JPS6241073B2 - - Google Patents
Info
- Publication number
- JPS6241073B2 JPS6241073B2 JP11564982A JP11564982A JPS6241073B2 JP S6241073 B2 JPS6241073 B2 JP S6241073B2 JP 11564982 A JP11564982 A JP 11564982A JP 11564982 A JP11564982 A JP 11564982A JP S6241073 B2 JPS6241073 B2 JP S6241073B2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- diaphragm
- pump
- paint
- pump chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000003973 paint Substances 0.000 claims description 39
- 239000010720 hydraulic oil Substances 0.000 claims description 14
- 239000007921 spray Substances 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 5
- 238000010422 painting Methods 0.000 claims description 5
- 230000007423 decrease Effects 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
- 230000006835 compression Effects 0.000 description 14
- 238000007906 compression Methods 0.000 description 14
- 230000004043 responsiveness Effects 0.000 description 5
- 239000000839 emulsion Substances 0.000 description 4
- 238000005086 pumping Methods 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000000740 bleeding effect Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Landscapes
- Reciprocating Pumps (AREA)
- Nozzles (AREA)
Description
【発明の詳細な説明】
本発明は、高粘度塗料や水性エマルジヨン塗料
の圧送に適したエアレス塗装用ダイアフラムポン
プに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a diaphragm pump for airless painting that is suitable for pumping high-viscosity paints and water-based emulsion paints.
エアレス塗装装置に塗料圧送用として使用され
るダイアフラムポンプには、ダイアフラムの一往
復動毎の吐出量が少なく、かつ、高速駆動される
小型のものが多いのであるが、このような小型の
ダイアフラムポンプにおいては、圧送能力を高く
するために、塗料の吸込路と吐出路に夫々介設さ
れる逆止弁の通路断面積が大きく、しかも、弁体
の応答速度が高いことが要求され、特に、弁体の
作動抵抗の大きい高粘度塗料を使用する場合に重
要である。しかるに、小型のダイアフラムポンプ
は、構造を簡単にするために、下部ボデイと上部
ボデイの間にダイアフラムを張設してその下面に
作動油室を、上面にポンプ室を夫々構成し、この
ポンプ室に塗料タンクから塗料を吸込む吸込路は
上部ボデイの上面に開口し、スプレイガンに塗料
を吐出する吐出路は上部ボデイの側面に開口する
ように形成されていて、吸込路に介設される逆止
弁は、下向きに装置されて自重が閉弁方向に作用
するため復帰用のばねはばね定数を小さくしても
弁体の応答性を十分高くすることが可能であるが
吐出路に介設される逆止弁は、水平方向に装置さ
れることになるため復帰用のばねを強くする必要
がある。しかし、吐出側の逆止弁は、運転開始直
後に塗料中に混入したエアを排出する必要がある
ため、復帰用のばねのばね定数を一定値以下にし
なければならず、このために、吐出路をポンプ室
から一旦上方へ立ち上がらせて、ここにばね定数
の小さい復帰用のばねを装着した逆止弁を下向き
に装着し、この逆止弁の後方で吐出路を水平に屈
曲して上部ボデイの側面に開口するようになつて
おり、吐出路が屈曲しているため、水性エマルジ
ヨン塗料を使用した場合に、エマルジヨン機構の
破壊により生じた固形物が屈曲部に滞溜して逆止
弁が作動不能となることがあるばかりでなく、復
帰用のばねが弱いため、高粘度塗料を使用した場
合に応答性が低下し、ポンプの吐出能力が低下す
る欠点がある。 Diaphragm pumps used for pumping paint in airless painting equipment are often small, with a small discharge volume per reciprocating movement of the diaphragm, and are driven at high speed. In order to increase the pumping capacity, it is required that the passage cross-sectional area of the check valves interposed in the suction and discharge passages of the paint be large, and that the response speed of the valve body be high. This is important when using a high viscosity paint that has a large operating resistance on the valve body. However, in order to simplify the structure of a small diaphragm pump, a diaphragm is stretched between a lower body and an upper body, and a hydraulic oil chamber is formed on the lower surface of the diaphragm, and a pump chamber is formed on the upper surface of the diaphragm. The suction passage that sucks paint from the paint tank opens on the top surface of the upper body, and the discharge passage that discharges paint into the spray gun opens on the side of the upper body. Since the stop valve is installed facing downward and its own weight acts in the valve closing direction, it is possible to sufficiently increase the responsiveness of the valve body even if the spring constant of the return spring is small, but it is necessary to insert the spring in the discharge path. Since the check valve is installed horizontally, it is necessary to strengthen the return spring. However, since the check valve on the discharge side must discharge air mixed in the paint immediately after the start of operation, the spring constant of the return spring must be kept below a certain value. Once the passage rises upward from the pump chamber, a check valve equipped with a return spring with a small spring constant is attached downward, and behind this check valve, the discharge passage is bent horizontally and the discharge passage is raised upward from the pump chamber. It is designed to open on the side of the body, and the discharge path is bent, so when a water-based emulsion paint is used, solids generated due to the destruction of the emulsion mechanism accumulate in the bent part, causing a check valve. Not only can the pump become inoperable, but also the return spring is weak, so when high viscosity paint is used, the responsiveness decreases and the discharge capacity of the pump decreases.
