent pipe i 54, one end of the second vent pipe ii 55 is fitted to the pressure-retaining cylinder base 51 at a position corresponding to the second vent pipe fitting hole ii 513 and communicates with the aforementioned cylinder base second vent hole ii 515, the other end passes through the vent pipe holder through-hole 3111, the seal disc holder through-hole 312 and the seal disc through-hole 321 in this order and penetrates into the pressure reducing valve medium outlet 72 of the aforementioned pressure reducing valve 7 in the use state.
Since the other end of the second vent pipe ii 55 is connected to the pressure generating means 6, the applicant has verified that the pressure generating means 6 is connected to the pressure holding display means 5 through the pipe.
In this embodiment, a pressure-holding-cylinder connecting-chamber-wall internal thread (no reference numeral) is provided on the chamber wall of the pressure-holding-cylinder connecting chamber 511, and a pressure-holding-cylinder external-wall thread (no reference numeral) is provided on the external wall of the lower end of the pressure-holding cylinder 52, the pressure-holding-cylinder external-wall thread being screw-fitted to the pressure-holding-cylinder connecting-chamber-wall internal thread; the pressure indicator 53 is a pressure gauge, so that a tester can conveniently and intuitively check whether the pressure indication value changes; the pressure generating means 6 is an air compressor and is electrically connected to the electric controller 11, and the working cylinder 22 is also electrically connected to the electric controller 11, specifically, to the electric controller 11 by a valve on a pipe connected to the working cylinder 33.
When the pressure reducing valve 7 obtained by being detached from the discarded waste equipment and/or various pipelines illustrated in fig. 1 is to be subjected to the discrimination of whether the sealing performance is intact or not, a detector corresponds the pressure reducing valve 7 between the movable sealing pressure plate 23 and the sealing disc fixing seat 31, specifically, corresponds the pressure reducing valve medium inlet 71 of the pressure reducing valve 7 to the movable sealing pressure plate sliding guide mechanism 4, and brings the right side surface of the pressure reducing valve medium outlet 72 into contact with the left side surface of the sealing disc 32. Then, the tester operates the corresponding button 111 on the electric controller 11 to operate the working cylinder 22, the working cylinder column 221 extends outward of the cylinder body, i.e., extends rightward, the movable sealing plate 23 together with the pressure reducing valve medium inlet dynamic seal 24 is displaced rightward by the working cylinder column 221 due to the connection of the end of the working cylinder column 221 with the movable sealing plate 23 and the sliding engagement of the movable sealing plate 23 with the pair of upper guide rods 41 and the pair of lower guide rods 42, the right side of the pressure reducing valve medium inlet dynamic seal 24 is sealed against the left side of the pressure reducing valve medium inlet port 71 of the pressure reducing valve 7, and at the same time, the left side of the sealing plate 32 is sealed against the right side of the pressure reducing valve medium outlet port 72, so that the pressure reducing valve 7 is in a reliable clamping state.
