Valve block structure for direct push type sampling diaphragm pump

Abstract

The utility model discloses a valve block structure for a direct push type sampling diaphragm pump, which enables the diaphragm pump to be small in vibration and low in noise during working. The valve comprises a valve seat and a top cover, a concave communicating cavity is formed in the bottom of the valve seat, the concave communicating cavity is a part of a negative pressure cabin, and an air inlet and an air outlet which are concave in the radial direction are formed in the thickness area of the top cover; the top cover is arranged on the upper surface of the valve seat in a covering mode, an air inlet cabin and an air outlet cabin are formed after the top cover is arranged on the surface of the valve seat in a covering mode, and the lower surface, corresponding to the periphery of the air inlet cabin, of the top cover is tightly attached to the upper surface of the valve seat through a first sealing ring. The lower surface, corresponding to the periphery of the air outlet cabin, of the top cover is tightly attached to the upper surface of the valve seat through a second sealing ring, the radial inner end of the air inlet is communicated with the air inlet cabin, and the radial inner end of the air outlet is communicated with the air outlet cabin.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of diaphragm pump, specifically be a valve block structure for direct push type sampling diaphragm pump. BACKGROUND

[0002] In some special gas processing occasions, some gas flow is not strong, to further detect the composition of the gas, it needs to be sucked by the suction equipment, and then discharged to another container for detection. If the gas itself has a certain gas pressure and can flow by itself, if the gas pressure is small and insufficient to take out a certain amount for detection, a gas suction pump is needed for assistance.

[0003] At present, the gas suction pump at home and abroad has a diaphragm type, a piston type and the like, and a valve block is needed to circulate and replace the gas during the suction process. In the use process, due to the structure of the valve block, the vibration and noise generated are large, which is not suitable for some special occasions. The original reason is that the unreasonable setting of the one-way valve mechanism in the valve block leads to obvious vibration, so it is urgent to develop a valve block structure with low vibration for extracting gas. UTILITY MODEL CONTENTS

[0004] In view of the above problems, the utility model provides a valve block structure for direct push type sampling diaphragm pump, which makes the diaphragm pump vibrate and make noise when working.

[0005] A valve block structure for direct push type sampling diaphragm pump, characterized in that it comprises:

[0006] a valve seat, the bottom of the valve seat is provided with an inner recess communication cavity, the inner recess communication cavity is part of a negative pressure cabin,

[0007] and a top cover, the top cover is provided with a radial inner recess air inlet and air outlet on the thickness area;

[0008] the top cover is covered on the upper surface of the valve seat, the surface of the valve seat is formed with an air inlet cabin and an air outlet cabin after the top cover is covered, the lower surface of the top cover corresponding to the outer periphery of the air inlet cabin is tightly attached to the upper surface of the valve seat through a first sealing ring, the lower surface of the top cover corresponding to the outer periphery of the air outlet cabin is tightly attached to the upper surface of the valve seat through a second sealing ring, the radial inner end of the air inlet is communicated with the air inlet cabin, the radial inner end of the air outlet is communicated with the air outlet cabin, the inner recess communication cavity is provided with a first hole group communicated to the face area of the air inlet cabin, the first spring sheet is fixed at the face area of the inner recess communication cavity corresponding to the air inlet cabin, the face area of the first spring sheet covers the first hole group, the inner recess communication cavity is provided with a second hole group communicated to the face area of the air outlet cabin, and the second spring sheet group is fixed at the position of the upper surface of the valve seat corresponding to the air outlet cabin, and the face area of the second spring sheet group covers the second hole group.

[0009] It is further characterized in that:

[0010] The first hole group comprises two A holes, the face domain where the two A holes are located corresponds to the face domain of the first spring sheet, the arc cavity wall of the inner recess communication cavity is provided with a first inner recess groove, the upper surface of the first inner recess groove is a plane, and the first spring sheet is fixed in the first inner recess groove through a fastening screw;

[0011] The second hole group comprises six B holes, the second spring sheet group comprises three second spring sheets, the face domain where the six B holes are located corresponds to the corresponding face domain of the three second spring sheets, each two B holes are provided corresponding to a second spring sheet, the upper surface of the valve seat is provided with a second inner recess groove, the second inner recess groove is located directly below the air outlet chamber, the lower surface of the second inner recess groove is a plane, and the three second spring sheets are fixed in the second inner recess groove through fastening screws;

[0012] After the top cover is fixed on the upper surface of the valve seat, the top cover is fastened and connected through a center screw and outer circumferential screws of a ring cloth, so that the top cover is reliably connected to the valve seat;

[0013] The total area formed by the combination of the two A holes is equal to the total area formed by the combination of the six B holes.