本発明は、吐出路を略水平とし、ここに、弁体
が軽量であつて復帰ばねが強くて応答性に優れ、
しかも、弁体の移動距離の割に通路断面積の大き
いポペツト式の逆止弁を介設することによつて、
ポンプの吐出能力を向上するとともに固形分の滞
溜を防止し、さらに、この逆止弁とは別にエア抜
き弁を吐出路に介設することによつて、始動時の
エア抜きを確実になし得るようにしたエアレス塗
装用のダイアフラムポンプを提供することを目的
とするものである。 In the present invention, the discharge passage is made substantially horizontal, and the valve body is lightweight and the return spring is strong and has excellent responsiveness.
Moreover, by installing a poppet-type check valve with a large passage cross-sectional area in relation to the travel distance of the valve body,
This improves the discharge capacity of the pump and prevents solid content from accumulating.In addition, by installing an air bleed valve in the discharge path in addition to this check valve, air bleed is ensured during startup. It is an object of the present invention to provide a diaphragm pump for airless painting.
以下、本発明の一実施例を添付図面に基づいて
説明する。 Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings.
上部ボデイ1の下面には下向きに凹部2が形成
され、下部ボデイ3の前記上部ボデイ1の凹部2
に対応する上面には、その上面に凹部4を形成し
かつ、この凹部4と下面とを連通する中心孔5お
よびその外側の流通孔6とを透設した座板7が嵌
着されているとともに、上部ボデイ1と下部ボデ
イ3の間にはダイアフラム8が水平方向に張られ
ていて、このダイアフラム8を挾んでその上面と
上部ボデイ1の凹部2によつてポンプ室9が、ま
た、ダイアフラム8の下面と座板7の凹部4によ
つて作動油室10が夫々形成されている。下部ボ
デイ3に嵌着した座板7の下面には、その中心孔
5および流通孔6に連通する装置孔11が形成さ
れて、その内に作動油の流通管12が嵌着されて
おり、ダイアフラム8はその下端面に突成した軸
13が座板7の中心孔5を通つて流通管12内に
突出して上下移動自由となつているとともに、座
板7の下面と軸13の下端の間に装着された圧縮
コイルばね14の弾拡力によつて、常時は作動油
室10の容積を減少させる図の下方へ移動付勢さ
れている。 A recess 2 is formed downward in the lower surface of the upper body 1, and the recess 2 of the upper body 1 of the lower body 3 is formed in a downward direction.
A seat plate 7 is fitted on the upper surface corresponding to the seat plate 7. The seat plate 7 has a recess 4 formed in the upper surface, and has a central hole 5 communicating between the recess 4 and the lower surface and a communication hole 6 outside the central hole 5. A diaphragm 8 is stretched horizontally between the upper body 1 and the lower body 3, and a pump chamber 9 is formed between the upper surface of the diaphragm 8 and the recess 2 of the upper body 1, and the diaphragm Hydraulic oil chambers 10 are formed by the lower surfaces of 8 and the recesses 4 of the seat plate 7, respectively. A device hole 11 communicating with the center hole 5 and the circulation hole 6 is formed on the lower surface of the seat plate 7 fitted to the lower body 3, and a hydraulic oil circulation pipe 12 is fitted into the device hole 11. The diaphragm 8 has a shaft 13 protruding from its lower end surface that protrudes into the flow pipe 12 through the center hole 5 of the seat plate 7 and is freely movable up and down. Due to the elastic force of the compression coil spring 14 installed between them, the hydraulic oil chamber 10 is normally urged to move downward to reduce the volume of the hydraulic fluid chamber 10 .
