Bolt-free valve pressure testing machine

Abstract

The utility model relates to the technical field of engineering installation and application, in particular to a bolt-free valve pressure testing machine which comprises a chassis and a pressure testing assembly, the pressure testing assembly comprises a movable push disc, a sliding rail, two fixed push discs, a pressure testing component and an auxiliary component, the bottoms of the two fixed push discs are respectively connected with the chassis, and the sliding rail is arranged on the movable push disc. The two fixed push discs are oppositely located on the two sides of the chassis respectively, the sliding rail is located between the two fixed push discs, the movable push disc is located above the sliding rail, the pressure testing component is connected with the fixed push discs and the movable push disc respectively, and the auxiliary component is connected with the fixed push discs. The structure is simple, precise machining equipment is not needed, and the machining precision and the matching requirement are met; the number of required personnel is small, and assembling is easy; the fund demand amount is small; the practicability is high, and repeated use can be achieved.

Description

Technical Field

[0001] This utility model relates to the field of engineering installation and application technology, and in particular to a boltless valve pressure testing machine. Background Technology

[0002] In today's industrial era, the equipment manufacturing and installation industry is booming. Valves, as essential components in pipeline installation, are widely used in many fields such as chemical and pharmaceutical industries. Based on the actual installation situation of chemical pipelines, a single unit can contain hundreds, thousands, or even tens of thousands of valves. Among them, gate valves and ball valves are common, with DN25 and DN40 valves being the most prevalent in pharmaceutical and chemical installations. According to national standards, the sampling inspection rate for low-pressure valves is 20%, while the inspection rate for valves used for main pipeline shut-off is 100%.

[0003] Currently, valve testing primarily employs a primitive method: bolting the valves together for sealing tests. However, when a significant number of valves require shell and sealing tests, this traditional bolt-connection testing method—performing shell strength and sealing tests on each valve individually with bolts—results in a large amount of repetitive work, wasting considerable manpower and auxiliary materials, and resulting in low testing efficiency.

[0004] Therefore, traditional valve pressure testing methods can no longer meet the high requirements of modern industry for valve testing efficiency, and there is an urgent need for a more efficient, convenient and accurate valve pressure testing device. Utility Model Content

[0005] The purpose of this invention is to provide a boltless valve pressure testing machine, which aims to solve the problems of existing bolt connection testing methods that waste a lot of manpower and auxiliary materials and have low testing efficiency.

[0006] To achieve the above objectives, this utility model provides a boltless valve pressure testing machine, including a chassis and a pressure testing assembly;

[0007] The pressure testing assembly includes a movable push plate, a slide rail, a fixed push plate, a pressure testing component, and an auxiliary component. There are two fixed push plates, the bottoms of which are respectively connected to the chassis and are located opposite each other on both sides of the chassis. The slide rail is located between the two fixed push plates, and the movable push plate is located above the slide rail. The pressure testing component is connected to both the fixed push plate and the movable push plate, and the auxiliary component is connected to the fixed push plate.

[0008] The pressure testing component includes a small oil station and a hydraulic cylinder. The hydraulic cylinder is connected to one of the fixed push plates, and its output end is connected to the movable push plate. The small oil station is connected to the hydraulic cylinder.

[0009] The pressure testing component further comprises a medium pipeline, a medium inlet valve and a pressure gauge, the medium pipeline is connected with another fixed push disc, the medium inlet valve is connected with the medium pipeline, and the pressure gauge is connected with the medium pipeline.

[0010] The pressure testing component further comprises a pressure relief pipeline and a pressure relief valve, the pressure relief pipeline is connected with the movable push disc, and the pressure relief valve is connected with the pressure relief pipeline.

[0011] The auxiliary component comprises a balance pull rod and an adjusting nut, both ends of the balance pull rod are respectively penetrated through two fixed push discs, and the ends of the balance pull rod close to the fixed push discs are respectively threadedly connected with the adjusting nuts.

[0012] The auxiliary component further comprises an adjustable screw rod, the adjustable screw rod is connected with the bottom disc and located at the bottom of the slide rail.