In the above-described reliably clamped state of the pressure reducing valve 7, both the pressure reducing valve medium inlet 71 and the pressure reducing valve medium outlet 72 are in the sealed state, that is, are in the sealed state by the pressure reducing valve medium inlet dynamic seal 24 and seal disk 32, respectively. External leakage into the pressure reducing valve 7 and internal leakage detection. Firstly, carrying out external leakage detection, specifically: the detector opens the air inlet valve 541, the pressure air provided by the pressure generating mechanism 6, i.e. the pressure air or compressed air generating mechanism (in this embodiment, "air compressor"), sequentially enters the pressure maintaining cylinder chamber 522 through the first vent pipe 54, the air inlet valve 541 and the first seat vent hole i 514, the pressure of the pressure air entering the pressure maintaining cylinder chamber 522 is revealed by the pointer of the pressure indicator 53 and then sequentially enters the pressure reducing valve medium outlet 72 through the second seat vent hole ii 515 and the second vent pipe ii 55, if there is a leakage in the first outer sealing part i 73 and/or the second outer sealing part ii 74 of the pressure reducing valve 7, the pressure in the pressure maintaining cylinder chamber 522 will decrease within a reasonable pressure maintaining time, e.g. 25-35 seconds, and the degree of the decrease or the decrease value is revealed by the pointer of the pressure indicator 53. In this case, it can be determined that the pressure reducing valve 7 cannot be reused due to the presence of an external leak. If the external leakage does not exist through detection, whether the internal leakage exists is further detected, and specifically, the method comprises the following steps: when a detector opens the pressure reducing valve internal leakage detection open/close valve 231, if there is a leakage at the pressure reducing valve internal sealing portion 75, that is, at the valve portion, the pressure air in the pressure reducing valve medium outlet 72 will pass through the pressure reducing valve internal sealing portion 75, the pressure reducing valve medium inlet 71, the gasket hole 241 and the movable seal pressure plate air passage 232 in sequence and then escape to the outside through the pressure reducing valve internal leakage detection open/close valve 231, and the pressure in the pressure holding cylinder 522 is reduced and indicated by the pressure indicator 53, and it is determined that the pressure reducing valve 7 has no external leakage but cannot be reused due to the internal leakage. From the foregoing, it can be seen that: the pressure reducing valve 7 is recycled only when there is neither external nor internal leakage. After the detection is finished, the acting cylinder 22 is operated reversely, the pressure reducing valve 7 is released due to the completion of the detection, and the detection is repeated for the next pressure reducing valve 7 to be detected.
In the present embodiment, the term media referred to in the pressure reducing valve medium inlet 71 and the pressure reducing valve medium outlet 72 mainly refers to air or steam, but is not limited to air or steam. As can be seen from the schematic diagram of fig. 1, the pressure reducing valve 7 of the present embodiment is a spring film type pressure reducing valve, but is not limited to such a pressure reducing valve. In addition, the invention can be used by waste material recovery departments, and is also suitable for monitoring and detecting the product quality of pressure reducing valve manufacturers.
Example 2:
referring to fig. 1, a piston 5221 is provided in the pressure-holding cylinder chamber 522 of the aforementioned pressure-holding cylinder 52, and in this case, the pressure-holding cylinder chamber 522 is divided by the piston 5221 into an upper chamber located at the upper portion of the piston 5221 and a lower chamber located at the lower portion of the piston 5221. When the pressure reducing valve 7 is detected as in embodiment 1, the piston 5221 is moved upward by the pressurized air entering the lower chamber located below the piston 5221 to keep the pressures of the upper and lower chambers balanced, and when the pressure in the upper chamber is released, the piston 5221 is moved downward to keep the pressures of the upper and lower chambers balanced. The rest is the same as described in example 1.
In conclusion, the technical scheme provided by the invention overcomes the defects in the prior art, successfully completes the invention task and truly realizes the technical effects of the applicant in the technical effect column.
Claims (8)
1. The air pressure detection device for the recovery pressure reducing valve is characterized by comprising a detection table (1), wherein the detection table (1) is arranged on a terrace of a detection place of the pressure reducing valve in a use state; the pressure reducing valve medium inlet dynamic seal clamping mechanism (2) and the pressure reducing valve medium outlet static seal clamping mechanism (3) are arranged, the pressure reducing valve medium inlet dynamic seal clamping mechanism (2) is arranged on the upward side of the left end of the detection table (1), and the pressure reducing valve medium outlet static seal clamping mechanism (3) is arranged on the upward side of the right end of the detection table (1) and corresponds to the pressure reducing valve medium inlet dynamic seal clamping mechanism (2); the movable