上部ボデイ1には、ポンプ室9と連通して上面
に開口する装置孔15が透設され、この装置孔1
5には図示しないホース等によつて塗料タンクと
接続された上下方向の塗料の吸込管16が嵌着さ
れている。吸込管16の下端には第1の逆止弁1
7が装置されており、円錘台形の弁頭18に弁軸
19を突成した弁体20が、外周上に上下面に連
通する溝21を形成し、かつ、吸込管16内に嵌
着されて固定された保持部材22に弁軸19を挿
通することによつて、上下方向に摺動自由となつ
ているとともに、弁軸19の上端に固定されたば
ね受部材23と保持部材21の間に装着された圧
縮コイルばね24の弾拡力によつて、常時は、弁
頭18が吸込管16の下端を閉塞する方向に付勢
されている。 The upper body 1 is transparently provided with a device hole 15 that communicates with the pump chamber 9 and opens on the top surface.
A vertical paint suction pipe 16 connected to a paint tank via a hose (not shown) or the like is fitted into the pipe 5 . A first check valve 1 is provided at the lower end of the suction pipe 16.
7 is installed, and a valve body 20 having a valve shaft 19 protruding from a trapezoidal valve head 18 forms a groove 21 on the outer periphery that communicates with the upper and lower surfaces, and is fitted into the suction pipe 16. By inserting the valve shaft 19 through the holding member 22 which is fixed to the valve shaft 19, the valve shaft 19 can be freely slid in the vertical direction. The valve head 18 is normally urged in a direction to close the lower end of the suction pipe 16 by the elastic expansion force of a compression coil spring 24 attached to the valve head 18 .
また、上部ボデイ1内には、ポンプ室9とこの
上部ボデイ1の側面に開口する装置孔25とに連
通する水平方向の吐出路26が形成されており、
この装置孔25には第2の逆止弁27が装置され
ている。装置孔25には第2の逆止弁27の本体
を構成する筒形のホルダ28が嵌装され、その一
端の外周に形成した雄ねじを装置孔25に形成し
た雌ねじに螺合して固定されており、このホルダ
28内には外周上にその前後面に連通する溝29
を形成した保持部材30が嵌着されて固定されて
いて、外周に超硬合金からなるリング31をろう
付けした円板形の弁頭32に弁軸33を突成した
弁体34が、その弁軸33を保持部材30に挿通
して水平方向に摺動自由となつているとともに、
弁軸33の先端に固定されたばね受部材35と保
持部材30の間に装着したばね定数の大きい圧縮
コイルばね36の弾拡力によつて、弁頭32が常
時はホルダ28の一端に嵌着した超硬合金からな
る弁座37に当接して、その弁孔38を閉塞する
ようになつている。また、ホルダ28の他端の外
周に形成された雄ねじには、弁孔38に連通する
流通孔39を透設した接続部材40が螺着されて
固定されており、この接続部材40は図示しない
ホースを介してエアレススプレイガンと接続され
ている。 Further, a horizontal discharge passage 26 is formed in the upper body 1 and communicates with the pump chamber 9 and a device hole 25 that opens on the side surface of the upper body 1.
A second check valve 27 is installed in this device hole 25 . A cylindrical holder 28 constituting the main body of the second check valve 27 is fitted into the device hole 25, and is fixed by screwing a male thread formed on the outer periphery of one end to a female thread formed in the device hole 25. Inside this holder 28, there is a groove 29 on the outer periphery that communicates with the front and rear surfaces.
A valve body 34 has a valve stem 33 protruding from a disc-shaped valve head 32 having a ring 31 made of cemented carbide brazed on its outer periphery. The valve shaft 33 is inserted into the holding member 30 so that it can slide freely in the horizontal direction, and
The valve head 32 is normally fitted to one end of the holder 28 by the elastic expansion force of a compression coil spring 36 with a large spring constant installed between a spring bearing member 35 fixed to the tip of the valve shaft 33 and a holding member 30. The valve seat 37 is made of cemented carbide and the valve hole 38 is closed. Further, a connecting member 40 having a flow hole 39 communicating with the valve hole 38 is screwed and fixed to a male thread formed on the outer periphery of the other end of the holder 28, and this connecting member 40 is not shown. Connected to an airless spray gun via a hose.