[0014] After the structure of the utility model is adopted, when the diaphragm below the inner recess communication cavity of the valve seat moves downward, the air inlet forms negative pressure, at this time, the gas passes through the A hole, the gas opens the first spring sheet, when the diaphragm moves upward, the gas is compressed, the gas with a certain pressure after compression passes through the B hole, the gas opens the second spring sheet group and flows into the air outlet, so that the gas flow from the air inlet to the air outlet is realized, the circulation of the gas is realized, the diaphragm below is a straight push driving, and the equivalent structure is shown in Figure 1 The first spring sheet is equivalent to the first one-way valve 2, the second spring sheet group is equivalent to the second one-way valve 5, the air inlet is equivalent to the air inlet pipe 1, the air outlet is equivalent to the air outlet pipe 4, the diaphragm 3 below and the inner recess communication cavity of the valve seat combine to form a negative pressure chamber 6, the diaphragm 3 is connected with a connecting rod 7 below, the connecting rod 7 makes the valve block isolate and switch the gas through the internally arranged group of one-way valve mechanisms, is suitable for a straight push type sampling diaphragm pump, and makes the diaphragm pump vibrate and make noise when working. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the layout principle drawing of the utility model;

[0016] Figure 2 It is the structure sectional view of the utility model;

[0017] Figure 3 It is the top view of the valve seat of the utility model;

[0018] Figure 4 It is the plan view of the first spring sheet of the utility model;

[0019] Figure 5 It is the plan view of the second spring sheet group of the utility model;

[0020] The names corresponding to the serial numbers in the figure are as follows:

[0021] Air inlet pipe 1, first one-way valve 2, diaphragm 3, air outlet pipe 4, second one-way valve 5, negative pressure chamber 6, connecting rod 7;

[0022] Valve seat 10, inner concave communication cavity 11, first inner concave groove 12, second inner concave groove 13, top cover 20, air inlet 21, air outlet 22, air inlet chamber 23, air outlet chamber 24, first sealing ring 25, second sealing ring 26, first through hole group 30, A hole 31, first spring sheet 40, C hole 41, first fastening screw 42, second through hole group 50, B hole 51, second spring sheet group 60, second spring sheet 61, connecting block 62, D hole 63, second fastening screw 64, center screw 70, outer peripheral screw 80. DETAILED DESCRIPTION

[0023] A valve block structure for a direct-push type sampling diaphragm pump, see Figures 2-5 , which comprises a valve seat 10 and a top cover 20.

[0024] The bottom of the valve seat 10 is provided with an inner concave communication cavity 11, which is part of the negative pressure chamber,

[0025] The thickness area of the top cover 20 is provided with radially inner concave air inlets 21 and air outlets 22.

[0026] The top cover 20 is covered on the upper surface of the valve seat 10, and after being covered on the surface of the valve seat 10, the top cover 20 forms an air inlet chamber 23 and an air outlet chamber 24, the lower surface of the top cover 20 corresponding to the outer periphery of the air inlet chamber 23 is tightly attached to the upper surface of the valve seat 10 through the first sealing ring 25, the lower surface of the top cover 20 corresponding to the outer periphery of the air outlet chamber 24 is tightly attached to the upper surface of the valve seat 10 through the second sealing ring 26, the radially inner end of the air inlet 21 is communicated with the air inlet chamber 23, the radially inner end of the air outlet 22 is communicated with the air outlet chamber 24, the inner concave communication cavity 11 is provided with a first through hole group 30 communicated to the air inlet chamber 23, the inner concave communication cavity 11 is fixed with a first spring sheet 40 corresponding to the surface area position of the air inlet chamber 24, the surface area of the first spring sheet 40 covers the first through hole group 30, the inner concave communication cavity 11 is provided with a second through hole group 50 communicated to the air outlet chamber 24, and the air outlet chamber 24 is fixed with a second spring sheet group 60 corresponding to the upper surface position of the valve seat 10, and the surface area of the second spring sheet group 60 covers the second through hole group 50.

[0027] In specific implementation, the first through hole group 30 includes two A holes 31, and the face domain where the two A holes 31 are located corresponds to the face domain of the first spring sheet 40. The first spring sheet 40 is a waist-shaped spring sheet, and a first inner recess 12 is arranged on the arc-shaped cavity wall of the inner recess communication cavity 11. The upper surface of the first inner recess 12 is a plane, and the first spring sheet 40 is fixed in the first inner recess 12 through a first fastening screw 42. The fastening hole is a C hole 41 at the central position in the length direction of the first spring sheet 40.

[0028] The second through hole group 50 includes six B holes 51, and the second spring sheet group 60 includes three second spring sheets 61. Each second spring sheet 61 is a waist-shaped spring sheet, and the three second spring sheets 61 are formed as an integral piece through a connecting block 62. The face domain where the six B holes 51 are located corresponds to the corresponding face domain of the three second spring sheets 61. Every two B holes 51 are arranged corresponding to one second spring sheet 61. The upper surface of the valve seat 10 is provided with a second inner recess 13, and the second inner recess 13 is located directly below the air outlet chamber 24. The lower surface of the second inner recess 13 is a plane, and the three second spring sheets 61 are fixed in the second inner recess 13 through a second fastening screw 64. The fastening hole of the second spring sheet 61 is a D hole 63 at the central position in the length direction of the second spring sheet 40.