sealing pressure plate sliding guide mechanism (4) is connected between the pressure reducing valve medium inlet dynamic sealing clamping mechanism (2) and the pressure reducing valve medium outlet static sealing clamping mechanism (3); a pressure maintaining display mechanism (5) and a pressure generating mechanism (6), wherein the pressure maintaining display mechanism (5) is arranged on the detection platform (1) at a position corresponding to the right side of the static sealing clamping mechanism (3) of the medium outlet of the pressure reducing valve and is connected with the static sealing clamping mechanism (3) of the medium outlet of the pressure reducing valve through a pipeline, the pressure generating mechanism (6) is arranged below the detection platform (1) and is connected with the pressure maintaining display mechanism (5) through a pipeline, the dynamic sealing clamping mechanism (2) of the medium inlet of the pressure reducing valve comprises an action cylinder fixing seat (21), an action cylinder (22), a movable sealing pressing plate (23) and a dynamic sealing gasket (24) of the medium inlet of the pressure reducing valve, the action cylinder fixing seat (21) is fixed on the upward side of the left end of the detection platform (1), and the action cylinder (22) is fixed with the left side of the action cylinder fixing seat (21) in a horizontal state, and the acting cylinder column (221) of the acting cylinder (22) extends to the right side of the acting cylinder fixing seat (21), the middle part of the left side of the movable sealing pressure plate (23) is connected with the tail end of the acting cylinder column (221), the upper part and the lower part of the movable sealing pressure plate (23) are in sliding fit with the movable sealing pressure plate sliding guide mechanism (4), the upper part of the movable sealing pressure plate (23) is provided with a pressure reducing valve inner leakage detection open-close valve (231), a movable sealing pressure plate air channel (232) is arranged on the movable sealing pressure plate (23), one end of the movable sealing pressure plate air channel (232) is communicated with the pressure reducing valve inner leakage detection open-close valve (231), the other end of the movable sealing pressure plate air channel is communicated with a sealing gasket hole (241) arranged at the central position of a pressure reducing valve medium inlet dynamic sealing gasket (24), and the pressure reducing valve medium inlet dynamic sealing gasket (24) is fixedly embedded with the right side of the movable sealing pressure plate (23), in addition, under the using state, the right side surface of the dynamic sealing gasket (24) of the medium inlet of the pressure reducing valve is in sealing fit with the left side surface of the medium inlet of the pressure reducing valve (71) of the pressure reducing valve (7), and meanwhile, the sealing gasket hole (241) is communicated with the medium inlet (71) of the pressure reducing valve; the static sealing clamping mechanism (3) of the medium leading-out port of the pressure reducing valve corresponds to the movable sealing pressure plate (23); the pressure generating mechanism (6) is arranged at the lower part of the right end of the detection table (1) under the state accompanied with the pressure maintaining and displaying mechanism (5); the static sealing clamping mechanism (3) for the medium lead-out port of the pressure reducing valve comprises a sealing disc fixing seat (31) and a sealing disc (32), the sealing disc fixing seat (31) is fixed with one side, facing upwards, of the right end of the detection table (1) and corresponds to the right side of the movable sealing pressing plate (23), a sealing disc fixing seat vent pipe seat (311) is formed on the right side of the sealing disc fixing seat (31), the sealing disc (32) is fixedly embedded with the left side of the sealing disc fixing seat (31), the left side face of the sealing disc (32) is in sealing fit with the right side face of the medium lead-out port of the pressure reducing valve of the medium lead-out port (72) of the pressure reducing valve (7) in a use state, a vent pipe seat through hole (3111) is formed in the central position of the sealing disc fixing seat vent pipe seat (311), and the vent pipe seat through hole (3111) corresponds to and is communicated with the sealing disc fixing seat through hole (312) formed in the sealing disc fixing seat (31), the sealing disc fixing seat through hole (312) corresponds to and is communicated with a sealing disc through hole (321) formed in the central position of the sealing disc (32), and the sealing disc through hole (321) is communicated with the medium outlet (72) of the pressure reducing valve; the movable sealing pressure plate sliding guide mechanism (4) is connected between the acting cylinder fixing seat (21) and the sealing disc fixing seat (31); under the state of detecting the pressure reducing valve (7), the pressure maintaining and displaying mechanism (5) is communicated with a medium leading-out port (72) of the pressure reducing valve through a pipeline sequentially through the vent pipe seat through hole (3111), the sealing disc fixing seat through hole (312) and the sealing disc through hole (321); an electric controller (11) is arranged at the upper part of the front side of the right end of the detection table (1), and the acting cylinder (22) and the pressure generating mechanism (6) are electrically connected with the electric controller (11) in a control way.