さらに、上部ボデイ1には、前記吐出路26と
直角に連通してその上面に開口する装置孔41が
形成され、この装置孔41にはエア抜き弁を兼用
したリリーフ弁42が装置されている。このリリ
ーフ弁42は、装置孔41に嵌着して固定したホ
ルダ43内に、その先端に固着した弁座44の弁
孔45を開閉可能に対応する弁体46を保持し、
かつ、上下面に連通する溝47を形成した保持部
材48を上下摺動自由に嵌合し、その上方に装置
した弁杆49との間にばね定数の小さい圧縮コイ
ルばね50を装着して弁体46を閉弁方向に付勢
し、また弁杆49とホルダ43の上端の固定部材
51との間に前記第2の逆止弁27の圧縮コイル
ばね36よりもさらにばね定数の大きい圧縮コイ
ルばね52を装着して弁杆49を閉弁方向に付勢
するとともに、弁杆49の上端に固定部材51と
係合して弁杆49を上下2位置で掛け止めする切
換つまみ53を設けたものであつて、エア抜きを
行なう場合には図示したように弁杆49をその下
端が保持部材48と離間した位置で掛止しておく
ことによつて、塗料に所定の圧力を作用したとき
に、塗料がばね力の小さいコイルばね50の弾力
に抗して弁体46を押し上げて弁孔45を開い
て、塗料内に混入していたエアが塗料とともに流
通孔54を通つてパイプ55から図示しないタン
クに排出され、エア抜きが完了した後には、切換
つまみ53を90度回動して弁杆49をその下端が
保持部材48に突き当たる位置まで下降させて、
弁体46をばね力の大きいコイルばね52の弾力
によつて弁座44に押し付けた状態とすることに
よつて、塗料の圧力が異常に高くなつた場合にの
みこれを作用させて塗料をタンクへ排出し得るよ
うになつている。 Further, the upper body 1 is formed with a device hole 41 that communicates with the discharge passage 26 at right angles and opens on its upper surface, and this device hole 41 is equipped with a relief valve 42 that also serves as an air bleed valve. . This relief valve 42 holds a valve body 46 corresponding to the valve hole 45 of a valve seat 44 fixed to the tip thereof so as to be able to open and close, in a holder 43 that is fitted and fixed in the device hole 41.
In addition, a holding member 48 having a groove 47 communicating with the upper and lower surfaces is fitted to freely slide vertically, and a compression coil spring 50 with a small spring constant is installed between the holding member 48 and the valve rod 49 installed above the holding member 48 to form a valve. A compression coil having a spring constant larger than that of the compression coil spring 36 of the second check valve 27 is installed between the valve rod 49 and the fixing member 51 at the upper end of the holder 43. A spring 52 is attached to bias the valve rod 49 in the valve closing direction, and a switching knob 53 is provided at the upper end of the valve rod 49 to engage with a fixing member 51 and lock the valve rod 49 in two positions, upper and lower. When performing air bleeding, the valve rod 49 is held at a position where its lower end is separated from the holding member 48 as shown in the figure, and when a predetermined pressure is applied to the paint. Then, the paint pushes up the valve body 46 against the elasticity of the coil spring 50, which has a small spring force, and opens the valve hole 45, and the air mixed in the paint passes through the circulation hole 54 together with the paint from the pipe 55. After the air has been discharged into a tank (not shown) and the air has been vented, the switching knob 53 is rotated 90 degrees to lower the valve rod 49 to the position where its lower end abuts the holding member 48.