[0013] The bolt-free valve pressure testing machine of the utility model, a plurality of groups of valves to be measured are arranged on the slide rail, the valve shaft center line is coincided with the hydraulic cylinder center line through the auxiliary component, the hydraulic oil station is started, the movable push disc is used to tightly press the valve group to another fixed push disc through the hydraulic cylinder, the medium inlet valve is opened, the medium is slowly introduced into the valve to be measured, the pressure relief valve is opened, the air in the chamber of the valve group to be tested is exhausted, and then the pressure relief valve is closed immediately, the medium pipeline is pressurized to the shell test pressure value, the medium inlet valve is closed, whether each valve has a leakage point, deformation and the like are observed, the pressure gauge is observed and data are recorded. The pressure relief valve is slowly opened, the medium pressure is reduced to the sealing test pressure data, the valve to be measured is closed from the movable end one by one, after the first valve is closed, the pressure relief valve is in the normal open state, the medium end pressure gauge stable pressure data are observed and recorded. The shell pressure test and the sealing test of the plurality of valves are completed. The structure is relatively simple, precise machining equipment is not needed, machining precision and matching requirements are not needed, the personnel requirement is small, assembly is simple, the fund requirement is small, practicality is high, and the bolt-free valve pressure testing machine can be repeatedly used. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to these drawings without the creative labor for the ordinary skilled in the art.

[0015] Fig. 1 It is the principle structure diagram of the bolt-free valve pressure testing machine of the utility model.

[0016] Fig. 2It is the top view of the slide rail of the utility model.

[0017] Fig. 3 It is the side view sectional structure diagram of the movable push disc of the utility model.

[0018] In the figure: 1 - base, 2 - movable push disc, 3 - slide rail, 4 - fixed push disc, 5 - hydraulic oil cylinder, 6 - small oil station, 7 - balance pull rod, 8 - medium pipeline, 9 - adjustable screw rod, 10 - pressure relief valve, 11 - medium inlet valve, 12 - pressure gauge, 13 - adjusting nut, 14 - pressure relief pipeline. DETAILED DESCRIPTION

[0019] The embodiments of the utility model are described in detail below, the examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the utility model, and cannot be understood as a limitation of the utility model.

[0020] Please refer to Figs. 1 to 3 , wherein, Fig. 1 It is the principle structure diagram of the bolt-free valve pressure testing machine of the utility model. Fig. 2 It is the top view of the slide rail 3 of the utility model. Fig. 3 It is the side view sectional structure diagram of the movable push disc 2 of the utility model.

[0021] The utility model provides a bolt-free valve pressure testing machine: including base 1 and pressure testing assembly, the pressure testing assembly includes movable push disc 2, slide rail 3, fixed push disc 4, pressure testing component and auxiliary component, the pressure testing component includes small oil station 6, hydraulic oil cylinder 5, medium pipeline 8, medium inlet valve 11, pressure gauge 12, pressure relief pipeline 14 and pressure relief valve 10, the auxiliary component includes balance pull rod 7, adjusting nut 13 and adjustable screw rod 9.

[0022] For this specific embodiment, the number of the fixed push disc 4 is two, the bottom of the two fixed push disc 4 is connected with the base 1 respectively and is located on both sides of the base 1 respectively, the slide rail 3 is located between the two fixed push disc 4, the movable push disc 2 is located above the slide rail 3, the pressure testing component is connected with the fixed push disc 4 and the movable push disc 2 respectively, and the auxiliary component is connected with the fixed push disc 4.

[0023] The hydraulic cylinder 5 is connected with one of the fixed push disc 4, and the output end is connected with the movable push disc 2, and the small oil station 6 is connected with the hydraulic cylinder 5. The medium pipeline 8 is connected with the other fixed push disc 4, the medium inlet valve 11 is connected with the medium pipeline 8, and the pressure gauge 12 is connected with the medium pipeline 8. The pressure relief pipeline 14 is connected with the movable push disc 2, and the pressure relief valve 10 is connected with the pressure relief pipeline 14.

[0024] Secondly, the two ends of the balance pull rod 7 are respectively penetrated through two fixed push discs 4, and the ends of the balance pull rod 7 close to the fixed push discs 4 are respectively threadedly connected with the adjusting nuts 13.

[0025] Meanwhile, the adjustable screw rod 9 is connected with the bottom disc 1 and located at the bottom of the slide rail 3.

[0026] Using the bolt-free valve pressure testing machine of the embodiment, when in use, the adjusting nuts 13 at the ends of the balance pull rod 7 are adjusted to moderate positions, so that the two fixed push discs 4 have a certain pre-tightening force;

[0027] The movable push disc 2 is assembled, and the movable push disc 2 includes two types of 100 and 150;

[0028] A plurality of valves to be tested are placed on the slide rail 3, and the hard sealing surface valves are spaced by gaskets, and the soft sealing surface valves are not spaced by gaskets, the valve shaft center line is coincided with the center line of the hydraulic cylinder 5 by adjusting the adjustable screw rod 9 of the slide rail 3 to control the height of the track, wherein the two ends of the slide rail 3 are provided with two adjustable screw rods 9, nuts are threadedly connected on the adjustable screw rods 9, the nuts are connected through a connecting plate, the connecting plate is fixed at the bottom of the slide rail 3, the height of the slide rail 3 is adjusted by rotating the adjustable screw rod 9 and moving the nuts up and down according to the screw principle;