2. The apparatus for detecting the air pressure of a recycling pressure reducing valve according to claim 1, wherein an acting cylinder post connecting pin shaft seat (233) is formed at a left side of the movable sealing pressure plate (23) and at a position corresponding to the end of the acting cylinder post (221) of the acting cylinder (22), an acting cylinder post end connecting seat (2211) is connected to the end of the acting cylinder post (221), and the acting cylinder post end connecting seat (2211) is connected to the acting cylinder post connecting pin shaft seat (233) through a connecting seat pin shaft (22111).
3. The recovery pressure reducing valve air pressure detection device according to claim 1, wherein the pressure reducing valve internal leakage detection open/close valve (231) is a stop valve; a dynamic sealing gasket embedding seat (234) of a medium inlet of the pressure reducing valve is formed on the right side of the movable sealing pressure plate (23), the dynamic sealing gasket (24) of the medium inlet of the pressure reducing valve is embedded and fixed with the dynamic sealing gasket embedding seat (234) of the medium inlet of the pressure reducing valve, and the dynamic sealing gasket (24) of the medium inlet of the pressure reducing valve is a rubber gasket.
4. The recovery pressure reducing valve air pressure detecting device according to claim 1, wherein a seal plate embedding seat (313) is formed on the left side of the seal plate fixing seat (31), the seal plate (32) is embedded in the seal plate embedding seat (313), and the seal plate (32) is a rubber seal plate.
5. The recovery pressure reducing valve air pressure detecting apparatus according to claim 1, wherein the movable seal pressure plate sliding guide mechanism (4) includes a pair of upper guide rods (41) and a pair of lower guide rods (42), the pair of upper guide rods (41) being parallel to each other in a front-rear direction and left ends of the pair of upper guide rods (41) being fixedly connected to an upper portion of the operating cylinder holder (21) and right ends thereof being fixedly connected to an upper end of the seal plate holder (31), the pair of lower guide rods (42) being parallel to each other in a front-rear direction and corresponding to a lower portion of the pair of upper guide rods (41), left ends of the pair of lower guide rods (42) being fixedly connected to a lower portion of the operating cylinder holder (21) and right ends thereof being fixedly connected to a lower portion of the seal plate holder (31); a pair of movable sealing pressure plate sliding sleeves (235) are respectively arranged at the upper part and the lower part of the movable sealing pressure plate (23) and at the positions corresponding to the pair of upper guide rods (41) and the pair of lower guide rods (42), the pair of movable sealing pressure plate sliding sleeves (235) positioned at the upper part of the movable sealing pressure plate (23) are in sliding fit with the pair of upper guide rods (41), and the pair of movable sealing pressure plate sliding sleeves (235) positioned at the lower part of the movable sealing pressure plate (23) are in sliding fit with the pair of lower guide rods (42).