By keeping the valve body 46 pressed against the valve seat 44 by the elasticity of the coil spring 52, which has a large spring force, this is applied only when the pressure of the paint becomes abnormally high to drain the paint into the tank. It is designed to be able to be discharged to
次に本実施例の作用について説明する。まず、
リリーフ弁42を、図示したように弁杆49が上
方位置で掛止された状態でポンプを起動させる
と、作動油が作動油室10に供給されてダイアフ
ラム8が圧縮コイルばね14の弾力に抗して鎖線
位置に上昇して一旦ポンプ室9の容積を減少さ
せ、引き続いて作動油が作動油室10から排出さ
れて、ダイアフラム8がばね14の復元力によつ
て実線位置まで復動してポンプ室9の容積が増大
されると、吸込管16に装置した第1の逆止弁1
7の弁体20が圧縮コイルばね24の弾力に抗し
て下方に移動して開弁し、塗料タンクからの液体
塗料が吸込管16および保持部材22の溝21を
通つてポンプ室9に供給され、再び作動油が供給
されてダイアフラム8の上昇によりポンプ室9の
容積が縮小することによつて、第1の逆止弁17
が閉弁すると同時にポンプ室9内の塗料が押圧さ
れて吐出路26に吐き出されるのであるが、この
塗料にはポンプ室9内に残留していたエアが混入
しており、その塗料圧力は吐出路26の先端に設
けられた第2の逆止弁27の圧縮コイルばね36
を弾縮するまでには到らず、この塗料はエアとと
もに、リリーフ弁42の小さなばね力で押圧され
ている弁体46を押し上げて、前述したようにタ
ンクに排出され、しばらくはこの作用がくり返さ
れてエア抜きが行なわれる。エア抜きが完了し
て、リリーフ弁42の切換つまみ53の操作によ
つて弁体46を弁座44に大きなばね力で押し付
けた状態にすると、ダイアフラム8の上昇によつ
て吐き出されたエアの混入していない塗料が吐出
路26を通つてその先端に設けた第2の逆止弁2
7に到り、その塗料圧力によつて、リリーフ弁4
2の上方の圧縮コイルばね52よりも小さいもの
の比較的ばね定数の大きい圧縮コイルばね36の
弾力に抗して弁体34を鎖線で示すように開弁
し、塗料がホルダ28内および保持部材30の溝
29を通り、さらに接続部材40の流通孔を通つ
て図示しないホースを介してエアレススプレイガ
ンに圧送され、ダイアフラム8が復動すると、吐
出路26に設けた第2の逆止弁27の弁体34が
圧縮コイルばね36の復元力によつて実線位置ば
で復動して閉弁すると同時に、吸込管16の第1
の逆止弁17の弁体20が開弁して塗料がポンプ
室9に吸い込まれ、引き続くダイアフラム8の上
昇によつて、第1の逆止弁17の弁体20が閉弁
すると同時に塗料が開弁した第2の逆止弁27か
らエアレススプレイガンに圧送され、このような
くり返しによつて塗料タンクから吸い込まれた液
体塗料が順次にエアレススプレイガンに圧送され
る。 Next, the operation of this embodiment will be explained. first,
When the pump is started with the relief valve 42 latched at the upper position as shown in the figure, hydraulic oil is supplied to the hydraulic oil chamber 10 and the diaphragm 8 resists the elasticity of the compression coil spring 14. The diaphragm 8 moves back to the solid line position by the restoring force of the spring 14, and the volume of the pump chamber 9 is temporarily reduced. When the volume of the pump chamber 9 is increased, the first check valve 1 installed in the suction pipe 16
The valve body 20 of No. 7 moves downward against the elasticity of the compression coil spring 24 to open the valve, and liquid paint from the paint tank is supplied to the pump chamber 9 through the suction pipe 16 and the groove 21 of the holding member 22. When the hydraulic oil is supplied again and the volume of the pump chamber 9 is reduced due to the rise of the diaphragm 8, the first check valve 17 is closed.
At the same time as the valve closes, the paint in the pump chamber 9 is pressed and discharged into the discharge passage 26, but this paint is mixed with air remaining in the pump chamber 9, and the paint pressure is lower than the discharge path. Compression coil spring 36 of the second check valve 27 provided at the tip of the passage 26
The paint, together with the air, pushes up the valve element 46, which is pressed by the small spring force of the relief valve 42, and is discharged into the tank as described above, and this action continues for a while. Air is removed repeatedly. When air bleeding is completed and the valve body 46 is pressed against the valve seat 44 with a large spring force by operating the switching knob 53 of the relief valve 42, air discharged by the rise of the diaphragm 8 will be mixed in. The unused paint passes through the discharge passage 26 to the second check valve 2 provided at its tip.
7, and due to the paint pressure, the relief valve 4
The valve body 34 is opened as shown by the chain line against the elasticity of the compression coil spring 36 which is smaller than the compression coil spring 52 above 2 but has a relatively large spring constant, and the paint is spilled into the holder 28 and the holding member 30. The airless spray gun passes through the groove 29 of the connecting member 40 and then passes through the flow hole of the connecting member 40 via a hose (not shown) to the airless spray gun. When the diaphragm 8 moves back, the second check valve 27 provided in the discharge passage 26 At the same time, the valve body 34 moves back and closes at the solid line position due to the restoring force of the compression coil spring 36, and at the same time, the first valve of the suction pipe 16
The valve body 20 of the first check valve 17 opens and the paint is sucked into the pump chamber 9, and as the diaphragm 8 continues to rise, the valve body 20 of the first check valve 17 closes and the paint is sucked into the pump chamber 9. The liquid paint is pumped from the opened second check valve 27 to the airless spray gun, and by repeating this process, the liquid paint sucked from the paint tank is sequentially pumped to the airless spray gun.