[0029] The medium pipeline 8 of the test is connected on one of the fixed push discs 4, and the calibrated pressure gauge 12 is assembled, and whether the pressure gauge 12 is normal is checked;

[0030] The hydraulic oil station is started, the movable push disc 2 is pressed to the fixed push disc 4 connected with the medium pipeline by the hydraulic cylinder 5, so that the thrust reaches the pre-set pressure of the oil station, and the medium pipeline 8 is communicated with the valve;

[0031] All valves to be tested are in the open state, slowly open the medium inlet valve 11 door to slowly enter the medium into the valve to be tested, open the pressure relief valve 10 to exhaust the air in the chamber of the valve group to be tested, and then close immediately, pressurize the medium pipeline 8 to the shell test pressure value, close the medium inlet valve 11 door, observe whether there are leaks, deformation, etc. of each valve, then observe the pressure gauge 12 and record the data, wherein the pressure relief valve 10 is connected with the movable push plate 2 through the pressure relief pipeline 14 and communicates with the valve;

[0032] Slowly open the pressure relief valve 10 to reduce the medium pressure to the sealing test pressure data, close the valve to be tested from the movable end one by one, after the first valve is closed, the pressure relief valve 10 is in the open state, observe the pressure data of the medium end pressure gauge 12 and record;

[0033] At this point, the shell pressure test and sealing test of multiple valves are completed, open the pressure relief valve 10 to discharge the test medium, start the hydraulic oil station, retract the hydraulic oil cylinder 5 to retreat the movable push plate 2 to the starting position; wherein the hydraulic oil cylinder 5 type HOB80*250 can be matched with a set of various types of hydraulic oil stations or gas engineering stations, if there is no oil station condition, the pre-tightening force of the movable push plate 2 can also use M20 rectangular thread rod to push and compress. Applicable valve range: DN15-DN100. The structure is relatively simple, without the need for precise mechanical processing equipment, machining precision, matching requirements; the amount of personnel required is small, the assembly is simple; the amount of funds required is small; the practicality is relatively high, and it can be reused.

[0034] The above only discloses a preferred embodiment of the utility model, of course, cannot limit the scope of the utility model, and those skilled in the art can understand that all or part of the processes of the above embodiment are implemented, and equivalent changes are made according to the utility model claims, still belong to the range covered by the utility model.

Claims

1. A bolt-free valve pressure testing machine, comprising a chassis, characterized in that, it further comprises a pressure testing assembly; the pressure testing assembly comprises a movable push plate, a slide rail, two fixed push plates, a pressure testing component and an auxiliary component, the bottoms of the two fixed push plates are respectively connected with the chassis and are respectively located opposite to the two sides of the chassis, the slide rail is located between the two fixed push plates, the movable push plate is located above the slide rail, the pressure testing component is connected with the fixed push plates and the movable push plate respectively, and the auxiliary component is connected with the fixed push plates.

2. The bolt-free valve pressure testing machine according to claim 1, characterized in that, the pressure testing component comprises a small oil station and a hydraulic oil cylinder, the hydraulic oil cylinder is connected with one of the fixed push plates and has an output end connected with the movable push plate, and the small oil station is connected with the hydraulic oil cylinder.

3. The bolt-free valve pressure testing machine according to claim 2, characterized in that, the pressure testing component further comprises a medium pipeline, a medium inlet valve and a pressure gauge, the medium pipeline is connected with the other fixed push plate, the medium inlet valve is connected with the medium pipeline, and the pressure gauge is connected with the medium pipeline.

4. The bolt-free valve pressure testing machine according to claim 2, characterized in that, the pressure testing component further comprises a pressure relief pipeline and a pressure relief valve, the pressure relief pipeline is connected with the movable push plate, and the pressure relief valve is connected with the pressure relief pipeline.

5. The bolt-free valve pressure testing machine according to claim 1, characterized in that, the auxiliary component comprises a balance pull rod and an adjusting nut, the two ends of the balance pull rod respectively penetrate through the two fixed push plates, and the ends of the balance pull rod close to the fixed push plates are respectively threadedly connected with the adjusting nuts.

6. The bolt-free valve pressure testing machine according to claim 5, characterized in that, the auxiliary component further comprises an adjustable screw rod, the adjustable screw rod is connected with the chassis and is located at the bottom of the slide rail.

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