6. The pressure detecting device for a recycle pressure reducing valve according to claim 1, wherein the pressure keeping display mechanism (5) comprises a pressure keeping cylinder holder (51), a pressure keeping cylinder (52), a pressure indicator (53), a first vent pipe I (54) and a second vent pipe II (55), the pressure keeping cylinder holder (51) is fixed to the detecting table (1) at a position corresponding to the right side of the seal disk fixing seat (31), a pressure keeping cylinder connection chamber (511) is formed at the upper end of the pressure keeping cylinder holder (51), a first vent pipe coupling hole I (512) is formed at the right side of the pressure keeping cylinder holder (51), a second vent pipe coupling hole II (513) is formed at the left side of the pressure keeping cylinder holder (51), the first vent pipe coupling hole I (512) communicates with a first vent hole I (514) of the cylinder holder formed on the pressure keeping cylinder holder (51), the second vent pipe matching hole II (513) is communicated with a cylinder seat second vent hole II (515) formed on the pressure maintaining cylinder seat (51), the lower end of the pressure maintaining cylinder (52) is fixed with the pressure maintaining cylinder seat (51) at the position corresponding to the pressure maintaining cylinder connecting cavity (511), the upper end of the pressure maintaining cylinder (52) extends upwards in the direction far away from the pressure maintaining cylinder seat (51) and is fixed with a cylinder cover (521), the pressure maintaining cylinder cavity (522) of the pressure maintaining cylinder (52) is communicated with the cylinder seat first vent hole I (514) and the cylinder seat second vent hole II (515), a pressure indicator (53) is fixed on the cylinder cover (521) and is communicated with the pressure maintaining cylinder cavity (522), one end of a first vent pipe I (54) is matched with the pressure maintaining cylinder seat (51) at the position corresponding to the first vent pipe matching hole I (512) and is communicated with the cylinder seat first vent hole I (514), the other end of the first vent pipe I (54) is connected with the pressure generating mechanism (6), an air inlet valve (541) is arranged on a pipeline of the first vent pipe I (54), one end of a second vent pipe II (55) is matched and connected with the pressure maintaining barrel base (51) at a position corresponding to a second vent pipe matching hole II (513) and is communicated with a barrel base second vent hole II (515), and the other end of the second vent pipe II (55) sequentially penetrates through a vent pipe base through hole (3111), a sealing disc fixing base through hole (312) and a sealing disc through hole (321) and is inserted into a pressure reducing valve medium outlet (72) of the pressure reducing valve (7) in a use state.
7. The apparatus for detecting the air pressure of a recovery and pressure reducing valve according to claim 6, wherein a pressure-maintaining cylinder connection chamber wall internal thread is provided on the chamber wall of the pressure-maintaining cylinder connection chamber (511), and a pressure-maintaining cylinder outer wall thread is provided on the outer wall of the lower end of the pressure-maintaining cylinder (52), the pressure-maintaining cylinder outer wall thread being screw-coupled to the pressure-maintaining cylinder connection chamber wall internal thread; the pressure indicator (53) is a pressure gauge; the pressure generating mechanism (6) is an air compressor.
8. The recovery pressure reducing valve pressure detecting device according to claim 6, wherein a piston (5221) is provided in the pressure-holding cylinder chamber (522) of the pressure-holding cylinder (52).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010207077.1A CN111366311B (en) | 2020-03-23 | 2020-03-23 | Air pressure detection device of recovery pressure reducing valve |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010207077.1A CN111366311B (en) | 2020-03-23 | 2020-03-23 | Air pressure detection device of recovery pressure reducing valve |
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| CN111366311B true CN111366311B (en) | 2021-08-31 |
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Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201637554U (en) * | 2010-01-18 | 2010-11-17 | 北京艾迪西暖通科技有限公司 | Leakage testing system for pressure reducing valve |
| CN201909703U (en) * | 2010-11-18 | 2011-07-27 | 应杰 | Testing device for reducing valve |
| CN202485903U (en) * | 2012-03-30 | 2012-10-10 | 卓旦春 | Valve clamping mechanism in large valve testing device |
| CN103674450A (en) * | 2013-12-09 | 2014-03-26 | 重庆智锐德科技有限公司 | Pressure reducing valve detecting device |
| CN204008027U (en) * | 2014-06-25 | 2014-12-10 | 福建闽机机械科技有限公司 | A kind of valve seal detects clamp system |
| CN205898391U (en) * | 2016-06-29 | 2017-01-18 | 武汉洪斯德汽车有限公司 | Relief pressure valve gas tightness detection device |
| CN106989871A (en) * | 2017-05-13 | 2017-07-28 | 山东益都阀门集团股份有限公司 | Valve pressure test device |
| CN206905983U (en) * | 2017-05-26 | 2018-01-19 | 中山市优梦自动化设备有限公司 | Pressure-reducing valve air-tightness detection device |
| CN108827564B (en) * | 2018-09-10 | 2024-02-09 | 陕西博菲特流体控制装备制造有限公司 | Valve two-way centre gripping test fixture |
| CN209326889U (en) * | 2019-01-11 | 2019-08-30 | 苏州舜治自动化机械设备有限公司 | A kind of pressure reducing valve sealing test device |
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