ここで、吐出路26の先端に設けられている第
2の逆止弁27は、弁体34の移動距離の割に通
路断面積の大きいポペツト型であり、しかも圧縮
コイルばね36のばね定数が比較的大きく応答性
が高いために吐出能力に優れ、また、第2の逆止
弁27が水平方向に取り付けられて、ポンプ室9
に連通する吐出路26が水平となつているため
に、水性エマルジヨン塗料を使用した場合にも、
その固形分の滞溜により第2の逆止弁27が作動
不能となるような恐れは全くない。 Here, the second check valve 27 provided at the tip of the discharge passage 26 is a poppet type having a large passage cross-sectional area relative to the moving distance of the valve body 34, and the spring constant of the compression coil spring 36 is Because it is relatively large and has high responsiveness, it has excellent discharge ability, and the second check valve 27 is installed horizontally, so that the pump chamber 9
Since the discharge passage 26 communicating with the water is horizontal, even when using water-based emulsion paint,
There is no possibility that the second check valve 27 will become inoperable due to the accumulation of solid content.
なお、本実施例においては、リリーフ弁42が
エア抜き機能を兼ね備えているために、エア抜き
弁を別個に設ける必要がなく、ポンプをコンパク
トにまとめ得る利点を有する。 In this embodiment, since the relief valve 42 also has an air bleed function, there is no need to provide a separate air bleed valve, and there is an advantage that the pump can be made compact.
上記実施例によつて具体的に説明したように、
本発明のエアレス塗装用ダイアフラムポンプは、
略水平に張設されたダイアフラムによつて下側の
作動油室と上側のポンプ室を区画し、該ポンプ室
を塗料タンクに連通する吸込路を略上下方向に、
スプレイガンに連通する吐出路を略水平方向に
夫々形成して該流路に逆止弁を介設し、前記作動
油室への作動油の供給と排出により前記ダイアフ
ラムを往復駆動して前記ポンプ室の容積を増減
し、前記2個の逆止弁を交互に開閉して前記吸込
路から吸込んだ液体塗料を前記吐出路から吐出す
るようにしたダイアフラムポンプにおいて、前記
吐出路に介設した逆止弁を、円板形の弁頭に弁軸
を突成した弁体の前記弁軸にコイルばねを装着し
て前記弁頭を弁座に当接する構成としたポペツト
型とし、かつ、該逆止弁と前記ポンプ室との間に
エア抜き弁を介設したことを要旨とするものであ
つて、吐出路を略水平として、ここに弁体が軽量
であつて、コイルばねの復元力が大きくて応答性
に優れ、しかも弁体の移動距離の割に通路断面積
の大きいポペツト型の逆止弁を介設したから、ポ
ンプの吐出能力が極めて向上するとともに、塗料
の固形分の滞溜が防止できて、この逆止弁の作動
不良を防止し得るとともに、さらに、この逆止弁
とは別にエア抜き弁を吐出路に介設することによ
つて、始動時のエア抜きを確実に行なうことがで
きる効果を奏する。 As specifically explained in the above embodiment,
The airless painting diaphragm pump of the present invention is
A lower hydraulic oil chamber and an upper pump chamber are partitioned by a diaphragm stretched approximately horizontally, and a suction passage connecting the pump chamber to the paint tank extends approximately vertically.
Discharge passages communicating with the spray guns are formed in a substantially horizontal direction, check valves are interposed in the passages, and the diaphragm is reciprocated by supplying and discharging hydraulic oil to the hydraulic oil chamber, thereby pumping the pump. In the diaphragm pump, the liquid paint sucked in from the suction path is discharged from the discharge path by increasing and decreasing the volume of the chamber and alternately opening and closing the two check valves. The stop valve is a poppet type having a configuration in which a coil spring is attached to the valve stem of a valve body having a valve stem protruding from a disc-shaped valve head, and the valve head abuts against the valve seat, and vice versa. The gist is that an air bleed valve is interposed between the stop valve and the pump chamber, the discharge passage is approximately horizontal, the valve body is lightweight, and the restoring force of the coil spring is By installing a poppet-type check valve that is large and has excellent responsiveness, and has a large passage cross-sectional area relative to the travel distance of the valve body, the discharge capacity of the pump is greatly improved, and the solid content of the paint is prevented from accumulating. In addition, by interposing an air bleed valve in the discharge passage separately from this check valve, air bleed during startup can be ensured. It produces the effect that can be achieved.