[0029] In specific implementation, after the top cover 20 is fixed on the upper surface of the valve seat 10, the top cover 20 is fastened and connected through the central screw 70 and the outer peripheral screw 80 of the ring cloth, so as to ensure that the top cover 20 is reliably connected with the valve seat 10.

[0030] In specific implementation, the total area formed by the combination of the two A holes 31 is equal to the total area formed by the combination of the six B holes 51.

[0031] The working principle is as follows: when the diaphragm located below the inner recess communication cavity of the valve seat moves downward, the air inlet forms a negative pressure. At this time, the gas passes through the A hole, and the gas opens the first spring sheet. When the diaphragm moves upward, the gas is compressed, and the compressed gas with a certain pressure passes through the B hole, and the gas opens the second spring sheet group and flows into the air outlet. In this way, the gas flows from the air inlet to the air outlet, realizes the circulation of the gas, and the diaphragm below is a direct push drive. Its equivalent structure is shown in Figure 1 The first spring sheet is equivalent to the first one-way valve 2, the second spring sheet group is equivalent to the second one-way valve 5, the air inlet is equivalent to the air inlet pipe 1, the air outlet is equivalent to the air outlet pipe 4, the diaphragm 3 located below and the inner recess communication cavity of the valve seat form a negative pressure chamber 6. The diaphragm 3 is connected with a connecting rod 7 below, which makes the valve block isolate and switch the gas through a group of one-way valve mechanisms arranged inside, is suitable for a direct push type sampling diaphragm pump, and makes the diaphragm pump vibrate and make noise when working.

[0032] It is apparent for a person skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or the essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary and non-limiting, the scope of the present application being defined by the claims appended hereto rather than by the above description, and all the changes which fall within the meaning and the scope of the equivalent elements of the claims are intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims to the figures in which the reference signs are used.

[0033] Furthermore, it should be understood that although the present specification describes exemplary embodiments, not every embodiment contains only one independent technical solution, and the present specification is described in this way only for the sake of clarity, and a person skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that a person skilled in the art can understand.

Claims

1. A valve block structure for a direct-push sampling diaphragm pump, characterized by, It comprises: a valve seat, the bottom of which is provided with an inner recessed communication cavity, which is part of a negative pressure chamber, and a top cover, the thickness area of which is provided with a radially inner recessed air inlet and air outlet; the top cover is installed on the upper surface of the valve seat, and the surface of the valve seat after the installation of the top cover forms an air inlet chamber and an air outlet chamber, the lower surface of the top cover corresponding to the outer periphery of the air inlet chamber is tightly attached to the upper surface of the valve seat through a first sealing ring, the lower surface of the top cover corresponding to the outer periphery of the air outlet chamber is tightly attached to the upper surface of the valve seat through a second sealing ring, the radially inner end of the air inlet is communicated with the air inlet chamber, the radially inner end of the air outlet is communicated with the air outlet chamber, the inner recessed communication cavity is provided with a first group of through holes corresponding to the face area of the air inlet chamber, the first spring sheet is fixed at the position corresponding to the face area of the air inlet chamber, the face area of the first spring sheet covers the first group of through holes, the inner recessed communication cavity is provided with a second group of through holes corresponding to the face area of the air outlet chamber, and the second spring sheet group is fixed at the position corresponding to the upper surface of the valve seat, and the face area of the second spring sheet group covers the second group of through holes.

2. A valve block structure for a direct-push sampling diaphragm pump according to claim 1, wherein: The first group of through holes includes two A holes, the face area where the two A holes are located corresponds to the face area of the first spring sheet, the arc-shaped cavity wall of the inner recessed communication cavity is provided with a first inner recessed groove, the upper surface of the first inner recessed groove is a plane, and the first spring sheet is fixed in the first inner recessed groove through a fastening screw.

3. The valve block structure for a direct-push sampling diaphragm pump according to claim 2, characterized in that: The second group of through holes includes six B holes, the second spring sheet group includes three second spring sheets, the face area where the six B holes are located corresponds to the corresponding face area of the three second spring sheets, and each two B holes are provided corresponding to one second spring sheet, the upper surface of the valve seat is provided with a second inner recessed groove located directly below the air outlet chamber, the lower surface of the second inner recessed groove is a plane, and the three second spring sheets are fixed in the second inner recessed groove through fastening screws.

4. A valve block structure for a direct-push sampling diaphragm pump according to claim 1, wherein: After the top cover is installed on the upper surface of the valve seat, it is fastened and connected through a center screw and a peripheral screw of a ring cloth.

5. A valve block structure for a direct-push sampling diaphragm pump according to claim 3, wherein: The total area formed by the combination of the two A holes is equal to the total area formed by the combination of the six B holes.

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