図は本発明ダイアフラムポンプの一実施例を示
す縦断面図である。
8:ダイアフラム、9:ポンプ室、10:作動
油室、16:吸込管、17:第1の逆止弁、2
6:吐出路、27:第2の逆止弁、32:弁頭、
33:弁軸、34:弁体、36:圧縮コイルば
ね、37:弁座、42:リリーフ弁。
The figure is a longitudinal sectional view showing an embodiment of the diaphragm pump of the present invention. 8: Diaphragm, 9: Pump chamber, 10: Hydraulic oil chamber, 16: Suction pipe, 17: First check valve, 2
6: discharge path, 27: second check valve, 32: valve head,
33: Valve stem, 34: Valve body, 36: Compression coil spring, 37: Valve seat, 42: Relief valve.
Claims (1)
側の作動油室と上側のポンプ室を区画し、該ポン
プ室を塗料タンクに連通する吸込路を略上下方向
に、スプレイガンに連通する吐出路を略水平方向
に夫々形成して該流路に逆止弁を介設し、前記作
動油室への作動油の供給と排出により前記ダイア
フラムを往復駆動して前記ポンプ室の容積を増減
し、前記2個の逆止弁を交互に開閉して前記吸入
路から吸込んだ液体塗料を前記吐出路から吐出す
るようにしたダイアフラムポンプにおいて、前記
吐出路に介設した逆止弁を、円板形の弁頭に弁軸
を突成した弁体の前記弁軸にコイルばねを装着し
て前記弁頭を弁座に当接する構成としたポペツト
型とし、かつ、該逆止弁と前記ポンプ室との間に
エア抜き弁を介設したことを特徴とするエアレス
塗装用ダイアフラムポンプ。1 A lower hydraulic oil chamber and an upper pump chamber are partitioned by a diaphragm stretched approximately horizontally, and a suction passage that communicates the pump chamber with the paint tank is connected approximately vertically to a discharge passage that communicates with the spray gun. A flow path is formed in a substantially horizontal direction, a check valve is interposed in the flow path, and the diaphragm is reciprocated by supplying and discharging hydraulic oil to the hydraulic oil chamber to increase or decrease the volume of the pump chamber. In the diaphragm pump, the liquid paint sucked in from the suction passage is discharged from the discharge passage by alternately opening and closing the two check valves, wherein the check valve interposed in the discharge passage is arranged in a disc shape. The valve head is a poppet-shaped valve body with a valve stem protruding from the valve body, and a coil spring is attached to the valve stem of the valve body so that the valve head comes into contact with a valve seat, and the check valve and the pump chamber are connected to each other. A diaphragm pump for airless painting, characterized by having an air bleed valve interposed between the pump and the diaphragm pump.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11564982A JPS596955A (en) | 1982-07-02 | 1982-07-02 | Diaphragm pump for airless coating |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11564982A JPS596955A (en) | 1982-07-02 | 1982-07-02 | Diaphragm pump for airless coating |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS596955A JPS596955A (en) | 1984-01-14 |
JPS6241073B2 true JPS6241073B2 (en) | 1987-09-01 |
Family
ID=14667862
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11564982A Granted JPS596955A (en) | 1982-07-02 | 1982-07-02 | Diaphragm pump for airless coating |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS596955A (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2548337Y2 (en) * | 1989-04-20 | 1997-09-17 | アネスト岩田株式会社 | Valve device for hydraulic diaphragm pump |
JP4635420B2 (en) * | 2003-08-29 | 2011-02-23 | 凸版印刷株式会社 | Indirect fluid diaphragm pump |
CN109209836A (en) * | 2018-09-29 | 2019-01-15 | 陕西科技大学 | A kind of pump housing compensator |
-
1982
- 1982-07-02 JP JP11564982A patent/JPS596955A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS596955A (en) | 1984-01-14 |
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